Speed; Carburetor; Check Compression - Craftsman 580.327060 Owner's Manual

SERVICE AND ADJUSTMENTS
ENGINE SPEED
Engine speed was properly adjusted at the factory and
should require no additional adjustment. Do not attempt to
change engine speed. If you believe the engine is running
too fast or too slow, take your generator to. an authorized
Sears Service Center for repair and adjustment.
Your generator engine runs at a constant speed. This
constant operating speed is maintained by a mechanical,
flyweight type, fixed speed govenor. DO NOT try to adjust
the governed speed setting for the following reasons:
High engine speeds are dangerous and increase the
risk of personal injury or damage to equipment.
Low engine speeds impose a heavy load on the engine
when sufficient engine power is not available and may
shorten engine life.
The generator will supply correct rated a-c frequency
and voltage only at the proper speed. Some connected
electrical devices could be damaged by incorrect fre-
quency and/or voltage.
CARBURETOR
The engine carburetor was factory adjusted and, under
most normal conditions, should require no additional ad-
justment. However, some minor adjustment may be re-
quired to compensate for differences in fuel, temperature,
altitude, or load on the engine.
NOTE: DO NOT remove the air cleaner when running
engine. Operation without fully assembled air filter in-
stalled may cause engine damage.
INITIAL CARBURETOR ADJUSTMENT:
= Gently turn IDLE VALVE and NEEDLE vALVE (Fig.
14) clockwise until they just close. Valves may be
damaged by turning them in too far.
• Open NEEDLE VALVE one and a half turns
counterclockwise.
• Open IDLE VALVE one turn counterclockwise.
FINAL ADJUSTMENT:
• Start engine and let it warm up at least five minutes.
• Turn NEEDLE VALVE in (clockwise-lean mixture) until
engine starts to slow down.
• Turn NEEDLE VALVE out (counterclockwise - rich
mixture) past the smooth operating point.
° Turn the needle valve in (lean mixture) to midpoint
between rich and lean.
Rotate the THROTTLE counterclockwise and hold it
against the THRO-I-FLE STOP. While holding it in this
position, turn IDLE VALVE in slowly and then out
slowly. Set at midpoint between rich and lean.
Release THROTTLE. If engine does not accelerate
properly, readjust carburetor to a richer mixture.
IOLE AIR
BLEED
MAIN AIR
BLEED
SHUTTER
IDLE
ADJUSTMENT
INLET NEEDLE
AND SEAT
MA_N NOZZLE
FLOAT
_MAIN AJUSTMENT
FIG. 14
CHECK COMPRESSION
Remove spark plug and hold thumb over spark plug hole
while cranking engine. Compression should be sufficient
to push thumb off the opening. If compression appears low,
check for the following:
• Loose cylinder head bolts.
• Blown head gasket
• Worn or damaged engine.
Department.
Contact Sears Service
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