14
• Lift air cleaner assembly (air cleaner cartridge and
precleaner) off stud.
• Push clean (or new) air cleaner assembly onto
stud. Air cleaner must fit sec urely on base.
• Push cover square ly onto base and tighten knob.
NOTE: Clean pre-cleaner every fe w hours under
extremely dusty conditio ns. To clean pre-cleaner,
separate it from cartridge a nd wash in liquid detergent
and water. Air dry thoro ughly. Do not oil pre-cleane r.
Re-assemble dry pre -cleaner onto clean
cartridge.Replace the air cleaner cartridge once a
season.
IMPORTANT: Do not use pressu rized air or solvents to
clean cartridge. Pressurized air ca n damage cartridge.
Solvents will dissolve cartridg e.

Cleaning Engine

• Promptly wipe off any fuel or oil sp illed on the
machine with clean cloth.
• Using a brush or cloth, remove debris from the
finger guard on the e ngine daily to prevent
overheating of th e engine. Do not use water to
clean engine parts. Water could conta minate the
fuel system.
• Keep the throttle linkage, sp rings and controls free
of debris.
• Clean muffler area and remove any debris before
operating the unit.

Spark Plug

• Clean area around the spark plug base.
• Remove and inspect the spark plug.
• Replace the spark plug if electrodes are pitted,
burned, or the porcelain is cracked. See Figure 15.
• Clean the spark plug and reset the gap to.030" at
least once a sea son or every 100 hours of
operation. See Fig ure 15. Replace if necessary.
Refer to parts list section for pa rt number.
NOTE: Do not sandblast spark plug. Spark plug should
be cleaned by scrap ing or wire brushing and washing
with a commercial solvent.
Figure 15

Changing Oil

To drain oil from the engine’s crankcase, proceed as
follows:
• Run the engine for a few minutes to allow the oil to
warm up. Warm oil flows mo re easily and will carry
away more impurities when draining o il.
• Position the chipper shre dder on level surface and
place an appropriate receptacle with a capacity of
at least one quart beneath the oil drain tube. See
Figure 16.
Figure 16
• Remove the oil dipstick.
• Use a 3/8” wrench to unthread the oil plug from the
drain tube, allowing the used oil to flow out.
• Replace the oil plug and add 20 oz. of new oil
(Refer to Page 9 for pro per oil type). Do NOT
overfill.
• Replace dipstick and check oil level (Refer to Page
9).
.030” (0.76 mm)
Oil Drain Tube
Oil Dipstick