174 Section 9 Gas Fuel Systems TP-6356 4/12
GM14257-C
1. Fuel mixer
2. Fuel regulator (inverted position)
3. Fuel line elbow
4. Fuel line
5. Fuel line union connector
1
2
3
4
5
Figure 9-21 LP Gas Vapor Fuel System Configuration
Save the original gas mixer diaphragm (50--100 kW),
fuel regulator spring, and adjustment screw for possible
future conversion back to natural gas.
Note: When converting the 50--100 kW models, order
kit GM17010-KP1, which contains the LP gas
mixer diaphragm.
30--45 kW Models (4.3 L GM Engine). Use the
following procedure except for step 2, Convert the gas
mixer for LP gas vapor. The 30--45 kW generator set
(General Motors 4.3 L engine) does not require a fuel
diaphragm conversion; therefore, no kit is necessary.
Refer to the respective spec sheet for generator set
ratings based on fuel selection.
50/60 kW Models (5.7 L GM Engine). Use the following
procedure. Refer to the respective spec sheet for
generator set ratings based on fuel selection.
80/100 kW Models (8.1 L GM Engine). Use the
following procedure except for step 5, Change the
engine ignition timing. The 80/100 kW generator set
(General Motors 8.1 L engine) does not require an
engine ignition timing adjustment. Refer to the
respective specification sheet for generator set ratings
based on fuel selection and derate the specification
sheet LP fuel ratings by 2%.
Note: No ratings derate is necessary for the 80/100 kW
models with LP fuel when ignition module part no.
GM19765 is installed. Order the ignition module
for LP fuel through the Aftermarket Parts Dept.
1. Remove the generator set from service.
a. Place the generator set master switch in the
OFF position.
b. Disconnect the power to the battery charger, if
equipped.
c. Disconnect the generator set engine starting
battery(ies), negative (--) lead first.
d. Close all fuel supply valves.
2. Convert the gas mixer for LP gas vapor (50--
100 kW models only).
a. Remove the five gas mixer cover plate screws.
See Figure 9-22. Be aware that there is a
spring under the gas mixer diaphragm, that
may cause the cover plate and mixer
diaphragm to pop up when the screws are
loosened and removed.
GM14257-C
1. Fuel mixer
2. Fuel mixer cover plate
3. Fuel regulator
4. Fuel line elbow
5. Fuel mixer adjustment screw
1
2
3
4
5
Figure 9-22 Fuel Mixer
b. Remove the gas mixer cover plate and natural
gas fuel diaphragm. See Figure 9-23. Save
the natural gas fuel diaphragm for possible
future conversion back to natural gas.
GM17009-
Figure 9-23 Fuel Diaphragm
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