English
N
Remove spark plug – see "Starting /
Stopping the Engine".
Spark Plug
N
N
Clean dirty spark plug.
If engine is down on power, difficult to
start or runs poorly at idling speed, first
check the spark plug.
Check electrode gap (A) and
readjust if necessary – see
"Specifications".
Fit a new spark plug after approx. 100
operating hours or earlier if the
electrodes are badly eroded.
N
Use only resistor type spark plugs of
the approved range.
N
N
Pull off the spark plug boot
Unscrew spark plug
Rectify problems which have caused
fouling of spark plug:
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.
N
N
N
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.
Remove the spark plug
N
N
Move the Master Control lever to the
stop position 0
Push the hand guard forwards – the
saw chain is blocked
1
2
1
Wrong fuel mix (too much engine oil in
the gasoline), a dirty air filter and
1
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.
N
N
Loosen screws (1)
Remove the shroud (2)
If engine is down on power, difficult to
start or runs poorly at idling speed, first
check the spark plug.
MS 311, MS 391
39
| Categories | Chainsaw Manuals, STIHL Chainsaw Manuals |
|---|---|
| Tags | STIHL MS 311, STIHL MS 391 |
| Download File |
|
| Language | English, Español |
| Product Brand | STIHL. Stihl Inc, USA - Corporate phone: (757) 486-9100. International Support Information: http://stihl.com Email: info@stihl.com, Chainsaw |
| Document File Type | |
| Publisher | stihl.com |
| Wikipedia's Page | Stihl |
| Copyright | Attribution Non-commercial |
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