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To clean or replace foam pre-cleaner:
• Remove air cleaner cover, then foam pre-filter.
• Wash pre-cleaner in soapy water. Squeeze pre-
filter dry in clean cloth (DO NOT TWIST).
• Clean air cleaner cover before installing it.
To clean or replace paper air filter:
• Remove air cleaner cover; then remove foam pre-
filter (service if necessary) and remove paper filter.
• Clean paper filter by tapping it gently on a solid
surface. If the filter istoo dirty, replace it with a new
one. Dispose of the old filter properly.
• Clean air cleaner cover then insert pre-cleaner into
cover. Next insert new paper filter into cover to hold
pre-cleaner in place and assemble all of them to
the base of the air cleaner.
Note: If you need to order a new air filter, please call
1-800-366-PART.
CLEAN SPARK ARRESTOR SCREEN
The engine exhaust muffler has a spark arrestor
screen. Inspect and clean the screen every 100 hours
of operation or once each year, whichever comes first.
NOTE: If you use your generator on any forest-
covered, brush-covered or grass-covered unimproved
land, it must have a spark arrestor. The spark arrestor
must be maintained in good condition by the
owner/operator.
Clean and inspect the spark arrestor as follows:
• To remove the muffler guard from the muffler,
remove the four screws that connect the guard to
the muffler bracket.
SPARKARRESTER
SCREEN
MUFFLER
HEAT SHIELD
To adjusting valve clearance:
• Make sure the engine is at room temperature
• Make sure that the spark plug wire is removed from
the spark plug and out of the way.
Remove the breather tube from the valve cover.
Remove the four screws attaching the valve cover
with a #2 or 3 phillips screwdriver.
Make sure the piston is at Top Dead Center (TDC)
of its compression stroke (both valves closed). To
get the piston at top dead center, pull on the recoil
handle slowly watching the piston trough the spark
plug hole. As you pull on the recoil handle the
piston should move up and down. The piston is put
Top Dead Center when it is up as high as it can go.
Feeler
Allen Wrench Gauge
Loosen
Jam Nut
• Loosen the rocker arm jam nut. Use an 8mm allen
wrench to turn the pivot ball stud while checking
clearance between the rocker arm and the valve
stem with a feeler gauge. Correct clearance is
0.002-0.004 inch (0.05-0.1mm). Note: You must
hold the rocker arm jam nut in place as you turn the
pivot ball stud.
• When valve clearance is correct, hold the pivot ball
stud in place with the allen wrench and tighten the
rocker arm jam nut. Tighten the jam nut to 165-183
inch-pounds torque. After tightening the jam nut,
recheck valve clearance to make sure it did not
change.
Remove four screws that attach the spark arrestor
screen.
Inspect screen and replace if torn, perforated or
otherwise damaged. DO NOT USE a defective
screen. If screen is not damaged, clean it with
commercial solvent.
Reattach the screen and the muffler guard.
ADJUSTING VALVE CLEARANCE
After the first 50 hours of operation, you should adjust
the valve clearance in the engine.
Important: If you feel uncomfortable about doing this
procedure or you don't have the proper tools, please
take your generator in to the nearest service center to
have the valve clearance adjusted. This is a very
important step to insure longest life for your engine.
Tighten Jam Nut to 165
inch-pounds - 183
inch-pounds (19-21 N-m)
Reattach the valve cover. Note: Start all four
screws before tightening or you will not be able to
get all the screws in place. Note: Make sure the
gasket between the valve cover and cylinder head
is in place.
Reattach the breather tube.
Reattach the spark plug wire to the spark plug.
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