wc_tx003048gb.fm
37
BS 50-2 Maintenance
5.8 Cleaning and Checking the Spark Plug
When
Every week, or every 25 hours (whichever comes first)
Requirements
Engine stopped and cool to the touch
Spark plug wrench
Spark plug gap tool
Wire brush
Replacement spark plug as needed (see Technical Data)
Procedure
Perform the procedure below to clean and check the spark plug.
1. Disconnect the spark plug wire (b) and remove the spark plug (a).
2. Inspect the spark plug. Replace the spark plug if the insulator (c) is cracked or
chipped.
3. Clean spark plug electrodes (d) with a wire brush to remove carbon deposits.
4. Check the electrode gap (e) and adjust as needed. See Technical Data for the
recommended gap setting.
5. Reinstall the spark plug and torque it to 35–41 Nm (25.8–30.2 ft.lbs.).
NOTICE: A loose spark plug can become very hot and may cause engine damage.
Result
The spark plug has now been cleaned and checked.
WARNING
Burn hazard. The engine and muffler become very hot during operation and require
cool-down time after the engine is stopped.
f Do not touch the engine, muffler, or spark plug until the machine is cool.
wc_gr008988
a
b
d
c
e
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