Stihl MS 290 STIHL FARM BOSS Product Instruction Manual - Page 45
Replacing Starter Rope, and Rewind Spring - starter pawl and rope
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133BA014 KN English / USA If engine is down on power, difficult to start or runs poorly at idling speed, first check the spark plug. : Remove spark plug - see "Starting / Stopping the Engine". : Clean dirty spark plug. : Check electrode gap (A) and readjust if necessary - see "Specifications". : Use only resistor type spark plugs of the approved range. Rectify problems which have caused fouling of spark plug: : Too much oil in fuel mix. : Dirty air filter. : Unfavorable running conditions, e.g. operating at part load. Fit a new spark plug after approx. 100 operating hours or earlier if the electrodes are badly eroded. Replacing Starter Rope and Rewind Spring 1 1 1 1 : Remove the screws (1). : Ease fan housing away from 1 crankcase and remove it sideways. 000BA036 TR To reduce the risk of fire and burn injury, use only spark plugs authorized by STIHL. Always press spark plug boot (2) snugly onto spark plug terminal (1) of the proper size. (Note: If terminal has detachable SAE adapter nut, it must be attached.) A loose connection between spark plug boot and ignition wire connector in the boot may create arcing that could ignite combustible fumes and cause a fire. 23 4 : Use screwdriver or suitable pliers to carefully remove spring clip (2) from the starter post. : Carefully remove the rope rotor with washer (3) and pawl (4). The rewind spring may pop out and uncoil during this operation. 133BA015 KN 44 MS 290, MS 310, MS 390
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