AIR CLEANER
A dirty air cleaner will restrict air flow to the carburetor, reducing engine
performance. If you operate the engine in very dusty areas, clean the air
filter more often than specified in the MAINTENANCE SCHEDULE.
Operating the engine without an air filter, or with a damaged air filter, will
allow dirt to enter the engine, causing rapid engine wear. This type of
damage is not covered by the Distributor's Limited Warranty.
Inspection
Remove the air cleaner cover and inspect the filter element. Clean or
replace a dirty filter element. Always replace a damaged filter element.
Cleaning
1. Clean the filter element in warm soapy water, rinse, and allow to dry
thoroughly. Or clean in non-flammable solvent and allow to dry.
2. Dip the filter element in clean engine oil, then squeeze out all excess
oil. The engine will smoke when started if too much oil is left in the
element.
3. Wipe dirt from the air cleaner body and cover, using a moist rag. Be
careful to prevent dirt from entering the carburetor.
AIR CLEANER BODY
AIR CLEANER COVER
FILTER
ELEMENT
SPARK PLUG
Recommended Spark Plugs: CR4HSB (NGK)
The recommended spark plug has the correct heat range for normal
engine operating temperatures.
An incorrect spark plug can cause engine damage.
For good performance, the spark plug must be properly gapped and free
of deposits.
1. Disconnect the spark plug cap, and remove any dirt from around the
spark plug area.
2. Remove the spark plug with a 5/8-inch spark plug wrench.
3. Inspect the spark plug.
Replace it if damaged or
badly fouled, if the sealing
washer is in poor condition,
or if the electrode is worn.
4. Measure the spark plug
electrode gap with a wire-
type feeler gauge. Correct
the gap, if necessary, by
carefully bending the side
electrode. The gap should be:
0.6–0.7 mm (0.024–0.028 in)
5. Install the spark plug carefully, by hand, to avoid cross-threading.
6. After the spark plug is seated, tighten with a 5/8-inch spark plug
wrench to compress the sealing washer.
7. When installing a new spark plug, tighten 1/2 turn after the spark
plug seats to compress the washer.
8. When reinstalling a used spark plug, tighten 1/8–1/4 turn after the
spark plug seats to compress the washer.
A loose spark plug can overheat and damage the engine.
Overtightening the spark plug can damage the threads in the cylinder
head.
9. Attach the spark plug cap to the spark plug.
ENGLISH
U14FSR-UB (DENSO)
SPARK PLUG WRENCH
SPARK PLUG CAP
0.6–0.7 mm
(0.024–0.028 in)
SEALING
WASHER
SIDE
ELECTRODE
9