Generac GT-990 — Reconfiguring The Fuel System (6/7 kW, 410cc Engine)
Adjustments
For the Generac GT-990, from the Generac service manual.
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Before you start
- Use approved pipe sealant or joint compound on all threaded fittings.
Procedure
- Turn off main gas supply.
- Open roof and remove door.
- Remove battery if installed.
- Disconnect Wire 0 and Wire 14 from gas solenoid.
- Remove carburetor fuel hose from demand regulator outlet.
- Remove demand regulator mounting fastener.
- Swap pipe plug and brass hose barb between outlet ports.
- Reverse steps to reinstall demand regulator.
- Insert plastic plug into 3/4 inch hole on air cleaner base.
- Check for gas leakage at plug, hose, and fittings.
Specs & values
- Fuel pressure 11 to 14 inches water column 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.