To clean foam element, separate it from the paper element 2.
and wash in liquid detergent and water. Allow to dry
thoroughly before using. Do not oil the foam element.
Spark Plug Service
WARNING! DO NOT check for spark with spark
plug removed. DO NOT crank engine with spark
plug removed.
WARNING! If the engine has been running, the
muffler will be very hot. Be careful not to touch the
muffler.
To ensure proper engine operation, the spark plug must be
properly gapped and free of deposits.
Remove the spark plug boot and use a spark plug wrench 1.
to remove the plug. See Fig. 6-3.
2. Visually inspect the spark plug. Discard the spark plug if there
is apparent wear, or if the insulator is cracked or chipped.
Clean the spark plug with a wire brush if it is to be reused.
3. Measure the plug gap with a feeler gauge. Correct as
necessary by bending side electrode. See Fig. 6-4. The gap
should be set to 0.030 in.
4. Check that the spark plug washer is in good condition
and thread the spark plug in by hand to prevent cross-
threading.
5. After the spark plug is seated, tighten with a spark plug
wrench to compress the washer.
NOTE: When installing a new spark plug, tighten ⁄ turn
after the spark plug seats to compress the washer. When
reinstalling a used spark plug, tighten ⁄-⁄ turn after the
spark plug seats to compress the washer.
CAUTION! The spark plug must be securely
tightened. An improperly tightened spark plug can
become very hot and may damage the engine.
Cleaning the Engine
If the engine has been running, allow it to cool for at least half
an hour before cleaning. Periodically remove dirt build-up from
the engine. Clean around the muffler. Clean with a brush or
compressed air.
CAUTION! Do not spray engine with water to clean
because water could contaminate fuel. Using a
garden hose or pressure washing equipment can
also force water into the muffler opening. Water that
passes through the muffler can enter the cylinder,
causing damage.
WARNING! Accumulation of debris around muffler
could cause a fire. Inspect and clean before every
use.
0.02-0.03 in.
0.60-0.80 mm
Electrode
Figure 6-4
Spark Plug
Spark Plug
Boot
Figure 6-3
18 se c t i O n 7 — en g i n e Ma i n t e n a n c e
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