Fuel Conversion, 8.5/12 Kw - Kohler 18TRES Installation Manual

1.7.1

Fuel Conversion, 8.5/12 kW

Two fuel connections on the fuel block 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.
Note: Do not adjust the factory-sealed fuel-metering
adjustments on the fuel block. Changing the fuel-
metering adjustments may violate federal or state
laws.
Use the following procedure to convert from natural gas
(NG) to LP vapor, moving the fuel connection from the
natural gas to the LP port, plugging the natural gas port,
and disconnecting the leads for the digital spark
advance ignition (DSAI). See Figure 1-21 for the fuel
system component locations.
1. DSAI connector location
2. Fuel block
3. Fuel inlet, 1/2 in. NPT female
Figure 1-21 Fuel System Locations, 8.5/12 kW
Procedure to convert from NG to LP, 8.5/12 kW
1. Place the generator set master switch in the OFF
position.
2. Disconnect the power to the battery charger.
3. Disconnect the generator set engine starting
battery, negative (--) lead first.
TP-6514 9/09
1 2
3
GM29253
4. Turn off the fuel supply.
5. Remove the hose clamp and fuel hose from the
hose fitting in the fuel block. See Figure 1-22.
1
5
4
1. Fuel block
2. Fuel metering valves—factory-sealed, do not adjust
3. Fuel inlet, 1/2 in. NPT
4. Hose fitting
5. Plug
Figure 1-22 Fuel Block, 8.5/12 kW
6. Remove the hose fitting from the natural gas outlet
port in the fuel block. See Figure 1-22.
7. Remove the plug from the LP port in the fuel block.
See Figure 1-22. Clean the plug with a dry cloth or
brush, apply fresh pipe sealant, and install the plug
into the natural gas outlet port.
8. Clean the hose fitting with a dry cloth or brush,
apply fresh pipe sealant to the threads, and install
the fitting into the LP port.
Note: Do not adjust the fuel metering valves.
9. Slide the hose onto the hose fitting and secure it
with the clamp.
2
Natural gas
setup shown
3
tp6195
Section 1 Installation 25