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Generac QT 1.6L 25kW — Reconfiguring the Fuel System (NG to LP)

Adjustments · Demand regulator / carburetor fuel hose

For the Generac QT 1.6L 25kW, from the Generac owner's manual.

Applies to: Generac QT 1.6L 25kW, Generac In Line engine

Before you start

  • Serious injury or damage may occur if not configured properly. Please consult an Authorized Dealer with any questions.

Procedure

  1. Turn the main gas supply off.
  2. Remove the carburetor fuel hose from the outlet port (Port 1) of the demand regulator.
  3. Remove the brass hose fitting from the outlet port (Port 1) of the demand regulator.
  4. Remove pipe plug from Port 2.
  5. Install brass hose fitting into Port 2.
  6. Install pipe plug into Port 1.
  7. Connect carburetor gas hose to brass fitting.
  8. Tighten all clamps and plugs.
  9. Make sure fuel supply is of the proper pressure and type for configuration.
  10. Reverse the procedure to convert back to natural gas.
  11. The Dip switch inside the control panel must be in the LP or NG position when switching to different fuels.

Specs & values

  • Port 1 is for NG only and Port 2 is for LP vapor only. No provision for dual fuel has been made.

Full service-parts list: Generac QT 1.6L 25kW →

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.

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