SERVICE AND ADJUSTMENTS
ENGINE SPEED
CAUTION: ENGINE SPEED WAS PROPERLY AD-
JUSTED AT THE FACTORY AND SHOULD RE-
QUIRE NO ADDITIONAL ADJUSTMENT.
DO NOT
AI"rEMPT TO CHANGE ENGINE SPEED. IF YOU
BEUEVE THE ENGINE IS RUNNING TOO FAST OR
TOO SLOW,
TAKE
YOUR GENERATOR
TO
AUTHORIZED
SERVICE CENTER FOR REPAIR
ANO ADJUSTMENT.
CHANGING ENGINE GOV-
ERNED SPEED WILL VOID ENGINE WARRANTY.
Your generator runs at • constant speed.
This constant
operating speed is maintained by a mechanical, flyweight
type, fixed speed governor.
DO NOT try to adjust the
govemed speed setting for the following reasons:
•
High engine speeds are dangerous and increase the
dsk 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 AC frequency
and voltage only at the proper speed. Some connected
electrical devices could be damaged by incorrect fre-
quency and/or voltage.
ADJUSTING
THE CARBURETOR
The carburetor of your generator set is preset at the factory.
DO NOT TAMPER WITH THE CARBURETOR
as this will
void the warranty for the emission control system. If your
generator is to be used at an altitude above 5,000 feet,
consult with a Sears Authorized Service Facility regarding
high altitude jetting changes.
ADJUSTING
VALVE CLEARANCE
After the first 50 hours of operation, you should adjust the
valve clearance in the engine.
When adjusting valve clearanca, the engine should be at
room temperature and the piston should be at Top Dead
Center
('rDC)
of its compression
stroke (both valves
closed).
Correct clearance is 0.05-0.1mm.
Adjust valve
clearance as follows:
•
Loosen the rocker arm jam nut. Use an allen wrench
to turn the pivot ball stud while checking clearance
between the rocker arm and the valve stem with a feeler
gauge (Fig. 16).
•
When valve clearance is correct, hold pivot bell stud
with allen wrench and tighten rocker arm jam nut with
a crows foot. Tighten the jam nut to 65-85 =nch-pounds
torque.
After tightenin_,l the jam nut, recheck valve
clearance to make sure it did not change (Fig. 17).
ALLEN
FEELER
0 GAUGE
_LOOSEN
JAM NUT
FIG. 16
"F_jhten ]am nut to
65-85 inch-pounds
("/-10 N-m).
FIG. 17
1!