Maintenance WM 80
28 wc_tx000520gb.fm
3.9 Engine Cleaning
The WACKER WM 80 engine is air cooled and depends on the
cylinder cooling fins to dissipate heat. Dirt and debris caught in the
cooling fins can prevent them from dissipating heat causing the engine
to overheat. For this reason, it is important to inspect and clean the fins
as often as job conditions dictate. Clean debris from between the fins
using a screwdriver or similar implement.
3.10 Spark Plug
A well-maintained spark plug is essential to good combustion. Keep
the spark plug’s electrode clean and gapped to the correct setting. See
section Tune-up Specifications. Before removing the spark plug from
the engine, clean the immediate area around the spark plug to prevent
any dirt from falling into the cylinder when the spark plug is removed.
NOTICE: Do not remove the spark plug while the engine is hot. The
aluminum threads of the cylinder may strip.
3.11 Muffler
See Graphic: wc_gr005088, wc_gr007375
Carbon deposits normally form over a period of time at the engine
exhaust and the muffler. If allowed to accumulate, these deposits may
eventually restrict the exhaust passages, resulting in poor
performance and hard starting. Factors contributing to excessive
carbon buildup include:
• Too much oil in the fuel mixture
• Dirty air filter
• Excessive idling
• Dirty carburetor
• Too rich fuel/air mixture
• Incorrect fuel jets
To service the muffler:
3.11.1 Remove the muffler (1, 2) from the engine.
3.11.2 Crank the engine until the piston is at the top of its stroke and covering
the exhaust port.
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