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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
20).
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 21).
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 _rottle
control to Me
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
Figure 20
Governor Control Rack
Casing Clamp Screw
Figure 21
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 20).
3.
Rotate the carburetor throttle control lever against the idle
speed screw and hold it (see Figure 22). 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.
Idle Speed
Screw
Figure 22
5.
Then, position idle idle mixture valve in middle of travel.
F-040607L
24
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