Generac GT-990 — Reconfiguring the Fuel System (NG to LP)
Adjustments
For the Generac GT-990, from the Generac service manual.
Applies to: Generac GT-990 engine
Before you start
- The primary regulator for the propane supply is NOT INCLUDED with the generator.
Procedure
- Open the roof.
- Return the inlet hose and tighten clamp securely.
- Remove the air cleaner cover.
- Slide the fuel selector lever out towards the back of the enclosure.
- Return the air cleaner cover and tighten the two thumb screws.
- Close the roof.
- Reverse the procedure to convert back to natural gas.
Specs & values
- A fuel pressure of 0.0178 to 0.0305 kg/cm2 (10 to 12 inches of water column) to the fuel inlet of the generator must be supplied for LP
Source: Generac 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.