Generac GT-990 — Reconfiguring The Fuel System (9, 10, 13, 16, 18 kW V-twin Engines)

Adjustments

For the Generac GT-990, from the Generac service manual.

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Procedure

1. Open the roof.
2. For 9/10 kW: loosen clamp and slide back air inlet hose; slide fuel selector out toward back; return hose and tighten clamp.
3. For 13/16/18 kW: remove air cleaner cover; slide selector lever out toward back; return cover and tighten thumb screws.
4. Close the roof.
5. Reverse procedure to convert back to natural gas.

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.

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