Craftsman 580.327130 Operator's Manual page 11

• 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.
• 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 Sears
service center to have the valve clearance adjusted.
This is a very important step to insure the longest life
for your engine.
To adjust 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 to TDC, pull on the recoil handle
slowly while watching the piston through the spark
plug hole. As you pull on the recoil handle, the
piston should move up and down. The piston is at
TDC when it is up as high as it can go.
• Loosen the rocker arm jam nut. Use an 8 mm 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 to 65-85 inch-pounds torque.
After tightening the jam nut, recheck valve
clearance to make sure it did not change.
• Reattach the valve cover. Start all four screws
before tightening or you will not be able to get all
the screws in place. 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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