Stihl MS 194 T Instruction Manual page 42

English
3
Insert a suitable tool in the spark
N
plug boot (3).
Pry off the spark plug boot.
N
Unscrew the spark plug.
N
40
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.
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
1
3
2
MS 194 T