valutazioni - 3, GPA: 4
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Facilità d'uso
For these reasons, each STIHL chainsaw should be returned to trained personnel such as your STIHL servicing dealer for periodic inspection and servicing of the brake system according to the following schedule: Heavy usage - every three months, Moderate usage twice a year, Occasional usage - annually. The chainsaw should also be returned immediately for maintenance whenever the brake system cannot be thoroughly cleaned or there is a change in its operating characteristics. For any maintenance please refer to the maintenance chart and to the warranty statement near the end of this manual. The daily maintenance schedule for your chainsaw set forth in your STIHL owner's manual should be strictly followed. Store chainsaw in a dry and secure place and away from children. Before storing for longer than a few days, always empty the fuel tank. MS 191 T 21 English / USA Mounting the Bar and Chain (Front Chain Tensioner) 001BA105 KN 1 2 3 a t = a : 2 001BA127 KN001BA108 KN 6 You can run chains of different pitches : Unscrew the nut and remove the : Disengage the chain brake: Pull the on this chainsaw – depending on the chain sprocket cover. hand guard (6) back toward the front chain sprocket (see “Specifications”): handle. The chain pitch (1) must match the pitch of the sprocket and the guide bar (for Rollomatic). The drive link gauge (2) 4 5 001BA128 KN :Turn screw (4) counterclockwise 143BA003 KN must match the bar groove width (3). The pitch is marked on the chain sprocket and guide bar in inches (e.g. 3/8 or .325). The groove width is marked on the guide bar in millimeters (e.g. 1.6). If non-matching components of the until the tensioner slide (5) butts wrong pitch or drive link gauge are against left end of housing slot. Wear work gloves to protect your hands from the sharp cutters. run together on the same machine they may be damaged beyond repair after a short period of operation. : Fit the chain – start at the bar nose. 22 MS 191 T English / USA Tensioning the Saw Chain Checking Chain Tension (Front Chain Tensioner) 10 77 8 9 001BA111 KN1 170BA000 KN142BA064 KN : Fit the guide bar over the studs (7) – cutting edges on top of bar must point to right – and engage the peg of the tensioner slide in the locating hole (8) –- place the chain over sprocket (9) at the same time. : Now turn tensioning screw (10) clockwise until there is very little chain sag on the underside of the bar –- and the drive link tangs are located in the bar groove. : Refit the sprocket cover and screw on the nut only fingertight. : Go to “Tensioning the Saw Chain”. Retensioning during cutting work: : Shut off the engine and then loosen the nut. : Hold the bar nose up. : Use screwdriver to turn the tensioning screw (1) clockwise until the chain fits snugly against the underside of the bar. : While still holding the bar nose up, tighten down the nut firmly. : Follow instructions in chapter "Checking Chain Tension". A new chain has to be retensioned more often than one that has been in use for some time. Check chain tension frequently – see chapter "During Operation". : Shut off the engine. : Wear work gloves! : Chain must fit snugly against the underside of the bar – and, with the chain brake disengaged, it must still be possible to pull the chain along the bar by hand. : If necessary, retension the chain. A new chain has to be retensioned more often than one that has been in use for some time. Check chain tension frequently! – see chapter "During Operation". MS 191 T 23 English / USA Fuel This engine is certified to operate on unleaded gasoline and the STIHL two- stroke engine oil at a mix ratio of 50:1. Your two-stroke engine requires a mixture of high-quality gasoline and quality two-stroke air cooled engine oil. Use mid-grade unleaded gasoline with a minimum octane rating of 89 (R+M/2). If the octane rating of the mid-grade gasoline in your area is lower, use premium unleaded fuel. Fuel with a lower octane rating may increase engine temperatures. This, in turn, increases the risk of piston seizure and damage to the engine. The chemical composition of the fuel is also important. Some fuel additives not only detrimentally affect elastomers (carburetor diaphragms, oil seals, fuel lines, etc.), but magnesium castings and catalytic converters as well. This could cause running problems or even damage the engine. For this reason STIHL recommends that you use only nationally recognized high-quality unleaded gasoline! Use only STIHL two-stroke engine oil or equivalent high-quality two-stroke engine oils that are designed for use only in air cooled two-cycle engines. We recommend STIHL 50:1 two-stroke engine oil since it is specially formulated for use in STlHL engines. Do not use BIA or TCW rated (two- stroke water cooled) mix oils or other mix oils that state they are for use in both water cooled and air cooled engines (e.g., outboard motors, snowmobiles, chainsaws, mopeds, etc.). Take care when handling gasoline. Avoid direct contact with the ski...