TP-5986 4/03 11Section 4 Fuel System
4.5.3 Flooding
Flooding occurs from a float level set too high,
improperly adjusted fuel pressure, improperly installed
fuel pump, a sticking choke plate or float, or a fuel inlet
needle held off its seat either by improper seating or dirt
particles. A punctured or leaking float admitting fuel
becomes gas-logged causing a heavy float, high fuel
level, and flooding.
If flooding occurs, disassemble the carburetor, observe
the operation and condition of components, and repair
or replace components as necessary.
4.5.4 Hunting
A low fuel level because of an improperly adjusted float,
a clogged main jet, restricted main jet passages, or an
improperly sized main jet for the application can cause
hunting. Clean, adjust, or replace inoperative
components.
An incorrect throttle linkage adjustment, a binding
throttle linkage, a sticking throttle shaft, or a loose
throttle shaft in the throttle body or bore can cause
inconsistent idle speed.
4.5.5 Leaking Carburetor
Loose fuel connections, a cracked carburetor body, a
sticking fuel inlet needle, or an inoperative float can
cause a leaking carburetor. Adjust, repair, or replace the
affected components.
4.6 Governor 60 Hz to 50 Hz
Conversion
Governors are adjusted at the factory and further
adjustments should not be necessary.
Note: Never tamper with the governor settings to
increase the generator output. Overspeeding
can cause equipment parts to exceed design
limitations, resulting in component failure.
Governor 60 Hz to 50 Hz Conversion Procedure
1. Change the spring to the 50 Hz position. See
Figure 4-3.
2. Adjust the generator frequency using a frequency
meter. Set the no load speed at 52.5 Hz for 50 Hz
operation or 63 Hz for 60 Hz operation.
3. Replace the governor speed adjusting bolt. The
50 Hz bolt is X-6284-7 and is 65 mm long. The
60 Hz bolt is M933-5050-60 and is 50 mm long.
4. Adjust the voltage regulator volt/Hz rolloff point.
Refer to Section 7.2.2.
598643
1
2
3
4
1. 60 Hz governor spring position
2. 50 Hz governor spring position
3. Governor arm
4. Governor speed adjusting bolt (X-6284-7 for 50 Hz,
M933-5050-60 for 60 Hz)
Figure 4-3 Governor 60 Hz to 50 Hz Conversion
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