{"title":"MS391-16 Chainsaw","description":null,"products":[{"product_id":"stihl®-ms-391","title":"STIHL® MS 391 Chainsaw","description":"\u003cp data-start=\"29\" data-end=\"290\" class=\"PDq2pG_selectionAnchorContainer\"\u003eThe \u003cstrong data-start=\"33\" data-end=\"96\"\u003e\u003ca data-start=\"35\" data-end=\"94\" rel=\"noopener\" class=\"decorated-link\" href=\"https:\/\/arns.ca\/products\/stihl%C2%AE-ms-391\"\u003eSTIHL MS 391\u003c\/a\u003e\u003c\/strong\u003e is a high-displacement farm and acreage chainsaw built for regular firewood cutting, rural property maintenance, storm cleanup, construction timber, and demanding work in medium to larger logs.\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"292\" data-end=\"692\"\u003eIts \u003cstrong data-start=\"296\" data-end=\"326\"\u003e64.1 cc STIHL 2-MIX engine\u003c\/strong\u003e produces \u003cstrong data-start=\"336\" data-end=\"370\"\u003e3.3 kW or approximately 4.5 hp\u003c\/strong\u003e, giving it more displacement than the MS 362 C-M and enough torque to support longer guide bars and sustained cutting. The powerhead weighs approximately \u003cstrong data-start=\"525\" data-end=\"535\"\u003e6.2 kg\u003c\/strong\u003e, placing the MS 391 firmly above the MS 291 and below STIHL’s larger professional felling saws in size and capability. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"694\" data-end=\"989\"\u003eThe MS 391 is not a professional forestry saw in the same sense as the MS 362 C-M or MS 400 C-M. Instead, it is designed for farmers, landscapers, tradespeople, acreage owners, and serious firewood cutters who want substantial engine capacity at a lower purchase price than a professional model.\u003c\/p\u003e\n\u003ch2 data-section-id=\"1pzefus\" data-start=\"991\" data-end=\"1012\"\u003eOur Recommendation\u003c\/h2\u003e\n\u003cp data-start=\"1014\" data-end=\"1225\"\u003eWe recommend the STIHL MS 391 to customers who regularly cut larger firewood, maintain wooded rural properties, or need a strong saw for farm and construction use without paying for professional power-to-weight.\u003c\/p\u003e\n\u003cp data-start=\"1227\" data-end=\"1273\"\u003eIt is especially well suited to customers who:\u003c\/p\u003e\n\u003cul data-start=\"1275\" data-end=\"1569\"\u003e\n\u003cli data-section-id=\"lqd3jw\" data-start=\"1275\" data-end=\"1317\"\u003eFrequently use an 18-inch or 20-inch bar\u003c\/li\u003e\n\u003cli data-section-id=\"17dxpvf\" data-start=\"1318\" data-end=\"1359\"\u003eCut several cords of firewood each year\u003c\/li\u003e\n\u003cli data-section-id=\"1ums3d5\" data-start=\"1360\" data-end=\"1408\"\u003eWork with larger softwood or moderate hardwood\u003c\/li\u003e\n\u003cli data-section-id=\"r43pkv\" data-start=\"1409\" data-end=\"1446\"\u003eNeed more capability than an MS 291\u003c\/li\u003e\n\u003cli data-section-id=\"179fofb\" data-start=\"1447\" data-end=\"1503\"\u003eValue displacement and torque more than minimum weight\u003c\/li\u003e\n\u003cli data-section-id=\"8afnlm\" data-start=\"1504\" data-end=\"1569\"\u003eWant a durable farm-class saw with familiar mechanical controls\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1571\" data-end=\"1999\"\u003eThe MS 391 is not the best choice for every operator. At approximately 6.2 kg without the cutting attachment, it is heavier than the MS 362 C-M while producing slightly less rated power. Customers carrying a saw throughout the day or using it professionally will usually benefit from the lighter professional construction and M-Tronic management of the \u003cstrong data-start=\"1924\" data-end=\"1998\"\u003e\u003ca data-start=\"1926\" data-end=\"1996\" rel=\"noopener\" class=\"decorated-link\" href=\"https:\/\/arns.ca\/products\/stihl%C2%AE-ms-362-c-m-chainsaw\"\u003eMS 362 C-M\u003c\/a\u003e\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"2001\" data-end=\"2158\"\u003eFor farm, acreage, and firewood work where purchase value matters more than professional weight reduction, the MS 391 remains a practical and capable option.\u003c\/p\u003e\n\u003ch2 data-section-id=\"xj90k\" data-start=\"2160\" data-end=\"2178\"\u003eBest Suited For\u003c\/h2\u003e\n\u003cp data-start=\"2180\" data-end=\"2228\"\u003eThe STIHL MS 391 is particularly well suited to:\u003c\/p\u003e\n\u003cul data-start=\"2230\" data-end=\"2639\"\u003e\n\u003cli data-section-id=\"znhgu0\" data-start=\"2230\" data-end=\"2274\"\u003eRegular and higher-volume firewood cutting\u003c\/li\u003e\n\u003cli data-section-id=\"43q0b8\" data-start=\"2275\" data-end=\"2314\"\u003eFarms, acreages, and rural properties\u003c\/li\u003e\n\u003cli data-section-id=\"16zv6t3\" data-start=\"2315\" data-end=\"2355\"\u003eBucking medium and larger fallen trees\u003c\/li\u003e\n\u003cli data-section-id=\"1wga99j\" data-start=\"2356\" data-end=\"2384\"\u003eStorm and windfall cleanup\u003c\/li\u003e\n\u003cli data-section-id=\"1swxp52\" data-start=\"2385\" data-end=\"2414\"\u003eCutting construction timber\u003c\/li\u003e\n\u003cli data-section-id=\"14bo9qs\" data-start=\"2415\" data-end=\"2449\"\u003eFence-line and trail maintenance\u003c\/li\u003e\n\u003cli data-section-id=\"1vvz7b1\" data-start=\"2450\" data-end=\"2492\"\u003eLandscaping and property-management work\u003c\/li\u003e\n\u003cli data-section-id=\"1i8cig3\" data-start=\"2493\" data-end=\"2545\"\u003eExperienced homeowners who have outgrown an MS 291\u003c\/li\u003e\n\u003cli data-section-id=\"1gxy922\" data-start=\"2546\" data-end=\"2639\"\u003eCustomers who want substantial displacement without stepping into a larger professional saw\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-section-id=\"1dcssph\" data-start=\"2641\" data-end=\"2682\"\u003e64.1 cc Power for Larger Property Work\u003c\/h2\u003e\n\u003cp data-start=\"2684\" data-end=\"2902\"\u003eThe MS 391 uses a \u003cstrong data-start=\"2702\" data-end=\"2761\"\u003e64.1 cc engine producing 3.3 kW or approximately 4.5 hp\u003c\/strong\u003e. STIHL positions it for firewood cutting, landscape maintenance, agriculture, and construction timber. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"2904\" data-end=\"2961\"\u003eThat additional displacement becomes useful when cutting:\u003c\/p\u003e\n\u003cul data-start=\"2963\" data-end=\"3190\"\u003e\n\u003cli data-section-id=\"15vnyd9\" data-start=\"2963\" data-end=\"2987\"\u003eLarger firewood rounds\u003c\/li\u003e\n\u003cli data-section-id=\"1ijjv7w\" data-start=\"2988\" data-end=\"3004\"\u003eDense softwood\u003c\/li\u003e\n\u003cli data-section-id=\"1m4e5id\" data-start=\"3005\" data-end=\"3024\"\u003eModerate hardwood\u003c\/li\u003e\n\u003cli data-section-id=\"1p4qea4\" data-start=\"3025\" data-end=\"3071\"\u003eRepeated logs during longer cutting sessions\u003c\/li\u003e\n\u003cli data-section-id=\"srcc20\" data-start=\"3072\" data-end=\"3093\"\u003eStorm-damaged trees\u003c\/li\u003e\n\u003cli data-section-id=\"1wawxt4\" data-start=\"3094\" data-end=\"3121\"\u003eRural construction timber\u003c\/li\u003e\n\u003cli data-section-id=\"1xcogcq\" data-start=\"3122\" data-end=\"3190\"\u003eMaterial that places sustained demand on an 18-inch or 20-inch bar\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3192\" data-end=\"3438\"\u003eThe MS 391 is designed to provide dependable torque rather than the lighter, faster-revving feel of a professional saw. That makes it well suited to owners who want a substantial work saw but do not need to carry it through a full forestry shift.\u003c\/p\u003e\n\u003ch2 data-section-id=\"aaj8w3\" data-start=\"3440\" data-end=\"3484\"\u003eWhere the MS 391 Fits in the STIHL Lineup\u003c\/h2\u003e\n\u003cp data-start=\"3486\" data-end=\"3632\"\u003eThe MS 391 sits above the MS 291 in STIHL’s farm and acreage range and below the larger professional models intended for high-production forestry.\u003c\/p\u003e\n\u003cp data-start=\"3634\" data-end=\"3724\"\u003eCompared with the MS 291, it adds displacement, power, and greater comfort in larger wood.\u003c\/p\u003e\n\u003cp data-start=\"3726\" data-end=\"3766\"\u003eCompared with the MS 362 C-M, it offers:\u003c\/p\u003e\n\u003cul data-start=\"3768\" data-end=\"3960\"\u003e\n\u003cli data-section-id=\"12awm6i\" data-start=\"3768\" data-end=\"3787\"\u003eMore displacement\u003c\/li\u003e\n\u003cli data-section-id=\"7b8irw\" data-start=\"3788\" data-end=\"3812\"\u003eA lower purchase price\u003c\/li\u003e\n\u003cli data-section-id=\"wxaf5c\" data-start=\"3813\" data-end=\"3856\"\u003eConventional mechanical engine management\u003c\/li\u003e\n\u003cli data-section-id=\"vsvbhi\" data-start=\"3857\" data-end=\"3887\"\u003eA heavier farm-class chassis\u003c\/li\u003e\n\u003cli data-section-id=\"qjdlts\" data-start=\"3888\" data-end=\"3915\"\u003eSlightly less rated power\u003c\/li\u003e\n\u003cli data-section-id=\"l2v1es\" data-start=\"3916\" data-end=\"3960\"\u003eA lower professional power-to-weight ratio\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3962\" data-end=\"4132\"\u003eThe MS 391 is best understood as a large rural property and firewood saw, not as a budget version of the MS 362 C-M. The two models are built around different priorities.\u003c\/p\u003e\n\u003ch2 data-section-id=\"x0k6rs\" data-start=\"4134\" data-end=\"4167\"\u003eWhat Can the STIHL MS 391 Cut?\u003c\/h2\u003e\n\u003cp data-start=\"4169\" data-end=\"4253\"\u003eThe MS 391 is capable of handling a broad range of heavier property work, including:\u003c\/p\u003e\n\u003cul data-start=\"4255\" data-end=\"4609\"\u003e\n\u003cli data-section-id=\"tvpap\" data-start=\"4255\" data-end=\"4283\"\u003eProcessing annual firewood\u003c\/li\u003e\n\u003cli data-section-id=\"16zv6t3\" data-start=\"4284\" data-end=\"4324\"\u003eBucking medium and larger fallen trees\u003c\/li\u003e\n\u003cli data-section-id=\"kisdpa\" data-start=\"4325\" data-end=\"4360\"\u003eCutting rural construction timber\u003c\/li\u003e\n\u003cli data-section-id=\"qwxltz\" data-start=\"4361\" data-end=\"4391\"\u003eRemoving storm-damaged limbs\u003c\/li\u003e\n\u003cli data-section-id=\"109b0hh\" data-start=\"4392\" data-end=\"4421\"\u003eClearing wooded fence lines\u003c\/li\u003e\n\u003cli data-section-id=\"hxywhw\" data-start=\"4422\" data-end=\"4459\"\u003eMaintaining access roads and trails\u003c\/li\u003e\n\u003cli data-section-id=\"qqnv6t\" data-start=\"4460\" data-end=\"4534\"\u003eFelling manageable trees where the operator has the appropriate training\u003c\/li\u003e\n\u003cli data-section-id=\"j5ldt9\" data-start=\"4535\" data-end=\"4609\"\u003eCutting logs that regularly exceed the comfortable workload of an MS 291\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"4611\" data-end=\"4837\"\u003eGuide-bar length should not be treated as the only measure of cutting capacity. Wood species, chain sharpness, cutting technique, engine condition, and the amount of continuous work all affect how comfortably the saw performs.\u003c\/p\u003e\n\u003cp data-start=\"4839\" data-end=\"5038\"\u003eThe MS 391 can reach through substantial timber, but operators facing very large trees or long-bar work as a primary application should consider the MS 462 C-M, MS 500i, MS 661 C-M, or larger models.\u003c\/p\u003e\n\u003ch2 data-section-id=\"17ayiva\" data-start=\"5040\" data-end=\"5070\"\u003eChoosing a Guide-Bar Length\u003c\/h2\u003e\n\u003cp data-start=\"5072\" data-end=\"5187\"\u003eThe correct bar length should reflect the wood being cut most often, not simply the largest bar the saw can accept.\u003c\/p\u003e\n\u003ch3 data-section-id=\"1np24pd\" data-start=\"5189\" data-end=\"5204\"\u003e16-Inch Bar\u003c\/h3\u003e\n\u003cp data-start=\"5206\" data-end=\"5282\"\u003eA 16-inch bar creates the lightest and most responsive MS 391 configuration.\u003c\/p\u003e\n\u003cp data-start=\"5284\" data-end=\"5304\"\u003eIt is suitable when:\u003c\/p\u003e\n\u003cul data-start=\"5306\" data-end=\"5520\"\u003e\n\u003cli data-section-id=\"1imxkb9\" data-start=\"5306\" data-end=\"5333\"\u003eMost wood is medium-sized\u003c\/li\u003e\n\u003cli data-section-id=\"1urunqq\" data-start=\"5334\" data-end=\"5366\"\u003eLimbing and cleanup are common\u003c\/li\u003e\n\u003cli data-section-id=\"1m5ctun\" data-start=\"5367\" data-end=\"5416\"\u003eThe saw will be carried around a large property\u003c\/li\u003e\n\u003cli data-section-id=\"i3ll1c\" data-start=\"5417\" data-end=\"5458\"\u003eManoeuvrability matters more than reach\u003c\/li\u003e\n\u003cli data-section-id=\"13do8px\" data-start=\"5459\" data-end=\"5520\"\u003eThe operator wants the engine to feel especially responsive\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"5522\" data-end=\"5636\"\u003eA short bar may seem unusual on a 64.1 cc saw, but it can produce excellent cutting performance in dense firewood.\u003c\/p\u003e\n\u003ch3 data-section-id=\"1pc5cpr\" data-start=\"5638\" data-end=\"5653\"\u003e18-Inch Bar\u003c\/h3\u003e\n\u003cp data-start=\"5655\" data-end=\"5730\"\u003eAn 18-inch bar offers a strong balance of reach, handling, and engine load.\u003c\/p\u003e\n\u003cp data-start=\"5732\" data-end=\"5756\"\u003eIt is a good choice for:\u003c\/p\u003e\n\u003cul data-start=\"5758\" data-end=\"5901\"\u003e\n\u003cli data-section-id=\"ivp5ig\" data-start=\"5758\" data-end=\"5780\"\u003eMixed firewood sizes\u003c\/li\u003e\n\u003cli data-section-id=\"byr7wa\" data-start=\"5781\" data-end=\"5812\"\u003eGeneral farm and acreage work\u003c\/li\u003e\n\u003cli data-section-id=\"1cywv3z\" data-start=\"5813\" data-end=\"5828\"\u003eStorm cleanup\u003c\/li\u003e\n\u003cli data-section-id=\"q9ki28\" data-start=\"5829\" data-end=\"5850\"\u003eConstruction timber\u003c\/li\u003e\n\u003cli data-section-id=\"15fdvot\" data-start=\"5851\" data-end=\"5901\"\u003eCustomers who want one saw for varied rural work\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"5903\" data-end=\"5981\"\u003eFor many owners, the 18-inch configuration will be the most versatile pairing.\u003c\/p\u003e\n\u003ch3 data-section-id=\"85t5lg\" data-start=\"5983\" data-end=\"5998\"\u003e20-Inch Bar\u003c\/h3\u003e\n\u003cp data-start=\"6000\" data-end=\"6077\"\u003eA 20-inch bar takes better advantage of the MS 391’s displacement and torque.\u003c\/p\u003e\n\u003cp data-start=\"6079\" data-end=\"6100\"\u003eIt is well suited to:\u003c\/p\u003e\n\u003cul data-start=\"6102\" data-end=\"6286\"\u003e\n\u003cli data-section-id=\"15vnyd9\" data-start=\"6102\" data-end=\"6126\"\u003eLarger firewood rounds\u003c\/li\u003e\n\u003cli data-section-id=\"1606krd\" data-start=\"6127\" data-end=\"6159\"\u003eBucking medium and larger logs\u003c\/li\u003e\n\u003cli data-section-id=\"ms2nvi\" data-start=\"6160\" data-end=\"6206\"\u003eWork where extra reach reduces repositioning\u003c\/li\u003e\n\u003cli data-section-id=\"1fdc822\" data-start=\"6207\" data-end=\"6286\"\u003eCustomers who regularly encounter timber beyond the comfort zone of an MS 291\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"6288\" data-end=\"6482\"\u003eThe 20-inch bar adds front-end weight and requires the engine to drive more chain. Customers working primarily in smaller wood may find the 18-inch setup better balanced and faster to manoeuvre.\u003c\/p\u003e\n\u003ch3 data-section-id=\"r0dlv5\" data-start=\"6484\" data-end=\"6499\"\u003e25-Inch Bar\u003c\/h3\u003e\n\u003cp data-start=\"6501\" data-end=\"6659\"\u003eA compatible 25-inch setup may be appropriate for occasional larger timber, but it should not automatically be selected simply because the saw can support it.\u003c\/p\u003e\n\u003cp data-start=\"6661\" data-end=\"6674\"\u003eA longer bar:\u003c\/p\u003e\n\u003cul data-start=\"6676\" data-end=\"6873\"\u003e\n\u003cli data-section-id=\"70djfe\" data-start=\"6676\" data-end=\"6689\"\u003eAdds weight\u003c\/li\u003e\n\u003cli data-section-id=\"10eil3e\" data-start=\"6690\" data-end=\"6720\"\u003eIncreases cutting resistance\u003c\/li\u003e\n\u003cli data-section-id=\"16oqi98\" data-start=\"6721\" data-end=\"6757\"\u003eRequires careful chain maintenance\u003c\/li\u003e\n\u003cli data-section-id=\"2fape5\" data-start=\"6758\" data-end=\"6785\"\u003eChanges the saw’s balance\u003c\/li\u003e\n\u003cli data-section-id=\"1ywrrhe\" data-start=\"6786\" data-end=\"6830\"\u003ePlaces greater demand on the oiling system\u003c\/li\u003e\n\u003cli data-section-id=\"e40vsg\" data-start=\"6831\" data-end=\"6873\"\u003eMay reduce cutting speed in smaller wood\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"6875\" data-end=\"7004\"\u003eCustomers who regularly require a 25-inch bar may be better served by a professional model with a stronger power-to-weight ratio.\u003c\/p\u003e\n\u003ch2 data-section-id=\"t1fl42\" data-start=\"7006\" data-end=\"7027\"\u003eSTIHL 2-MIX Engine\u003c\/h2\u003e\n\u003cp data-start=\"7029\" data-end=\"7099\"\u003eThe MS 391 uses STIHL’s \u003cstrong data-start=\"7053\" data-end=\"7098\"\u003e2-MIX stratified-scavenging engine design\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"7101\" data-end=\"7348\"\u003eDuring operation, a layer of fresh air separates burned exhaust gases from the incoming fuel mixture. STIHL uses this design to reduce fuel loss through the exhaust while maintaining strong engine performance. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"7350\" data-end=\"7460\"\u003eThe engine still requires gasoline mixed with the correct two-cycle oil. Straight gasoline must never be used.\u003c\/p\u003e\n\u003cp data-start=\"7462\" data-end=\"7613\"\u003eFuel quality is especially important for farm and acreage saws that may sit unused between cutting seasons. Old or contaminated fuel can contribute to:\u003c\/p\u003e\n\u003cul data-start=\"7615\" data-end=\"7745\"\u003e\n\u003cli data-section-id=\"hb2z6f\" data-start=\"7615\" data-end=\"7630\"\u003eHard starting\u003c\/li\u003e\n\u003cli data-section-id=\"1cocvjc\" data-start=\"7631\" data-end=\"7650\"\u003ePoor acceleration\u003c\/li\u003e\n\u003cli data-section-id=\"141ioqi\" data-start=\"7651\" data-end=\"7666\"\u003eUnstable idle\u003c\/li\u003e\n\u003cli data-section-id=\"1g41bea\" data-start=\"7667\" data-end=\"7688\"\u003eCarburetor deposits\u003c\/li\u003e\n\u003cli data-section-id=\"s8yil6\" data-start=\"7689\" data-end=\"7717\"\u003eReduced engine performance\u003c\/li\u003e\n\u003cli data-section-id=\"q16nch\" data-start=\"7718\" data-end=\"7745\"\u003eFuel-system deterioration\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"7747\" data-end=\"7853\"\u003eFor owners who use the saw intermittently, STIHL MotoMix can simplify fuel handling and long-term storage.\u003c\/p\u003e\n\u003ch2 data-section-id=\"zuk7ym\" data-start=\"7855\" data-end=\"7889\"\u003eLong-Life Air-Filtration System\u003c\/h2\u003e\n\u003cp data-start=\"7891\" data-end=\"7951\"\u003eThe MS 391 includes STIHL’s long-life air-filtration system.\u003c\/p\u003e\n\u003cp data-start=\"7953\" data-end=\"8252\"\u003ePre-separation removes larger dust and sawdust particles before they reach the primary filter. This helps slow filter contamination and extend the time between cleaning intervals. STIHL highlights the long-life filtration system as a core feature of the MS 391. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"8254\" data-end=\"8297\"\u003eThis is particularly valuable when cutting:\u003c\/p\u003e\n\u003cul data-start=\"8299\" data-end=\"8448\"\u003e\n\u003cli data-section-id=\"18w7s30\" data-start=\"8299\" data-end=\"8313\"\u003eDry firewood\u003c\/li\u003e\n\u003cli data-section-id=\"1nmu6zx\" data-start=\"8314\" data-end=\"8340\"\u003eDead or weathered timber\u003c\/li\u003e\n\u003cli data-section-id=\"1uonfs0\" data-start=\"8341\" data-end=\"8353\"\u003eDirty bark\u003c\/li\u003e\n\u003cli data-section-id=\"1yc1vb3\" data-start=\"8354\" data-end=\"8380\"\u003eWindfall near the ground\u003c\/li\u003e\n\u003cli data-section-id=\"q9ki28\" data-start=\"8381\" data-end=\"8402\"\u003eConstruction timber\u003c\/li\u003e\n\u003cli data-section-id=\"ar6era\" data-start=\"8403\" data-end=\"8448\"\u003eWood during dry Southern Alberta conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"8450\" data-end=\"8637\"\u003eThe filtration system still requires regular inspection. A heavily restricted, damaged, or incorrectly installed filter can reduce performance and allow abrasive material into the engine.\u003c\/p\u003e\n\u003ch2 data-section-id=\"1e5ik6w\" data-start=\"8639\" data-end=\"8671\"\u003eCompensator Carburetor System\u003c\/h2\u003e\n\u003cp data-start=\"8673\" data-end=\"8813\"\u003eThe MS 391 uses STIHL’s compensator system to help maintain a consistent fuel-to-air ratio as the air filter gradually becomes contaminated.\u003c\/p\u003e\n\u003cp data-start=\"8815\" data-end=\"8974\"\u003eThis can help preserve engine performance and fuel economy between filter services. The compensator does not eliminate the need to inspect or clean the filter.\u003c\/p\u003e\n\u003cp data-start=\"8976\" data-end=\"8999\"\u003eIt also cannot correct:\u003c\/p\u003e\n\u003cul data-start=\"9001\" data-end=\"9152\"\u003e\n\u003cli data-section-id=\"qrexwd\" data-start=\"9001\" data-end=\"9013\"\u003eStale fuel\u003c\/li\u003e\n\u003cli data-section-id=\"1s6d00x\" data-start=\"9014\" data-end=\"9038\"\u003eIncorrect fuel mixture\u003c\/li\u003e\n\u003cli data-section-id=\"1mjk43g\" data-start=\"9039\" data-end=\"9061\"\u003eA damaged air filter\u003c\/li\u003e\n\u003cli data-section-id=\"g3sqni\" data-start=\"9062\" data-end=\"9088\"\u003eBlocked cooling passages\u003c\/li\u003e\n\u003cli data-section-id=\"10nqqfp\" data-start=\"9089\" data-end=\"9103\"\u003eA dull chain\u003c\/li\u003e\n\u003cli data-section-id=\"1wol5nm\" data-start=\"9104\" data-end=\"9121\"\u003eMechanical wear\u003c\/li\u003e\n\u003cli data-section-id=\"w0o7bc\" data-start=\"9122\" data-end=\"9152\"\u003eInadequate chain lubrication\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"9154\" data-end=\"9243\"\u003eThe system extends useful operating intervals, but routine maintenance remains essential.\u003c\/p\u003e\n\u003ch2 data-section-id=\"vqp592\" data-start=\"9245\" data-end=\"9277\"\u003eSide-Mounted Chain Tensioning\u003c\/h2\u003e\n\u003cp data-start=\"9279\" data-end=\"9324\"\u003eThe MS 391 uses side-access chain tensioning.\u003c\/p\u003e\n\u003cp data-start=\"9326\" data-end=\"9601\"\u003eThe adjustment screw can be reached from the side of the powerhead using the combination wrench, reducing the need to work near the front of the guide bar. STIHL lists side-access tensioning among the saw’s standard convenience features. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"9603\" data-end=\"9635\"\u003eChain tension should be checked:\u003c\/p\u003e\n\u003cul data-start=\"9637\" data-end=\"9822\"\u003e\n\u003cli data-section-id=\"bzoe5r\" data-start=\"9637\" data-end=\"9655\"\u003eBefore every use\u003c\/li\u003e\n\u003cli data-section-id=\"hdb0m5\" data-start=\"9656\" data-end=\"9686\"\u003eAfter installing a new chain\u003c\/li\u003e\n\u003cli data-section-id=\"1c9xa2y\" data-start=\"9687\" data-end=\"9713\"\u003eAfter the first few cuts\u003c\/li\u003e\n\u003cli data-section-id=\"1j1e0gz\" data-start=\"9714\" data-end=\"9747\"\u003ePeriodically as the chain warms\u003c\/li\u003e\n\u003cli data-section-id=\"k5qoec\" data-start=\"9748\" data-end=\"9771\"\u003eAfter the chain cools\u003c\/li\u003e\n\u003cli data-section-id=\"5gngb3\" data-start=\"9772\" data-end=\"9822\"\u003eWhenever the chain begins to sag beneath the bar\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"9824\" data-end=\"9921\"\u003eThe engine must be shut off before adjustment, and gloves should be worn when handling the chain.\u003c\/p\u003e\n\u003ch2 data-section-id=\"vhsb8e\" data-start=\"9923\" data-end=\"9953\"\u003eTool-Free Fuel and Oil Caps\u003c\/h2\u003e\n\u003cp data-start=\"9955\" data-end=\"10062\"\u003eThe MS 391 includes tool-free fuel and chain-oil caps with retainers. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"10064\" data-end=\"10193\"\u003eThese make refuelling and oil filling more convenient, but each cap must be properly seated and locked before the saw is started.\u003c\/p\u003e\n\u003cp data-start=\"10195\" data-end=\"10234\"\u003eBefore returning to work, confirm that:\u003c\/p\u003e\n\u003cul data-start=\"10236\" data-end=\"10407\"\u003e\n\u003cli data-section-id=\"129t7fl\" data-start=\"10236\" data-end=\"10261\"\u003eThe cap is fully closed\u003c\/li\u003e\n\u003cli data-section-id=\"14fp0u8\" data-start=\"10262\" data-end=\"10292\"\u003eThe sealing surface is clean\u003c\/li\u003e\n\u003cli data-section-id=\"14wdtj8\" data-start=\"10293\" data-end=\"10327\"\u003eNo fuel has spilled onto the saw\u003c\/li\u003e\n\u003cli data-section-id=\"1g5gh5v\" data-start=\"10328\" data-end=\"10352\"\u003eThe cap is not damaged\u003c\/li\u003e\n\u003cli data-section-id=\"xjg4lc\" data-start=\"10353\" data-end=\"10407\"\u003eThe saw has been moved away from the refuelling area\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"10409\" data-end=\"10473\"\u003eA damaged or incorrectly installed cap can leak fuel or bar oil.\u003c\/p\u003e\n\u003ch2 data-section-id=\"1w7uxd3\" data-start=\"10475\" data-end=\"10505\"\u003eSTIHL Anti-Vibration System\u003c\/h2\u003e\n\u003cp data-start=\"10507\" data-end=\"10692\"\u003eThe MS 391 uses an advanced anti-vibration system to reduce the amount of engine and cutting vibration transferred into the front and rear handles. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"10694\" data-end=\"10777\"\u003eThis can improve comfort during long firewood sessions and repetitive bucking work.\u003c\/p\u003e\n\u003cp data-start=\"10779\" data-end=\"11047\"\u003eReduced vibration does not eliminate fatigue. At over six kilograms before adding fuel, bar, chain, and oil, the MS 391 is still a substantial saw. Operators should take regular breaks and stop before fatigue begins to affect grip, balance, judgment, or reaction time.\u003c\/p\u003e\n\u003ch2 data-section-id=\"1fx8xi6\" data-start=\"11049\" data-end=\"11077\"\u003eSTIHL Chainsaw Comparison\u003c\/h2\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable data-start=\"11079\" data-end=\"12586\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"11079\" data-end=\"11175\"\u003e\n\u003ctr data-start=\"11079\" data-end=\"11175\"\u003e\n\u003cth data-start=\"11079\" data-end=\"11087\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eModel\u003c\/th\u003e\n\u003cth data-start=\"11087\" data-end=\"11102\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eDisplacement\u003c\/th\u003e\n\u003cth data-start=\"11102\" data-end=\"11110\" data-col-size=\"sm\" class=\"last:pe-10\"\u003ePower\u003c\/th\u003e\n\u003cth data-start=\"11110\" data-end=\"11137\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eApprox. Powerhead Weight\u003c\/th\u003e\n\u003cth data-start=\"11137\" data-end=\"11156\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eCommon Bar Range\u003c\/th\u003e\n\u003cth data-start=\"11156\" data-end=\"11175\" data-col-size=\"md\" class=\"last:pe-10\"\u003eBest Suited For\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"11206\" data-end=\"12586\"\u003e\n\u003ctr data-start=\"11206\" data-end=\"11399\"\u003e\n\u003ctd data-start=\"11206\" data-end=\"11289\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"11208\" data-end=\"11288\"\u003e\u003ca data-start=\"11210\" data-end=\"11286\" rel=\"noopener\" class=\"decorated-link\" href=\"https:\/\/arns.ca\/products\/stihl%C2%AE-ms-362-c-m-chainsaw\"\u003eSTIHL MS 362 C-M\u003c\/a\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"11289\" data-end=\"11297\" data-col-size=\"sm\"\u003e59 cc\u003c\/td\u003e\n\u003ctd data-start=\"11297\" data-end=\"11315\" data-col-size=\"sm\"\u003e3.5 kW \/ 4.7 hp\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"11315\" data-end=\"11324\"\u003e5.6 kg\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-start=\"11324\" data-end=\"11337\"\u003e16\" to 25\"\u003c\/td\u003e\n\u003ctd data-col-size=\"md\" data-start=\"11337\" data-end=\"11399\"\u003eProfessional forestry, regular firewood, and medium timber\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"11400\" data-end=\"11585\"\u003e\n\u003ctd data-start=\"11400\" data-end=\"11466\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"11402\" data-end=\"11465\"\u003e\u003ca data-start=\"11404\" data-end=\"11463\" rel=\"noopener\" class=\"decorated-link\" href=\"https:\/\/arns.ca\/products\/stihl%C2%AE-ms-391\"\u003eSTIHL MS 391\u003c\/a\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"11466\" data-end=\"11476\" data-col-size=\"sm\"\u003e64.1 cc\u003c\/td\u003e\n\u003ctd data-start=\"11476\" data-end=\"11494\" data-col-size=\"sm\"\u003e3.3 kW \/ 4.5 hp\u003c\/td\u003e\n\u003ctd data-start=\"11494\" data-end=\"11511\" data-col-size=\"sm\"\u003eApprox. 6.2 kg\u003c\/td\u003e\n\u003ctd data-start=\"11511\" data-end=\"11524\" data-col-size=\"sm\"\u003e16\" to 25\"\u003c\/td\u003e\n\u003ctd data-start=\"11524\" data-end=\"11585\" data-col-size=\"md\"\u003eFarms, acreages, construction timber, and larger firewood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"11586\" data-end=\"11788\"\u003e\n\u003ctd data-start=\"11586\" data-end=\"11656\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"11588\" data-end=\"11655\"\u003e\u003ca data-start=\"11590\" data-end=\"11653\" rel=\"noopener\" class=\"decorated-link\" href=\"https:\/\/arns.ca\/collections\/stihl-chainsaws?utm_source=chatgpt.com\"\u003eSTIHL MS 400 C-M\u003c\/a\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"11656\" data-end=\"11672\" data-col-size=\"sm\"\u003eApprox. 67 cc\u003c\/td\u003e\n\u003ctd data-start=\"11672\" data-end=\"11687\" data-col-size=\"sm\"\u003eApprox. 4 kW\u003c\/td\u003e\n\u003ctd data-start=\"11687\" data-end=\"11704\" data-col-size=\"sm\"\u003eApprox. 5.8 kg\u003c\/td\u003e\n\u003ctd data-start=\"11704\" data-end=\"11726\" data-col-size=\"sm\"\u003eCommonly 18\" to 25\"\u003c\/td\u003e\n\u003ctd data-start=\"11726\" data-end=\"11788\" data-col-size=\"md\"\u003eProfessional forestry requiring more torque and production\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"11789\" data-end=\"11971\"\u003e\n\u003ctd data-start=\"11789\" data-end=\"11859\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"11791\" data-end=\"11858\"\u003e\u003ca data-start=\"11793\" data-end=\"11856\" rel=\"noopener\" class=\"decorated-link\" href=\"https:\/\/arns.ca\/collections\/stihl-chainsaws?utm_source=chatgpt.com\"\u003eSTIHL MS 462 C-M\u003c\/a\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"11859\" data-end=\"11875\" data-col-size=\"sm\"\u003eApprox. 72 cc\u003c\/td\u003e\n\u003ctd data-start=\"11875\" data-end=\"11892\" data-col-size=\"sm\"\u003eApprox. 4.4 kW\u003c\/td\u003e\n\u003ctd data-start=\"11892\" data-end=\"11907\" data-col-size=\"sm\"\u003eApprox. 6 kg\u003c\/td\u003e\n\u003ctd data-start=\"11907\" data-end=\"11929\" data-col-size=\"sm\"\u003eCommonly 20\" to 32\"\u003c\/td\u003e\n\u003ctd data-start=\"11929\" data-end=\"11971\" data-col-size=\"md\"\u003eProfessional felling and larger timber\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"11972\" data-end=\"12155\"\u003e\n\u003ctd data-start=\"11972\" data-end=\"12040\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"11974\" data-end=\"12039\"\u003e\u003ca data-start=\"11976\" data-end=\"12037\" rel=\"noopener\" class=\"decorated-link\" href=\"https:\/\/arns.ca\/products\/stihl%C2%AE-ms-500i\"\u003eSTIHL MS 500i\u003c\/a\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"12040\" data-end=\"12050\" data-col-size=\"sm\"\u003e79.2 cc\u003c\/td\u003e\n\u003ctd data-start=\"12050\" data-end=\"12065\" data-col-size=\"sm\"\u003eApprox. 5 kW\u003c\/td\u003e\n\u003ctd data-start=\"12065\" data-end=\"12082\" data-col-size=\"sm\"\u003eApprox. 6.2 kg\u003c\/td\u003e\n\u003ctd data-start=\"12082\" data-end=\"12104\" data-col-size=\"sm\"\u003eCommonly 20\" to 36\"\u003c\/td\u003e\n\u003ctd data-start=\"12104\" data-end=\"12155\" data-col-size=\"md\"\u003eHigh-production forestry and rapid acceleration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"12156\" data-end=\"12366\"\u003e\n\u003ctd data-start=\"12156\" data-end=\"12239\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"12158\" data-end=\"12238\"\u003e\u003ca data-start=\"12160\" data-end=\"12236\" rel=\"noopener\" class=\"decorated-link\" href=\"https:\/\/arns.ca\/products\/stihl%C2%AE-ms-661-c-m-chainsaw\"\u003eSTIHL MS 661 C-M\u003c\/a\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"12239\" data-end=\"12249\" data-col-size=\"sm\"\u003e91.1 cc\u003c\/td\u003e\n\u003ctd data-start=\"12249\" data-end=\"12266\" data-col-size=\"sm\"\u003eApprox. 5.4 kW\u003c\/td\u003e\n\u003ctd data-start=\"12266\" data-end=\"12283\" data-col-size=\"sm\"\u003eApprox. 7.5 kg\u003c\/td\u003e\n\u003ctd data-start=\"12283\" data-end=\"12305\" data-col-size=\"sm\"\u003eCommonly 28\" to 36\"\u003c\/td\u003e\n\u003ctd data-start=\"12305\" data-end=\"12366\" data-col-size=\"md\"\u003eLarge timber, milling, and demanding professional felling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"12367\" data-end=\"12586\"\u003e\n\u003ctd data-start=\"12367\" data-end=\"12435\" data-col-size=\"sm\"\u003e\u003cstrong data-start=\"12369\" data-end=\"12434\"\u003e\u003ca data-start=\"12371\" data-end=\"12432\" rel=\"noopener\" class=\"decorated-link\" href=\"https:\/\/arns.ca\/products\/ms-881-wrap-w-41-b-c?utm_source=chatgpt.com\"\u003eSTIHL MS 881\u003c\/a\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd data-start=\"12435\" data-end=\"12446\" data-col-size=\"sm\"\u003e121.6 cc\u003c\/td\u003e\n\u003ctd data-start=\"12446\" data-end=\"12463\" data-col-size=\"sm\"\u003eApprox. 6.4 kW\u003c\/td\u003e\n\u003ctd data-start=\"12463\" data-end=\"12479\" data-col-size=\"sm\"\u003eApprox. 10 kg\u003c\/td\u003e\n\u003ctd data-start=\"12479\" data-end=\"12516\" data-col-size=\"sm\"\u003e41\" and specialized configurations\u003c\/td\u003e\n\u003ctd data-start=\"12516\" data-end=\"12586\" data-col-size=\"md\"\u003eVery large timber, heavy milling, and specialized professional use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp data-start=\"12588\" data-end=\"12780\"\u003eThe MS 391 is the only farm and acreage model in this comparison. The remaining saws are professional models designed around stronger power-to-weight, higher production, and more frequent use.\u003c\/p\u003e\n\u003ch2 data-section-id=\"7fqtt1\" data-start=\"12782\" data-end=\"12811\"\u003eSTIHL MS 391 vs MS 362 C-M\u003c\/h2\u003e\n\u003cp data-start=\"12813\" data-end=\"12998\"\u003eThe MS 391 and \u003cstrong data-start=\"12828\" data-end=\"12902\"\u003e\u003ca data-start=\"12830\" data-end=\"12900\" rel=\"noopener\" class=\"decorated-link\" href=\"https:\/\/arns.ca\/products\/stihl%C2%AE-ms-362-c-m-chainsaw\"\u003eMS 362 C-M\u003c\/a\u003e\u003c\/strong\u003e are close in displacement but substantially different in construction and operating experience.\u003c\/p\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable data-start=\"13000\" data-end=\"13513\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"13000\" data-end=\"13051\"\u003e\n\u003ctr data-start=\"13000\" data-end=\"13051\"\u003e\n\u003cth data-start=\"13000\" data-end=\"13016\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eConsideration\u003c\/th\u003e\n\u003cth data-start=\"13016\" data-end=\"13031\" data-col-size=\"md\" class=\"last:pe-10\"\u003eSTIHL MS 391\u003c\/th\u003e\n\u003cth data-start=\"13031\" data-end=\"13051\" data-col-size=\"md\" class=\"last:pe-10\"\u003eSTIHL MS 362 C-M\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"13066\" data-end=\"13513\"\u003e\n\u003ctr data-start=\"13066\" data-end=\"13100\"\u003e\n\u003ctd data-start=\"13066\" data-end=\"13081\" data-col-size=\"sm\"\u003eDisplacement\u003c\/td\u003e\n\u003ctd data-start=\"13081\" data-end=\"13091\" data-col-size=\"md\"\u003e64.1 cc\u003c\/td\u003e\n\u003ctd data-start=\"13091\" data-end=\"13100\" data-col-size=\"md\"\u003e59 cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"13101\" data-end=\"13146\"\u003e\n\u003ctd data-start=\"13101\" data-end=\"13109\" data-col-size=\"sm\"\u003ePower\u003c\/td\u003e\n\u003ctd data-start=\"13109\" data-end=\"13127\" data-col-size=\"md\"\u003e3.3 kW \/ 4.5 hp\u003c\/td\u003e\n\u003ctd data-start=\"13127\" data-end=\"13146\" data-col-size=\"md\"\u003e3.5 kW \/ 4.7 hp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"13147\" data-end=\"13193\"\u003e\n\u003ctd data-start=\"13147\" data-end=\"13174\" data-col-size=\"sm\"\u003eApprox. powerhead weight\u003c\/td\u003e\n\u003ctd data-start=\"13174\" data-end=\"13183\" data-col-size=\"md\"\u003e6.2 kg\u003c\/td\u003e\n\u003ctd data-start=\"13183\" data-end=\"13193\" data-col-size=\"md\"\u003e5.6 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"13194\" data-end=\"13258\"\u003e\n\u003ctd data-start=\"13194\" data-end=\"13214\" data-col-size=\"sm\"\u003eEngine management\u003c\/td\u003e\n\u003ctd data-start=\"13214\" data-end=\"13240\" data-col-size=\"md\"\u003eConventional carburetor\u003c\/td\u003e\n\u003ctd data-start=\"13240\" data-end=\"13258\" data-col-size=\"md\"\u003eSTIHL M-Tronic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"13259\" data-end=\"13309\"\u003e\n\u003ctd data-start=\"13259\" data-end=\"13274\" data-col-size=\"sm\"\u003eConstruction\u003c\/td\u003e\n\u003ctd data-start=\"13274\" data-end=\"13293\" data-col-size=\"md\"\u003eFarm and acreage\u003c\/td\u003e\n\u003ctd data-start=\"13293\" data-end=\"13309\" data-col-size=\"md\"\u003eProfessional\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"13310\" data-end=\"13397\"\u003e\n\u003ctd data-start=\"13310\" data-end=\"13327\" data-col-size=\"sm\"\u003eMain advantage\u003c\/td\u003e\n\u003ctd data-start=\"13327\" data-end=\"13366\" data-col-size=\"md\"\u003eStrong displacement at a lower price\u003c\/td\u003e\n\u003ctd data-start=\"13366\" data-end=\"13397\" data-col-size=\"md\"\u003eMore power with less weight\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"13398\" data-end=\"13513\"\u003e\n\u003ctd data-start=\"13398\" data-end=\"13409\" data-col-size=\"sm\"\u003eBest use\u003c\/td\u003e\n\u003ctd data-start=\"13409\" data-end=\"13457\" data-col-size=\"md\"\u003eFirewood, rural work, and construction timber\u003c\/td\u003e\n\u003ctd data-start=\"13457\" data-end=\"13513\" data-col-size=\"md\"\u003eFrequent professional forestry and demanding cutting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp data-start=\"13515\" data-end=\"13610\"\u003eThe MS 391 has the larger engine, but the MS 362 C-M produces more rated power and weighs less.\u003c\/p\u003e\n\u003cp data-start=\"13612\" data-end=\"13645\"\u003eWe recommend the \u003cstrong data-start=\"13629\" data-end=\"13639\"\u003eMS 391\u003c\/strong\u003e when:\u003c\/p\u003e\n\u003cul data-start=\"13647\" data-end=\"13867\"\u003e\n\u003cli data-section-id=\"mfma68\" data-start=\"13647\" data-end=\"13671\"\u003ePurchase value matters\u003c\/li\u003e\n\u003cli data-section-id=\"lollhi\" data-start=\"13672\" data-end=\"13718\"\u003eThe saw is used seasonally rather than daily\u003c\/li\u003e\n\u003cli data-section-id=\"1pqpxh7\" data-start=\"13719\" data-end=\"13779\"\u003eFirewood and rural property work are the main applications\u003c\/li\u003e\n\u003cli data-section-id=\"1an1pb7\" data-start=\"13780\" data-end=\"13833\"\u003eThe customer prefers conventional engine management\u003c\/li\u003e\n\u003cli data-section-id=\"fb77hd\" data-start=\"13834\" data-end=\"13867\"\u003eAdditional weight is acceptable\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"13869\" data-end=\"13906\"\u003eWe recommend the \u003cstrong data-start=\"13886\" data-end=\"13900\"\u003eMS 362 C-M\u003c\/strong\u003e when:\u003c\/p\u003e\n\u003cul data-start=\"13908\" data-end=\"14173\"\u003e\n\u003cli data-section-id=\"1hrjx71\" data-start=\"13908\" data-end=\"13960\"\u003eThe saw will be carried or used throughout the day\u003c\/li\u003e\n\u003cli data-section-id=\"1dkv7f3\" data-start=\"13961\" data-end=\"13999\"\u003eProfessional power-to-weight matters\u003c\/li\u003e\n\u003cli data-section-id=\"gujwfa\" data-start=\"14000\" data-end=\"14062\"\u003eWork takes place across changing temperatures and elevations\u003c\/li\u003e\n\u003cli data-section-id=\"4hkxui\" data-start=\"14063\" data-end=\"14132\"\u003eFaster acceleration and reduced fatigue justify the additional cost\u003c\/li\u003e\n\u003cli data-section-id=\"jcn7l2\" data-start=\"14133\" data-end=\"14173\"\u003eM-Tronic engine management is valuable\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"14175\" data-end=\"14272\"\u003eThe larger displacement of the MS 391 does not automatically make it the stronger-performing saw.\u003c\/p\u003e\n\u003ch2 data-section-id=\"1lgmgkr\" data-start=\"14274\" data-end=\"14299\"\u003eSTIHL MS 391 vs MS 291\u003c\/h2\u003e\n\u003cp data-start=\"14301\" data-end=\"14413\"\u003eThe MS 391 provides a substantial step up from the \u003cstrong data-start=\"14352\" data-end=\"14412\"\u003e\u003ca data-start=\"14354\" data-end=\"14410\" rel=\"noopener\" class=\"decorated-link\" href=\"https:\/\/arns.ca\/products\/stihl-ms-291-chainsaw\"\u003eMS 291\u003c\/a\u003e\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable data-start=\"14415\" data-end=\"14861\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"14415\" data-end=\"14462\"\u003e\n\u003ctr data-start=\"14415\" data-end=\"14462\"\u003e\n\u003cth data-start=\"14415\" data-end=\"14431\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eConsideration\u003c\/th\u003e\n\u003cth data-start=\"14431\" data-end=\"14446\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eSTIHL MS 291\u003c\/th\u003e\n\u003cth data-start=\"14446\" data-end=\"14462\" data-col-size=\"sm\" class=\"last:pe-10\"\u003eSTIHL MS 391\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"14477\" data-end=\"14861\"\u003e\n\u003ctr data-start=\"14477\" data-end=\"14513\"\u003e\n\u003ctd data-start=\"14477\" data-end=\"14492\" data-col-size=\"sm\"\u003eDisplacement\u003c\/td\u003e\n\u003ctd data-start=\"14492\" data-end=\"14502\" data-col-size=\"sm\"\u003e55.5 cc\u003c\/td\u003e\n\u003ctd data-start=\"14502\" data-end=\"14513\" data-col-size=\"sm\"\u003e64.1 cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"14514\" data-end=\"14559\"\u003e\n\u003ctd data-start=\"14514\" data-end=\"14522\" data-col-size=\"sm\"\u003ePower\u003c\/td\u003e\n\u003ctd data-start=\"14522\" data-end=\"14540\" data-col-size=\"sm\"\u003e2.8 kW \/ 3.8 hp\u003c\/td\u003e\n\u003ctd data-start=\"14540\" data-end=\"14559\" data-col-size=\"sm\"\u003e3.3 kW \/ 4.5 hp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"14560\" data-end=\"14606\"\u003e\n\u003ctd data-start=\"14560\" data-end=\"14587\" data-col-size=\"sm\"\u003eApprox. powerhead weight\u003c\/td\u003e\n\u003ctd data-start=\"14587\" data-end=\"14596\" data-col-size=\"sm\"\u003e5.6 kg\u003c\/td\u003e\n\u003ctd data-start=\"14596\" data-end=\"14606\" data-col-size=\"sm\"\u003e6.2 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"14607\" data-end=\"14695\"\u003e\n\u003ctd data-start=\"14607\" data-end=\"14622\" data-col-size=\"sm\"\u003ePrimary role\u003c\/td\u003e\n\u003ctd data-start=\"14622\" data-end=\"14653\" data-col-size=\"sm\"\u003eGeneral acreage and firewood\u003c\/td\u003e\n\u003ctd data-start=\"14653\" data-end=\"14695\" data-col-size=\"sm\"\u003eLarger firewood and heavier rural work\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"14696\" data-end=\"14781\"\u003e\n\u003ctd data-start=\"14696\" data-end=\"14713\" data-col-size=\"sm\"\u003eMain advantage\u003c\/td\u003e\n\u003ctd data-start=\"14713\" data-end=\"14753\" data-col-size=\"sm\"\u003eBetter balance for broad property use\u003c\/td\u003e\n\u003ctd data-start=\"14753\" data-end=\"14781\" data-col-size=\"sm\"\u003eMore torque and capacity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"14782\" data-end=\"14861\"\u003e\n\u003ctd data-start=\"14782\" data-end=\"14793\" data-col-size=\"sm\"\u003eBest use\u003c\/td\u003e\n\u003ctd data-start=\"14793\" data-end=\"14824\" data-col-size=\"sm\"\u003eRegular medium-sized cutting\u003c\/td\u003e\n\u003ctd data-start=\"14824\" data-end=\"14861\" data-col-size=\"sm\"\u003eLarger logs and sustained cutting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp data-start=\"14863\" data-end=\"14941\"\u003eThe MS 291 remains easier to handle and is sufficient for many acreage owners.\u003c\/p\u003e\n\u003cp data-start=\"14943\" data-end=\"15084\"\u003eThe MS 391 becomes worthwhile when larger wood, higher firewood volume, or longer cutting sessions regularly expose the limits of the MS 291.\u003c\/p\u003e\n\u003cp data-start=\"15086\" data-end=\"15284\"\u003eCustomers should not step up solely because the MS 391 is more powerful. The additional output comes with more weight, higher fuel consumption, and a less agile feel during limbing and smaller work.\u003c\/p\u003e\n\u003ch2 data-section-id=\"spscme\" data-start=\"15286\" data-end=\"15315\"\u003eSTIHL MS 391 vs MS 400 C-M\u003c\/h2\u003e\n\u003cp data-start=\"15317\" data-end=\"15382\"\u003eThe MS 400 C-M is the next major step in professional capability.\u003c\/p\u003e\n\u003cp data-start=\"15384\" data-end=\"15582\"\u003eAlthough its displacement is only moderately greater, the MS 400 C-M is designed around professional power-to-weight, faster acceleration, electronic M-Tronic management, and sustained forestry use.\u003c\/p\u003e\n\u003cp data-start=\"15584\" data-end=\"15625\"\u003eThe \u003cstrong data-start=\"15588\" data-end=\"15598\"\u003eMS 391\u003c\/strong\u003e is the better choice when:\u003c\/p\u003e\n\u003cul data-start=\"15627\" data-end=\"15868\"\u003e\n\u003cli data-section-id=\"6rs6zk\" data-start=\"15627\" data-end=\"15691\"\u003eThe saw is used for seasonal firewood and property maintenance\u003c\/li\u003e\n\u003cli data-section-id=\"tnz71i\" data-start=\"15692\" data-end=\"15716\"\u003ePurchase price matters\u003c\/li\u003e\n\u003cli data-section-id=\"1diyr28\" data-start=\"15717\" data-end=\"15775\"\u003eThe operator does not need professional daily durability\u003c\/li\u003e\n\u003cli data-section-id=\"1ht49up\" data-start=\"15776\" data-end=\"15813\"\u003eConventional controls are preferred\u003c\/li\u003e\n\u003cli data-section-id=\"jnwizm\" data-start=\"15814\" data-end=\"15868\"\u003eThe saw will not be carried for long forestry shifts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"15870\" data-end=\"15915\"\u003eThe \u003cstrong data-start=\"15874\" data-end=\"15888\"\u003eMS 400 C-M\u003c\/strong\u003e is the better choice when:\u003c\/p\u003e\n\u003cul data-start=\"15917\" data-end=\"16165\"\u003e\n\u003cli data-section-id=\"13wwtyn\" data-start=\"15917\" data-end=\"15950\"\u003eProduction speed affects income\u003c\/li\u003e\n\u003cli data-section-id=\"18safit\" data-start=\"15951\" data-end=\"15997\"\u003eThe saw is used frequently or professionally\u003c\/li\u003e\n\u003cli data-section-id=\"1fa7h2h\" data-start=\"15998\" data-end=\"16038\"\u003eLarger timber is encountered regularly\u003c\/li\u003e\n\u003cli data-section-id=\"wm4tyr\" data-start=\"16039\" data-end=\"16080\"\u003eLower weight relative to output matters\u003c\/li\u003e\n\u003cli data-section-id=\"1u0f8ug\" data-start=\"16081\" data-end=\"16116\"\u003eM-Tronic management is beneficial\u003c\/li\u003e\n\u003cli data-section-id=\"1cua9nf\" data-start=\"16117\" data-end=\"16165\"\u003eAn 18-inch to 25-inch bar will be used heavily\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"16167\" data-end=\"16294\"\u003eThe MS 400 C-M is not simply a slightly larger MS 391. It is a professional machine intended for a different level of workload.\u003c\/p\u003e\n\u003ch2 data-section-id=\"w67fcy\" data-start=\"16296\" data-end=\"16336\"\u003eWhat to Know Before Buying the MS 391\u003c\/h2\u003e\n\u003ch3 data-section-id=\"k4we5\" data-start=\"16338\" data-end=\"16370\"\u003eIt is a heavy farm-class saw\u003c\/h3\u003e\n\u003cp data-start=\"16372\" data-end=\"16570\"\u003eThe MS 391 weighs approximately 6.2 kg before the guide bar, chain, fuel, and bar oil are added. It will feel substantially heavier than an MS 291 or MS 261 C-M during limbing and extended carrying.\u003c\/p\u003e\n\u003ch3 data-section-id=\"ri9z7m\" data-start=\"16572\" data-end=\"16634\"\u003eMore displacement does not mean more power than the MS 362\u003c\/h3\u003e\n\u003cp data-start=\"16636\" data-end=\"16771\"\u003eThe MS 391 has a larger engine than the MS 362 C-M, but the professional MS 362 produces slightly more rated power while weighing less.\u003c\/p\u003e\n\u003ch3 data-section-id=\"7ebjj8\" data-start=\"16773\" data-end=\"16802\"\u003eIt does not have M-Tronic\u003c\/h3\u003e\n\u003cp data-start=\"16804\" data-end=\"17000\"\u003eThe MS 391 uses conventional engine management. It does not automatically compensate for changes in elevation, temperature, or operating conditions in the same way as an M-Tronic professional saw.\u003c\/p\u003e\n\u003ch3 data-section-id=\"u8n7l6\" data-start=\"17002\" data-end=\"17041\"\u003eLong bars should match the workload\u003c\/h3\u003e\n\u003cp data-start=\"17043\" data-end=\"17189\"\u003eA 25-inch bar may be supported, but an 18-inch or 20-inch setup will usually feel faster and better balanced for common firewood and acreage work.\u003c\/p\u003e\n\u003ch3 data-section-id=\"x65zmq\" data-start=\"17191\" data-end=\"17217\"\u003eIt requires mixed fuel\u003c\/h3\u003e\n\u003cp data-start=\"17219\" data-end=\"17348\"\u003eThe engine operates on gasoline mixed with the correct two-cycle oil. Straight gasoline can cause rapid and severe engine damage.\u003c\/p\u003e\n\u003ch3 data-section-id=\"189n5sq\" data-start=\"17350\" data-end=\"17401\"\u003eIt is not designed for occasional light cleanup\u003c\/h3\u003e\n\u003cp data-start=\"17403\" data-end=\"17544\"\u003eCustomers cutting only small branches or occasional residential firewood will usually be better served by a lighter and less expensive model.\u003c\/p\u003e\n\u003ch2 data-section-id=\"pacbn3\" data-start=\"17546\" data-end=\"17565\"\u003eFuel and Bar Oil\u003c\/h2\u003e\n\u003cp data-start=\"17567\" data-end=\"17587\"\u003eThe MS 391 requires:\u003c\/p\u003e\n\u003cul data-start=\"17589\" data-end=\"17695\"\u003e\n\u003cli data-section-id=\"hxzdcz\" data-start=\"17589\" data-end=\"17639\"\u003eFresh gasoline mixed with suitable two-cycle oil\u003c\/li\u003e\n\u003cli data-section-id=\"ugcpct\" data-start=\"17640\" data-end=\"17695\"\u003eSeparate bar and chain oil for the cutting attachment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"17697\" data-end=\"17813\"\u003eFor seasonal users, STIHL MotoMix can simplify fuel storage and reduce problems associated with aging pump gasoline.\u003c\/p\u003e\n\u003cp data-start=\"17815\" data-end=\"17935\"\u003eCustomers mixing their own fuel should use suitable fresh gasoline and quality two-cycle oil at STIHL’s specified ratio.\u003c\/p\u003e\n\u003cp data-start=\"17937\" data-end=\"18066\"\u003eThe chain-oil level should be checked whenever the saw is refuelled. Running the saw without adequate lubrication can damage the:\u003c\/p\u003e\n\u003cul data-start=\"18068\" data-end=\"18133\"\u003e\n\u003cli data-section-id=\"suqdnn\" data-start=\"18068\" data-end=\"18079\"\u003eGuide bar\u003c\/li\u003e\n\u003cli data-section-id=\"14mlaow\" data-start=\"18080\" data-end=\"18091\"\u003eSaw chain\u003c\/li\u003e\n\u003cli data-section-id=\"ll9mhv\" data-start=\"18092\" data-end=\"18108\"\u003eDrive sprocket\u003c\/li\u003e\n\u003cli data-section-id=\"1wbo4d6\" data-start=\"18109\" data-end=\"18119\"\u003eOil pump\u003c\/li\u003e\n\u003cli data-section-id=\"13gm0ca\" data-start=\"18120\" data-end=\"18133\"\u003eClutch area\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"18135\" data-end=\"18239\"\u003eA longer guide bar may require closer attention to oil delivery and cleanliness of the bar-oil passages.\u003c\/p\u003e\n\u003ch2 data-section-id=\"n6rnk5\" data-start=\"18241\" data-end=\"18269\"\u003eChain Care and Sharpening\u003c\/h2\u003e\n\u003cp data-start=\"18271\" data-end=\"18350\"\u003eA sharp chain is essential to getting the expected performance from the MS 391.\u003c\/p\u003e\n\u003cp data-start=\"18352\" data-end=\"18406\"\u003eSigns that the cutting system needs attention include:\u003c\/p\u003e\n\u003cul data-start=\"18408\" data-end=\"18659\"\u003e\n\u003cli data-section-id=\"kqmieu\" data-start=\"18408\" data-end=\"18447\"\u003eFine sawdust instead of defined chips\u003c\/li\u003e\n\u003cli data-section-id=\"9ad8u1\" data-start=\"18448\" data-end=\"18462\"\u003eSlow cutting\u003c\/li\u003e\n\u003cli data-section-id=\"64bcdx\" data-start=\"18463\" data-end=\"18492\"\u003eThe saw pulling to one side\u003c\/li\u003e\n\u003cli data-section-id=\"11pf4e2\" data-start=\"18493\" data-end=\"18514\"\u003eIncreased vibration\u003c\/li\u003e\n\u003cli data-section-id=\"mk3wef\" data-start=\"18515\" data-end=\"18551\"\u003eSmoke despite adequate lubrication\u003c\/li\u003e\n\u003cli data-section-id=\"k7uedq\" data-start=\"18552\" data-end=\"18597\"\u003eHeavy pressure required to complete the cut\u003c\/li\u003e\n\u003cli data-section-id=\"1cblhhy\" data-start=\"18598\" data-end=\"18620\"\u003eUneven cutter length\u003c\/li\u003e\n\u003cli data-section-id=\"hx3ru6\" data-start=\"18621\" data-end=\"18659\"\u003eBlue discolouration on the guide bar\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"18661\" data-end=\"18754\"\u003eThe chain pitch, gauge, and drive-link count must match the installed guide bar and sprocket.\u003c\/p\u003e\n\u003cp data-start=\"18756\" data-end=\"19034\"\u003eReplacement chains, bars, files, bar oil, and related equipment can be found through the \u003cstrong data-start=\"18845\" data-end=\"18926\"\u003e\u003ca data-start=\"18847\" data-end=\"18924\" rel=\"noopener\" class=\"decorated-link\" href=\"https:\/\/arns.ca\/collections\/stihl-chainsaws?utm_source=chatgpt.com\"\u003eArns STIHL chainsaw collection\u003c\/a\u003e\u003c\/strong\u003e and \u003cstrong data-start=\"18931\" data-end=\"18995\"\u003e\u003ca data-start=\"18933\" data-end=\"18993\" rel=\"noopener\" class=\"decorated-link\" href=\"https:\/\/arns.ca\/collections\/chainsaws?utm_source=chatgpt.com\"\u003echainsaw collection\u003c\/a\u003e\u003c\/strong\u003e. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 data-section-id=\"3chde8\" data-start=\"19036\" data-end=\"19075\"\u003eMaintenance and STIHL Service Kit 13\u003c\/h2\u003e\n\u003cp data-start=\"19077\" data-end=\"19121\"\u003eRoutine maintenance for the MS 391 includes:\u003c\/p\u003e\n\u003cul data-start=\"19123\" data-end=\"19521\"\u003e\n\u003cli data-section-id=\"1hoe1p6\" data-start=\"19123\" data-end=\"19161\"\u003eCleaning or replacing the air filter\u003c\/li\u003e\n\u003cli data-section-id=\"a4djle\" data-start=\"19162\" data-end=\"19189\"\u003eInspecting the spark plug\u003c\/li\u003e\n\u003cli data-section-id=\"hnikf3\" data-start=\"19190\" data-end=\"19231\"\u003eReplacing the fuel filter when required\u003c\/li\u003e\n\u003cli data-section-id=\"ihme8k\" data-start=\"19232\" data-end=\"19263\"\u003eCleaning cooling-air passages\u003c\/li\u003e\n\u003cli data-section-id=\"rvshd1\" data-start=\"19264\" data-end=\"19290\"\u003eChecking the chain brake\u003c\/li\u003e\n\u003cli data-section-id=\"b63aug\" data-start=\"19291\" data-end=\"19336\"\u003eCleaning the guide-bar groove and oil holes\u003c\/li\u003e\n\u003cli data-section-id=\"o3387y\" data-start=\"19337\" data-end=\"19374\"\u003eRotating and dressing the guide bar\u003c\/li\u003e\n\u003cli data-section-id=\"1bslzm4\" data-start=\"19375\" data-end=\"19406\"\u003eInspecting the drive sprocket\u003c\/li\u003e\n\u003cli data-section-id=\"1smrz8e\" data-start=\"19407\" data-end=\"19436\"\u003eChecking the recoil starter\u003c\/li\u003e\n\u003cli data-section-id=\"e7a2sh\" data-start=\"19437\" data-end=\"19483\"\u003eExamining the fuel and oil systems for leaks\u003c\/li\u003e\n\u003cli data-section-id=\"1vre5gg\" data-start=\"19484\" data-end=\"19521\"\u003eSharpening and tensioning the chain\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"19523\" data-end=\"19768\"\u003eThe \u003cstrong data-start=\"19527\" data-end=\"19551\"\u003eSTIHL Service Kit 13\u003c\/strong\u003e is compatible with the MS 271, MS 291, MS 311, and MS 391. It contains common maintenance components for helping protect the engine from dirt and supporting reliable performance. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"19770\" data-end=\"19873\"\u003eMaintenance intervals should be shortened when the saw is used heavily or operated in dusty conditions.\u003c\/p\u003e\n\u003ch2 data-section-id=\"xfmr4k\" data-start=\"19875\" data-end=\"19894\"\u003eSeasonal Storage\u003c\/h2\u003e\n\u003cp data-start=\"19896\" data-end=\"19945\"\u003eBefore storing the MS 391 for an extended period:\u003c\/p\u003e\n\u003cul data-start=\"19947\" data-end=\"20293\"\u003e\n\u003cli data-section-id=\"vici2v\" data-start=\"19947\" data-end=\"20000\"\u003eClean sawdust from the powerhead and sprocket cover\u003c\/li\u003e\n\u003cli data-section-id=\"1gkqfc8\" data-start=\"20001\" data-end=\"20043\"\u003eClean the guide-bar groove and oil holes\u003c\/li\u003e\n\u003cli data-section-id=\"d8v6fm\" data-start=\"20044\" data-end=\"20075\"\u003eInspect and sharpen the chain\u003c\/li\u003e\n\u003cli data-section-id=\"1bhs9ga\" data-start=\"20076\" data-end=\"20115\"\u003eFollow STIHL’s fuel-storage procedure\u003c\/li\u003e\n\u003cli data-section-id=\"1ximuvx\" data-start=\"20116\" data-end=\"20140\"\u003eInspect the air filter\u003c\/li\u003e\n\u003cli data-section-id=\"kpp86a\" data-start=\"20141\" data-end=\"20175\"\u003eCheck for fuel and bar-oil leaks\u003c\/li\u003e\n\u003cli data-section-id=\"102p2u9\" data-start=\"20176\" data-end=\"20201\"\u003eFit the guide-bar cover\u003c\/li\u003e\n\u003cli data-section-id=\"z8oeg4\" data-start=\"20202\" data-end=\"20243\"\u003eStore the saw in a dry, secure location\u003c\/li\u003e\n\u003cli data-section-id=\"8ozoad\" data-start=\"20244\" data-end=\"20293\"\u003eKeep it away from children and ignition sources\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"20295\" data-end=\"20455\"\u003eA large farm saw stored with stale fuel, a dirty filter, or a dull chain is far more likely to create starting and performance problems when it is needed again.\u003c\/p\u003e\n\u003ch2 data-section-id=\"19yd3w1\" data-start=\"20457\" data-end=\"20475\"\u003eChainsaw Safety\u003c\/h2\u003e\n\u003cp data-start=\"20477\" data-end=\"20570\"\u003eThe MS 391 is a powerful saw intended for experienced users performing serious property work.\u003c\/p\u003e\n\u003cp data-start=\"20572\" data-end=\"20600\"\u003eOperators should understand:\u003c\/p\u003e\n\u003cul data-start=\"20602\" data-end=\"20917\"\u003e\n\u003cli data-section-id=\"1e3bjrj\" data-start=\"20602\" data-end=\"20635\"\u003eSafe ground-starting procedures\u003c\/li\u003e\n\u003cli data-section-id=\"1scoyoy\" data-start=\"20636\" data-end=\"20659\"\u003eChain-brake operation\u003c\/li\u003e\n\u003cli data-section-id=\"8e2d44\" data-start=\"20660\" data-end=\"20676\"\u003eKickback zones\u003c\/li\u003e\n\u003cli data-section-id=\"mcwqtc\" data-start=\"20677\" data-end=\"20715\"\u003eProper limbing and bucking technique\u003c\/li\u003e\n\u003cli data-section-id=\"1pntbgx\" data-start=\"20716\" data-end=\"20756\"\u003eCompression and tension in fallen wood\u003c\/li\u003e\n\u003cli data-section-id=\"1raxn1f\" data-start=\"20757\" data-end=\"20787\"\u003eEscape routes during felling\u003c\/li\u003e\n\u003cli data-section-id=\"164t4tq\" data-start=\"20788\" data-end=\"20855\"\u003eHazards associated with leaning, split, damaged, or hung-up trees\u003c\/li\u003e\n\u003cli data-section-id=\"1inoqxx\" data-start=\"20856\" data-end=\"20917\"\u003eThe additional balance changes created by longer guide bars\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"20919\" data-end=\"20961\"\u003eRecommended protective equipment includes:\u003c\/p\u003e\n\u003cul data-start=\"20963\" data-end=\"21188\"\u003e\n\u003cli data-section-id=\"ihadjx\" data-start=\"20963\" data-end=\"20999\"\u003eChainsaw protective pants or chaps\u003c\/li\u003e\n\u003cli data-section-id=\"14xdtiq\" data-start=\"21000\" data-end=\"21016\"\u003eEye protection\u003c\/li\u003e\n\u003cli data-section-id=\"1qnv3md\" data-start=\"21017\" data-end=\"21037\"\u003eHearing protection\u003c\/li\u003e\n\u003cli data-section-id=\"bdam65\" data-start=\"21038\" data-end=\"21057\"\u003eProtective gloves\u003c\/li\u003e\n\u003cli data-section-id=\"1er9k55\" data-start=\"21058\" data-end=\"21089\"\u003eChainsaw-appropriate footwear\u003c\/li\u003e\n\u003cli data-section-id=\"15apjb2\" data-start=\"21090\" data-end=\"21143\"\u003eA forestry helmet when overhead hazards are present\u003c\/li\u003e\n\u003cli data-section-id=\"1d25tzv\" data-start=\"21144\" data-end=\"21188\"\u003eHigh-visibility clothing where appropriate\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"21190\" data-end=\"21366\"\u003eFelling near homes, roads, utilities, fences, or neighbouring properties should be left to a qualified professional when the operator lacks the required training and equipment.\u003c\/p\u003e\n\u003ch2 data-section-id=\"mfaxtg\" data-start=\"21368\" data-end=\"21407\"\u003eWhy Buy Your STIHL MS 391 From Arns?\u003c\/h2\u003e\n\u003cp data-start=\"21409\" data-end=\"21625\"\u003eArns Equipment is a family-owned STIHL dealer serving Calgary, Southern Alberta, and customers across Canada. Our team brings more than 80 years of outdoor power equipment experience to every chainsaw recommendation.\u003c\/p\u003e\n\u003cp data-start=\"21627\" data-end=\"21746\"\u003eWhen you purchase the \u003cstrong data-start=\"21649\" data-end=\"21722\"\u003e\u003ca data-start=\"21651\" data-end=\"21720\" rel=\"noopener\" class=\"decorated-link\" href=\"https:\/\/arns.ca\/products\/stihl%C2%AE-ms-391\"\u003eSTIHL MS 391 from Arns\u003c\/a\u003e\u003c\/strong\u003e, our team can help you:\u003c\/p\u003e\n\u003cul data-start=\"21748\" data-end=\"22256\"\u003e\n\u003cli data-section-id=\"ky4mom\" data-start=\"21748\" data-end=\"21783\"\u003eChoose the right guide-bar length\u003c\/li\u003e\n\u003cli data-section-id=\"1k7rf59\" data-start=\"21784\" data-end=\"21835\"\u003eCompare the MS 391 with the MS 291 and MS 362 C-M\u003c\/li\u003e\n\u003cli data-section-id=\"1epev1a\" data-start=\"21836\" data-end=\"21905\"\u003eDecide whether a professional MS 400 C-M better suits your workload\u003c\/li\u003e\n\u003cli data-section-id=\"1lbbeos\" data-start=\"21906\" data-end=\"21980\"\u003eSelect compatible chains, files, fuel, bar oil, and protective equipment\u003c\/li\u003e\n\u003cli data-section-id=\"1dkpwi5\" data-start=\"21981\" data-end=\"22031\"\u003eUnderstand chain tension and routine maintenance\u003c\/li\u003e\n\u003cli data-section-id=\"rgj1pe\" data-start=\"22032\" data-end=\"22080\"\u003eFind replacement bars, chains, and accessories\u003c\/li\u003e\n\u003cli data-section-id=\"irf97x\" data-start=\"22081\" data-end=\"22140\"\u003eSource repair and maintenance parts through PartsHouse.ca\u003c\/li\u003e\n\u003cli data-section-id=\"i7egw5\" data-start=\"22141\" data-end=\"22204\"\u003eArrange local STIHL warranty support and professional service\u003c\/li\u003e\n\u003cli data-section-id=\"13yc70m\" data-start=\"22205\" data-end=\"22256\"\u003eAvoid buying a heavier saw than the work requires\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"22258\" data-end=\"22584\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eFor farmers, acreage owners, landscapers, tradespeople, and serious firewood cutters who need more capability than the MS 291 but do not require a professional forestry chassis, the \u003cstrong data-start=\"22440\" data-end=\"22583\"\u003eSTIHL MS 391 offers substantial displacement, strong cutting torque, proven serviceability, and dependable support for demanding rural work\u003c\/strong\u003e.\u003c\/p\u003e","brand":"Stihl","offers":[{"title":"16\"","offer_id":46119881343145,"sku":"'-MS391-16","price":899.99,"currency_code":"CAD","in_stock":true},{"title":"18\"","offer_id":47162364592297,"sku":"'-MS391-18","price":909.99,"currency_code":"CAD","in_stock":true},{"title":"20\"","offer_id":47162364625065,"sku":"MS 391 20\" BAR PETROL CHAINSAW-MS391-20","price":919.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0661\/5459\/4473\/files\/e0a54031-0205-4220-b972-7ed64c36707e.jpg?v=1747426918"}],"url":"https:\/\/arns.ca\/collections\/ms391-16-chainsaw.oembed","provider":"ARNS Equipment","version":"1.0","type":"link"}