Stihl FS 311 Instruction Manual page 38

English
Checking the spark plug
Clean the spark plug if it is dirty
N
Check the electrode gap (A) and
N
readjust if necessary – see
"Specifications"
Use only resistor type spark plugs of
N
the approved range. See the
chapter "Specifications" in this
instruction manual
Correct the problems that have caused
fouling of the spark plug:
too much oil in fuel mix;
–
dirty air filter; or
–
unfavorable running conditions, e.g.
–
operating at part throttle.
36
A
WARNING
To reduce the risk of fire and burn injury,
use only spark plugs authorized by
STIHL. Always press the spark plug
boot (1) firmly and securely onto the
spark plug terminal (2).
Do not use a spark plug with a
detachable SAE adapter terminal (3).
Arcing may occur that could ignite
combustible fumes and cause a fire.
This can result in serious injuries or
damage to property.
Only use resistor type spark plugs
N
with solid, non-threaded terminals
Installing the Spark Plug
Screw the spark plug (3) into the
N
cylinder.
Tighten down the spark plug (3) with
N
the combination wrench.
1
3
2
Press the boot (2) firmly onto the
N
spark plug.
Fit the cover (1) and screw it down
N
firmly.
FS 311