Stihl MS 150 C-E Instruction Manual - Page 36

Spark Plug

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English NOTICE After returning from high altitude, reset the carburetor to the standard setting. If the setting is too lean there is a risk of engine damage due to insufficient lubrication and overheating. Spark Plug If engine is down on power, difficult to start or runs poorly at idling speed, first check the spark plug. Fit a new spark plug after approx. 100 operating hours or earlier if the electrodes are badly eroded. Wrong fuel mix (too much engine oil in the gasoline), a dirty air filter and unfavorable running conditions (mostly at part throttle etc.) affect the condition of the spark plug. These factors cause deposits to form on the insulator nose which may result in trouble in operation. Removing the Spark Plug 2 1 N Unscrew the nut (1) and remove the sprocket cover (2). 2011BA050 KN N Move the Master Control lever to 0 or STOP. N Pull off the spark plug boot. N Unscrew the spark plug. Checking the Spark Plug 2011BA029 KN 3006BA001 KN 000BA039 KN N Disengaging the Chain Brake A N Clean dirty spark plug. N Check electrode gap (A) and readjust if necessary - see "Specifications." N Use only resistor type spark plugs of the approved range. 34 MS 150 TC

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MS 150 TC
English
34
NOTICE
After returning from high altitude, reset
the carburetor to the standard setting.
If the setting is too lean there is a risk of
engine damage due to insufficient
lubrication and overheating.
If engine is down on power, difficult to
start or runs poorly at idling speed, first
check the spark plug.
Fit a new spark plug after approx. 100
operating hours
or earlier if the
electrodes are badly eroded.
Wrong fuel mix (too much engine oil in
the gasoline), a dirty air filter and
unfavorable running conditions (mostly
at part throttle etc.) affect the condition
of the spark plug. These factors cause
deposits to form on the insulator nose
which may result in trouble in operation.
Removing the Spark Plug
N
Move the Master Control lever to
0
or
STOP
.
N
Disengaging the Chain Brake
N
Unscrew the nut
(1) and remove the
sprocket cover (2).
N
Pull off the spark plug boot.
N
Unscrew the spark plug.
Checking the Spark Plug
N
Clean dirty spark plug.
N
Check electrode gap (A) and
readjust if necessary – see
"Specifications."
N
Use only resistor type spark plugs of
the approved range.
Spark Plug
3006BA001 KN
1
2011BA050 KN
2
2011BA029 KN
000BA039 KN
A