Kohler 12RES — Fuel Conversion Procedure (natural gas to LP vapor)
Installation · Fuel system
For the Kohler 12RES, from the Kohler service manual.
Applies to: Kohler 12RES
Before you start
- Explosive fuel vapors. Can cause severe injury or death. Use extreme care when handling, storing, and using fuels.
- Accidental starting. Can cause severe injury or death. Disconnect the battery cables before working on the generator set. Remove the negative (--) lead first when disconnecting the battery.
Procedure
- Place the generator set master switch in the OFF position.
- Disconnect the power to the battery charger.
- Disconnect the generator set engine starting battery, negative (--) lead first.
- Turn off the fuel supply.
- Remove the enclosure roof or end panel to gain access to the fuel system.
- Remove the hose clamp and fuel hose from the hose fitting in the regulator.
- Use a screwdriver to install the LP fuel jet into the elbow fitting.
- Slide the hose onto the hose fitting and secure it with the clamp.
- Disconnect the digital spark-advance module (DSAM) leads for LP.
- Connect and turn on the new fuel supply.
- Check that the generator set master switch is in the OFF position.
- Reconnect the generator set engine starting battery leads, negative (--) lead last.
- Reconnect power to the battery charger.
- Start the generator set by moving the generator set master switch to the RUN position.
- Check for leaks using a gas leak detector.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- LP fuel jet part number 24 337 35
- DSAM leads: connect for natural gas, disconnect for LP
Full service-parts list: Kohler 12RES →
Source: Kohler service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.