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20
Regular Maintenance
CHANGING THE SPARK PLUG
An annual spark plug change is an inexpensive preven-
tive measure that can help keep your unit running prop-
erly throughout the year.
Only replace the spark plug with the same model plug or
equivalent. See the engine manual or authorized dealer
for more information.
1. Disconnect and secure the spark plug wire from the
spark plug.
2. Clean the area around the spark plug to remove
debris that could fall into the engine when the plug is
removed.
3. Using a spark plug socket and appropriate wrench,
unscrew the spark plug from the engine.
4. After first setting the proper gap on the replacement
spark plug (see Engine Operator’s Manual for proper
gap setting for your engine), screw the new plug in
and tighten. Don’t over tighten, as this could dam-
age the cylinder head.
CLEAN ENGINE FINS
& AIR INTAKE AREA
The engine that powers this chipper/shredder is air-
cooled and requires unobstructed air flow into and
around the engine. For proper engine cooling, the cool-
ing fins on the engine cylinder and cylinder head area
must be kept clear of debris deposits and any other
build-up that could prevent heat from radiating away from
the engine.
To clean the air intake area, remove any debris build-up,
and then blow out the area using a stream of com-
pressed air. If a compressor is not available, use a stiff
bristle parts brush, which is available at most auto parts
supply stores.
To clean the cooling fins, brush the area between the
fins with a stiff bristle parts brush, and blow out any
remaining debris with a stream of compressed air. If the
cooling fins are caked with an oily build-up of
chipper/shredder debris, using a commercially available
engine cleaning aerosol may help loosen and remove
the deposits.
Figure 18. Areas to clean after use
Figure 17. Spark Plug Gap Setting
Gap
Electrodes
Porcelain
Clean
Around
Area
CAUTION
Compressed air can spray debris into your eyes
causing permanent damage. Always wear safety
glasses when using compressed air.
Never use compressed air to clean your hands
or skin.
Clean
Around
Area
If you use such a cleaning product, you must follow all
safety and use instructions to prevent damage to the
engine components and personal injury to you.
NOTE: DO NOT clean the engine with a stream of water
because this could contaminate the electrical and fuel
systems.