Kohler KG80 Maintenance Manual page 25

For KG150, KG180, and KG200 (Kohler Engine KG10V08T), use the following:
To change the fuel type, change the wiring harness connections. The engine ECM has fuel tables and spark advance curves
programmed for both natural gas and LPG. Use the following fuel connection tables and wiring diagrams to determine the
applicable connections for your generator set model. Be sure to review the wiring diagram for special applications.
Note:
KG150 engines ordered for use with natural gas cannot be converted to operate with LPG fuel.
For Single Fuel Connections with either APM402 or APM603, use the following:
See Figure 6 and Figure 7.
Natural Gas Operation

Disconnect the black fuel connector (J7).

Disconnect 49 and N17.

Connect the white fuel connector (J8).

For UL applications, connect the optional UL fuel blocking valve (J30).
LPG Vapor Operation

Disconnect the white fuel connector (J8).

Connect the black fuel connector (J7).

Connect 49 and N17.

For UL applications, connect the optional UL fuel blocking valve (J30).
Harness
White Connector (P8)
N17
49
49a
Black Connector (P7)
63
N16
White Connector (P30)
49B
LP1
N17A
N17B
Figure 6 Gaseous Fuel Electrical Connections, Single Fuel
TP-7173 10/20
Natural Gas
NG fuel valve (J8)
not used
not used
not used
not used LPG fuel valve (J7)
LFP1- NC, Optional alarm
LFP1- COM, Optional alarm
Optional blocking fuel valve for UL requirements
not used, Auto Changeover Only
not used, Auto Changeover Only
not used, Auto Changeover Only
not used, Auto Changeover Only
LPG Vapor
not used
49 (QCON 10)
N17 (QCON 9)
not used
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