Spark Plug - Stihl FS 260 Instruction Manual

19 Spark Plug

5 Synthetic fabric filter element for the air filter
– Instructions for converting the machine
For machines with tank cap with hinged grip:
– O-ring for the tank filler cap
After installing the cover plate kit:
► Set the shutter (2) to the winter position.
18.5 At temperatures above –10°C
► Remove the parts of the cover plate kit and
refit the standard parts for summer operation.
Note for machines with tank cap with hinged grip:
The O-ring supplied with the cover plate kit can
be left on the machine's tank cap.
Depending on the ambient temperature:
► Set the shutter (2) to the summer or winter
position.
18.6 Cleaning the Air Filters
► Loosen filter cover mounting screws.
► Remove the filter cover.
► Clean away loose dirt from around the filter (5)
and inside the filter cover.
► Knock the filter (5) out on the palm of your
hand or blow it clear with compressed air from
the inside outwards.
In case of stubborn dirt or sticky filter fabric:
► Wash the filter in a clean, non-flammable solu‐
tion (e.g. warm soapy water) and then dry.
Always replace a damaged filter.
19 Spark Plug
► If the engine is down on power, difficult to start
or runs poorly at idle speed, first check the
spark plug.
► Fit a new spark plug after about 100 operating
hours – or sooner if the electrodes are badly
eroded. Install only suppressed spark plugs of
the type approved by STIHL – see "Specifica‐
tions".
19.1 Removing the Spark Plug
0458-743-0121-E
► Rotate the screw (1) in the cap (2) until the
► Lift the front of the cap (2) and push it to the
► Leave the cap to one side.
► Pull off the spark plug boot (3).
► Unscrew the spark plug.
19.2
► Clean dirty spark plug.
► Check electrode gap (A) and readjust if neces‐
► Rectify the problems which have caused foul‐
Possible causes are:
– Too much oil in fuel mix.
– Dirty air filter.
– Unfavorable running conditions.
1
screw head projects from it.
3
rear to disengage.
Checking the Spark Plug
sary – see "Specifications".
ing of the spark plug.
English
A
1
35