&St_on Service &Troubleshooting Guide - Home Generator Systems
'_ Model 1938 (10kW) Generat0r Assembly
Service Air Cleaner
The engine's air cleaner is one of the most important areas
to maintain. The engine will not run properly and will be
damaged if it is run with a dirty air cleaner system.
Use only genuine BRIGGS & STRATTON parts or their
equivalent. The use of replacement parts which are not of
equivalent quality may damage the engine.
Clean the foam precleaner every 25 hours and the cartridge
every 100 hours of operation.
Clean or replace more often in dusty or dirty conditions.
CAUTION: Never run this equipment
without the complete air cleaner system instaJled
on the engine. FaiJure to do so wilJ result in
premature engine wear and significantJy reduced
engine life.
To service the air cleaner components:
• Unhook clips on both sides of air cleaner cover and
remove.
• Carefully slide foam precleaner off cartridge.
• To service precleaner, wash in liquid detergent and
water. Squeeze dry in a clean cloth. Never twist!
Saturate in clean, fresh engine oil. Squeeze in clean,
absorbent cloth to remove excess oil. Replace if very
dirty or damaged.
• Remove knob and plate. Carefully remove cartridge to
prevent debris from entering carburetor.
• To service cartridge, clean by tapping gently on a flat
surface. Do not oil cartridge. Replace if very dirty or
damaged.
NOTE: Do not use petroleum solvents, e.g.
kerosene, which will cause the cartridge to
deteriorate. Do not use pressurized air to clean
cartridge. Pressurized air can damage the cartridge.
• Reinstall cartridge, plate and knob.
• Reassemble precleaner on cartridge.
• Replace cover and attach clips to body.
Inspect Spark Arrester Screen
The engine exhaust muffler has a spark arrester screen.
Inspect the screen every 50 hours of operation or once
each year, whichever comes first. The spark arrester must
be maintained in good condition by the owner/operator.
Inspect the spark arrester as follows:
• Using a powerful flashlight, examine the circular screen
installed in the end of the exhaust port. There should
be no rips or tears in the screen. There should be little
or no accumulated soot on the screen.
• Replace the screen if torn, perforated or otherwise
damaged. Do not use a defective screen. Consult
BRIGGS & STRATTON Technical Services for
assistance in changing the screen.
ooIf screen is not damaged:
• It may be cleaned in place with a gentle brushing using a
wire brush or bottle brush.
Engine Governed Speed
CAUTIO N: The engine Speed Wa s properly
adjusted at the factory and shouJd require no
additional adjustment. Do not attempt to change
engine speed, if you believe the engine is running
too fast or too slow, contact the factory for
assistance_
CHANGING THE ENGINE GOVERNED SPEED
WILL VOID THE ENGINE WARRANTY AND
WILL ADVERSELY AFFECT SYSTEM
OPERATION.
To assure smooth operation, keep governor linkage, springs
and controls free of debris.
Valve Lash
Valve lash must be checked while engine is cold after every
100 hours of operation. Adjust if necessary. Valve lash is:
Intake and Exhaust 0.004 - 0.006 in. (0.10 - 0.15 mm)
Carburetor Adjustments
The engine carburetor is preset at the factory. The
carburetor should not be tampered with because doing so
will void the emission control system warranty. If you
experience problems or your engine is used at an altitude
higher than 5,000 feet, contact your installer or the factory.
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