Maintenance GH 3500
26
7.6 Checking / cleaning / replacing the spark plug
f Remove the spark plug connector.
f Remove the spark plug with a spark plug wrench.
f Clean the electrodes with a wire brush.
f Check the isolator (2) – if damaged, replace the spark plug.
f Check and adjust the electrode gap (1) – see chapter Technical data for the
gap.
f Insert the spark plug and tighten it with a torque wrench.
WARNING
Hot exhaust!
Touching it can cause burns.
Only remove the spark plug when the engine has cooled down.
Torque [Nm] Spark plug
15
New spark plug
25
Used spark plug
CAUTION
A loose spark plug can damage the engine.
Always tighten the spark plug.
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