THROTTLE STOP SCREW
IDLE ADJUSTMENT
FIGURE 10. CARBURETOR ADJUSTMENTS
CARBURETOR,
GASOLINE
The carburetor (Figure 10) has a fuel main (high
speed) adjustment and a fuel idle adjustment. The
main adjustment affects operation under heavy load
conditions. Idle adjustment affects operation at light
or no
load.
Under normal circumstances, factory
carburetor adjustments should not be disturbed. If
the adjustments have been disturbed, turn needles off
their seats,
1
to 1-1/2 turns to permit starting, then re-
adjust them for smooth operation.
>A
LOOSEN THESE
SCREWS AND
ROTATE THE
ENTIRE COVER
ASSEMBLY
Q^yyiQN j Forcing the needle against its seat will
damage it. The needle does not completely
shut off fuel when tumed fully in.
Before final adjustment, allow engine to warm up.
Make idle adjustment with no load connected to the
generator. Use a tachometer (or connect a frequency
meter) to generator output. Slowly turn idle adjust-
ment out until engine speed (orgeneratorfrequency)
drops slightly below normal. Then turn needle in until
speed (or frequency) returns to normal.
To set fuel main adjustment, apply a full electrical
load to the generator. Carefully turn main adjustment
screw in until engine speed (or output frequency)
drops slightly below normal. Then turn needle out
until speed (or frequency) returns to normal. Proper
carburetor adjustment cannot be assured unless the
governor is properly adjusted.
Set throttle stop screw (located dn carburetorthrottle
lever) with no load connected and while running at
rated speed. Turn the screw to give
1/32-inch
clearance between the screw and pin (Figure 10).
FIGURE 11. CHOKE ADJUSTMENT
13
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