Maintenance
GB–18
Air Filter
Clean air filter once every season or every 50 hours;
clean more frequently under dusty conditions.
Note:
Do not operate engine without air filter
element; extreme engine wear or
damage will occur.
1.
To remove air filter, snap cover latch open and
swing to side (Fig. 24).
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m–3834
1
2
Figure 24
1.
Filter
2.
Cover
2.
Remove air filter.
3.
Wash air filter in laundry detergent or kerosene
(Fig. 25).
4.
Squeeze filter to remove excess liquid and blot
dry with a paper towel or rag.
988
Figure 25
5.
Apply one tablespoon of SAE 30W oil to the air
filter (Fig. 26).
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Figure 26
6.
Squeeze until oil is distributed evenly
throughout filter. Blot lightly with paper towel to
remove excess oil.
7.
Replace filter with cleaner side facing carburetor.
Note:
Be sure filter is fully seated in air box
and does not pucker, allowing direct
passage of air and dirt.
Spark Plug
A spark plug that is dirty, pitted, carbon-covered or
has worn electrodes may cause hard starting and poor
operation.
Replace spark plug once a season or clean every 50
hours, whichever occurs first. Use an NGK
BPMR4A spark plug.
1.
Pull wire off spark plug. Remove spark plug and
clean with a wire brush, removing carbon
build–up. DO NOT SAND BLAST. Check
condition of plug for cracks and damaged or
worn electrodes. Replace if necessary.
2.
Set spark plug gap at .035 inch (.85 mm)
(Fig. 27).
