6
5) Insert the cleaned and dry or
new foam air filter in the cover
and
replace the plastic grid.
6) Reinstall the air cleaner
assembly. Ensure the gasket is
in place beneath the filter.
7) Tighten the air filter wing nut
securely.
SEDIMENT CUP
CLEANING
1) Ensure the fuel valve is in the
OFF position and then remove
the fuel sediment cup and O-
ring.
2) Wash the cup and O-ring in a
non flammable solvent and dry
them thoroughly.
3) Place the O-ring in the fuel
valve and install the sediment
cup. Tighten the sediment cup
securely.
4) Move the fuel valve to the
ON position and check for
leaks. Replace the O-ring if
there is any leakage.
SPARK PLUG SERVICE
Recommended spark plugs:
BPR6ES (NGK)
W20EPR-U (DENSO)
NOTE: An incorrect spark plug
can cause engine damage
1) Disconnect the spark plug cap
and remove any dirt from around
the spark plug area.
2) Remove the spark plug with a
13/16 inch spark plug wrench.
3) Inspect the spark plug.
Replace it if the electrodes are
worn or if the insulator is chipped
or cracked.
4) Measure the electrode gap
with a suitable gauge. The gap
should be 0.028-0.031 inches.
Correct the gap if necessary by
bending the electrode carefully.
5) Install the spark plug carefully
by hand to avoid cross threading.
6) After the plug is seated, tighten
with a 13/16 inch spark plug
wrench to compress the sealing
washer.
If reinstalling a spark plug, tighten
1/8-1/4 turn after the plug is
seated.
If installing a new plug, tighten 1/2
turn after the spark plug is seated.
7) Attach the spark plug cap.
NOTE: A loose spark plug can
overheat and damage the engine.
An over-tightened plug can
damage the threads in the
cylinder head.
IDLE SPEED ADJUSTMENT
1) Start the engine outdoors and
allow it to warm up to operating
temperature.
NOTE: Dry operation will damage
the pump seal. Ensure the pump
chamber is filled with water before
starting the engine.
2) Move the throttle lever to its
slowest position.
3) Turn the throttle top screw to
obtain the standard idle speed of
1,400 RPMs.