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SERVICE AND ADJUSTMENT
HOW TO ADJUST
THE REMOTE
THROTTLE
CONTROL
For the best engine performance, set the remote throttle control as
follows.
1.
Move the remote
throttle
control
to the FAST
position
(see
Figure
22).
2.
The hole in the governor
control lever (located just behind gov-
ernor control
plate)
must align with the hole
in the governor
control
plate
(see Figure 23).
3.
If the two holes do not line up, then loosen
the casing
clamp
screw
and move the governor
control
rack until the two holes
are aligned.
4.
Tighten
the casing
clamp
screw.
5.
Check the operation
of the throttle.
Move the throttle control to the
STOP position.
6.
The governor
control
lever
must make good contact
with stop
switch
(if equipped).
Readjust
if necessary.
IMPORTANT: Do not change the engine governor. If the engine
governor needs an adjustment, go to the nearest Sears Service
Center. They have the equipment and experience to make the
adjustment.
CHOKE
FAST
Remote Throttle
Control
SLOW
Governor Control Lever
Hole In Governor
Control Plate
Stop Switch
Figure 22
Governor Control Rack
Casing Clamp Screw
Figure 23
HOW TO ADJUST
THE CARBURETOR
Differences
in fuel, temperature,
altitude
or load may require
minor
carburetor
adjustment.
The
air cleaner
and
its
cover
must
be
assembled
to carburetor
before starting engine.
The carburetor
on this engine
is equipped
with an idle mixture
valve
with a limiter (see inset), which allows
some minor adjustment,
and
an idle speed
adjustment
screw.
1.
To adjust idle speed, start engine
and warm up about 5 minutes.
2.
With engine
running,
put the remote
throttle
control
in SLOW
position
(see Figure
22).
3.
Rotate
the carburetor
throttle
control
lever
against
the idle
speed
screw
and hold it (see
Figure 24). Then,
turn the idle
speed
screw
to obtain
1750 rpm (use a tachometer).
4.
Rotate
the idle mixture
valve
full travel
clockwise
and then
counterclockwise.
NOTE:
DO NOT remove
limiter
caps. DO NOT force
beyond
limits.
6.
Move the remote
throttle
control
to the FAST
position.
The
engine
should
accelerate
smoothly.
If it does not, adjust the idle
mixture
valve
counterclockwise
1/8 turn.
NOTE: Engines operated at approximately 3000 to 5000 feet (900
to 1500 meters) above sea level may require a high altitude
carburetor nozzle. If erratic performance is observed, contact a
Sears Service Center for cost to install or to purchase a high
altitude carburetor nozzle.
Throttle
Lever
Idle Speed
Screw
Idle Mixture
Valve With
Limiter
!
@
Figure 24
5.
Then, position
idle idle mixture
valve
in middle
oftravel.
F-040603L
25
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