ADJUSTMENTS
CARBURETOR
The carburetor has a main fuel (high speed) adjust-
ment and an idle fuel adjustment. The main adjust-
ment affects operation under heavy load conditions
(Figure 5). Idle adjustment affects operation under
light or no load conditions. Under normal cir-
cumstances, factory carburetor adjustments should
not be disturbed. If the adjustments have been
disturbed,
turn needles off their seats, 1 to 1-1/4 turn
to permit starting. Then, readjust them for smooth
operation.
Damage will result if the needle is forced
against its seat. The needle does not com-
pletely shut off fuel when tumed fully in.
BREAKER
POINTS (Cold Setting)
To maintain maximum engine efficiency, change the
breaker points every 200 hours of operation. Proceed
as follows when the engine is
cold:
1.
Remove the four screws and cover of the control
box.
2.
Disconnect the wire lead that runs from the
control box to the ignition
coil.
3. Remove the seven fasteners as shown in Figure6,
then remove the front panel.
4.
Loosen both screws holding the lifting eye. Then,
remove one of the screws and swing lifting eye
out of the way to gain access to the breaker box.
Before final adjustment, allow the engine to reach
normal operating temperature. Make the idle adjust-
ment under no
load.
Open the main jet until the
engine runs smooth under acceleration with no
load.
Slightly more fuel may be needed when sudden load
is applied (open about 1/4 tum further).
Set the throttle stop screw (located on carburetor
throttle lever) with no load connected and while
running at a low speed setting. Turn the screw to give
approximately
1/32-inch
clearance between the
screw and pin.
If the engine develops a "hunting" condition (alter-
nate increase and decrease of engine speed), try
correcting by opening the main adjusting needle a
littleTnore. Do not open more than 1/2 turn beyond
the maxifrrum point of power.
LOW SPEED SET
ON GOVERNOR
LINKAGE- SMALL
GAP HERE AT NO
LOAD „|
THROTTLE
STOP
SCREW
SIDE VIEW
MAIN FUEL
(HIGH SPEED)
ADJUSTMENT
IDLE
ADJUSTMENT
REAR VIEW
ii i'/Mm a/ ///,
FIGURE 6. REMOVING FASTENERS
5. Remove the two screws and the cover on the
breaker box.
6.
7.
FIGURE 5. CARBURETOR ADJUSTMENT
Remove the two spark plugs so engine crankshaft
can be easily rotated by hand. Check condition of
spark plugs at this time.
Remove mounting nut (A) and pull the points out
of the box just far enough so screw (B) can be
removed and the leads disconnected. See Figure
7.
15
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