Stihl MS 150 C-E Instruction Manual - Page 35
Starting the Engine
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3006BA024 KN 3006BA011 KN Standard setting B L H L N Determine the required standard setting as follows: Turn the low speed screw (L) carefully clockwise as far as stop, then turn it counterclockwise. Is range of adjustment more than 1 turn? N Continue with "Standard setting A" Is range of adjustment less than 1 turn? N Continue with "Standard setting B" Standard setting A H L N Turn high speed screw (H) counterclockwise as far as stop (no more than 3/4 turn). N Turn the low speed screw (L) carefully clockwise as far as stop, then turn it back 1/4 turn. Adjusting Idle Speed N Carry out the standard setting. N Starting the Engine Warm up engine before adjusting idle speed. Run the engine at idle speed for 10 seconds. English Saw chain runs while engine is idling N Turn the idle speed screw (LA) counterclockwise until the chain stops moving - allow engine to run at idle speed for 10 seconds. N Turn the idle speed screw (LA) clockwise until the chain begins to run - then back it off 4 turns. WARNING If the chain continues moving when the engine is idling, have your saw checked and repaired by your servicing dealer. Erratic idling behavior, poor acceleration (even though standard setting of low speed screw is correct) Idle setting is too lean N Turn the low speed screw (L) counterclockwise, no further than stop, until the engine runs and accelerates smoothly. It is usually necessary to change the setting of the idle speed screw (LA) after every correction to the low speed screw (L). Fine Tuning for Operation at High Altitude 3006BA011 KN 3006BA025 KN N Turn high speed screw (H) counterclockwise as far as stop (no more than 3/4 turn). N Turn the low speed screw (L) carefully clockwise until it is against its seat, then turn it back 1 full turn Engine stops while idling N Turn the idle speed screw (LA) clockwise until the chain begins to run - then back it off 4 turns. A slight correction of the setting may be necessary if engine does not run satisfactorily: N Carry out the standard setting. N Warm up the engine. N Turn high speed screw (H) slightly clockwise (leaner) - no further than stop. MS 150 TC 33