Generac — Reconfiguring the Fuel System from NG to LP
Operation
From a Generac owner's manual — check it applies to your exact model before use.
Applies to: Generac GH-410 engine, Generac GT-530 engine, Generac GT-990 engine, Generac GT-999 engine
Before you start
- Gaseous fuels such as natural gas and liquid propane (LP) gas are highly explosive.
Procedure
- Turn off the main gas supply (if connected).
- Open the roof and remove the door.
- Remove the battery (if installed).
- Take the plastic T-handle fuel selector supplied with the generator.
- Locate the selector knob on the air box cover.
- Insert the pin end into the hole in the selector knob and pull out to overcome spring pressure.
- Twist clockwise 90 degrees and allow the selector to return once aligned with the LP position.
- Save the tool with the Owner's Manual.
- Install the battery, door and close the roof.
Tools required
- Plastic T-handle fuel selector Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Fuel pressure 10 to 12 inches of water column (0.36 to 0.43 psi) to the fuel inlet
Source: Generac owner's 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.