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1. Remove the air filter cover. Then remove the element
from the case (Fig. 12).
Figure 12
1. Sponge air filter
2. Clean the felt air filter and the cover with compressed
air (Fig. 13).
Figure 13
3. Wash the sponge air filter with a suitable cleaning
solvent. Dry the sponge filter completely after
washing.
Replacing the Spark Plug
Remove plug after every 50 operating hours and check its
condition. Replace spark plug every 100 operating hours
or every season. Use a Champion RCJ7Y spark plug or
equivalent.
1. Stop engine and wait for all moving parts to stop. Pull
wire off spark plug.
2. Clean around spark plug and remove plug from
cylinder head.
IMPORTANT: Replace a cracked, fouled, or dirty
spark plug. Do not sand blast, scrape, or clean
electrodes because engine damage could result from
grit entering cylinder.
3. Set air gap at 0.024 – 0.028" (Fig. 14). Install correctly
gapped spark plug and gasket seal. Tighten plug firmly
to 10–12 ft–lb.
1
2
M–3878
2. Felt air filter
M–3879
Servicing the Fuel Filter
Clean and inspect the fuel filter for damage after every 20
hours of use. The fuel filter is attached to the fuel pick-up
tube inside the fuel tank (Fig. 15). Loosen the clamp and
remove the filter (Fig. 16).
2
1
3
1. Fuel tube
2. Grommet
É É É É É É
1
É É É É É É
É É É É É É
4
É É É É É É
1. Clamp
2. Weight
1. To clean the fuel filter, remove it from the fuel tube
and wash it with fuel mixture.
2. Inspect and clean the fuel tank before re-installing the
fuel filter. Always replace a defective fuel filter.
9
Figure 14
M–3880
Figure 15
3. Fuel filter
3
Figure 16
3. Fuel filter
4. Washer
2
M–3881
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