Fuel Conversion - Kohler 8.5RES Service

The fuel lock-off prevents fuel flow when the engine is
not operating. See Figure 6-35. Do not try to adjust the
fuel pressure, fuel mixture, or engine speed using the
fuel lock-off.
Checking the Fuel Pressure
Use a gauge or manometer to check the fuel pressure at
the secondary regulator inlet.
Measure the fuel pressure with the generator set
running at rated load. Verify that the fuel pressure is
within the range shown in Figure 6-34. Contact the fuel
supplier if the inlet pressure is not within the specified
range.
Fuel Type
Natural Gas
LP
Figure 6-34 Fuel Supply Pressure
2
1
1. Hose fitting
2. Plug
3. Fuel metering valve (factory-sealed, do not adjust)
4. Secondary regulator
Figure 6-35 Fuel Regulator, Fuel Metering Valve, and Fuel Solenoid Valve
94 Section 6 Component Testing and Adjustment
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See Figure 6-35.
Supply Pressure
kPa (in. water column)
1.2--2.7 (5--11)
1.7--2.7 (7--11)
3
4
7
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6.12.4 Fuel Conversion

The multi-fuel system allows conversion from natural
gas to LP vapor (or vice-versa) in the field while
maintaining emissions-standard compliance. A trained
technician or authorized distributor/dealer can convert
the fuel system.
Two fuel connections on the fuel metering valve allow
field conversion between natural gas and LP vapor. The
fuel metering valves are factory-set and sealed to
comply with applicable emission standards and to
provide the best possible hot and cold starting.
8
5
6
Regulator, Side View
5. Fuel solenoid valve
6. Fuel inlet, 1/2 in. NPT
7. Fuel lockoff (do not adjust)
8. Inlet pressure check location
TP-6196
TP-6196 10/09