SERVICING AIR CLEANER (Fig. 11–12)
The foam precleaner must be cleaned and re-oiled after every 25
hours engine operation if the engine is operated in clean air condi-
tions. However, the air cleaner must be cleaned every few hours if
operating conditions are extremely dusty or sandy.
1.
Remove the engine shield mounting screws and remove the
shield.
2.
Remove the lock nut and air cleaner cover.
3.
Remove the foam precleaner by sliding it off the paper ele-
ment.
4.
A. Wash the foam precleaner in detergent and warm water.
B. Wrap the foam precleaner in cloth and squeeze it dry. Do
not wring the precleaner.
C. Saturate the foam pre-cleaner in engine oil. Squeeze to
remove excess oil.
5.
Reinstall it on the paper cartridge.
Inspect the paper element every 50 hours of operation and
replace when dirty or damaged. Do not wash the paper element
or do not clean it with compressed air because damage will
occur.
Note:
With the air cleaner disassembled, check the air
cleaner components for damage. Replace if necessary. Make
sure the rubber breather tube in the base plate is securely in
place or severe engine damage may occur.
6.
Reinstall the element with the precleaner, element cover seal,
air cleaner element cover, nut, air cleaner cover and lock nut.
7.
Tighten the lock nut 1/2 to 1 turn after the nut contacts cover.
Do not overtighten.
8.
Reinstall the engine shield.
CHECKING AND REPLACING THE
SPARK PLUG (Fig. 13)
Since the air gap between center and side electrodes increases grad-
ually during normal engine operation, check the condition of elec-
trodes at 100-hour intervals. The correct spark plug for the engine is
17
Figure 11
1.
Air cleaner cover
Figure 12
1.
Foam precleaner
Figure 13
1.
Main fuel screw
2.
Idle fuel adjusting screw
3.
Idle speed screw
