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Use the following instructions to clean or replace the air
cleaner components:
1. Remove the cover by loosening both hold-down straps.
2. Slide the foam pre-cleaner off the cartridge.
3. Wash the pre-cleaner in liquid detergent and water.
4. Squeeze the pre-cleaner dry with a clean cloth. DO NOT TWIST.
5. Prelube the pre-cleaner with clean motor oil.
6. Squeeze the pre-cleaner in a clean cloth to remove excess oil. DO
NOT TWIST.
7. Remove the knob and plate in order to tap the cartridge gently on a
solid surface to loosen and remove trapped particles.
NOTE: If the filter is too dirty, it must be replaced.
Figure 5 – Air Cleaner
8. Reinstall the pre-cleaner over the cartridge.
9. Reinstall the air cleaner assembly.
10. Reinstall the plate, knob and cover.
REPLACING THE SPARK PLUGS
Use Champion RC12VC spark plugs or equivalent. The
correct air gap is 0.76 mm (0.030 in.). Remove the plugs
every 100 hours of operation or once each year, whichev-
er comes first. This will help your engine to start easier and
run better.
1. Stop the engine and pull the spark plug wires off of the spark plugs.
2. Clean around the spark plugs and remove them from the cylinder
head.
3. Set the spark plugs’ gap (Figure 6) to 0.76 mm (0.030 in.). Install the
correctly gapped spark plugs into the cylinder heads.
Figure 6 – Setting Spark Plug Gap
SERVICE AND ADJUSTMENTS
ENGINE SPEED
CAUTION: The engine speed was properly adjusted at
the factory and should require no additional adjustment.
Do not attempt to change engine speed. If you believe
the engine is running too fast or too slow, take your
engine to an authorized service center for repair and
adjustment. CHANGING THE ENGINE GOVERNED
SPEED WILL VOID THE ENGINE WARRANTY.
Your engine runs at a constant speed. This constant operat-
ing speed is maintained by a mechanical, flyweight type,
fixed speed governor. DO NOT try to adjust the governed
speed setting for the following reasons:
• Operating the engine at high engine speeds is dangerous and increas-
es the risk of personal injury or damage to the equipment.
• Operating the engine at low engine speeds with heavy loads may
shorten the engine’s life.
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