Stihl FS 88 Instruction Manual - Page 42

Checking Spark Plug, Cleaning Air Filter

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Checking Spark Plug Cleaning Air Filter 1 A ':5 8 ..: g1Il o (~2---\(~ If engine is down on power, difficult to start or runs poorly at idling speed, first check the spark plug. • Remove spark plug see "If engine doesn't start:" • Clean dirty spark plug. • Check electrode gap - it should be 0.5 mmlO.020" (A) readjust if necessary. • Use only suppressed spark plugs of the approved type. Rectify faults which have caused fouling of spark plug: Incorrect carburetor setting, 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. • If there is a noticeable loss of engine power: • Set choke lever to .L - • Grip tab (2) and pull the filter cover (1) off the carburetor. • Clean away loose dirt from around the filter. 41

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Checking Spark Plug
Cleaning Air Filter
1
(~2
---\(~
'-=~=======*
A
':5
8
..:
1Il
g
o
If
engine
is
down on power, difficult
to
start or runs poorly at idling speed,
first check the spark plug.
•
Remove spark plug -
see "If engine doesn't start:"
•
Clean dirty spark plug.
•
Check electrode gap -
it
should be 0.5
mmlO.020"
(A)
-
readjust
if
necessary.
•
Use only suppressed spark plugs
of the approved type.
Rectify faults which have caused
fouling of spark plug:
Incorrect carburetor setting, 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.
•
If there
is
a noticeable loss
of engine power:
•
Set choke lever to
.L
-
•
Grip tab
(2)
and pull the
filter cover
(1)
off the carburetor.
•
Clean away loose dirt from
around the filter.
41