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Generac QT 3.9L 40kW — Engine Start-up and Transfer (Manual Transfer Switch)

Operation · Generator and transfer switch

For the Generac QT 3.9L 40kW, from the Generac owner's manual.

Applies to: Generac QT 3.9L 40kW, Generac QT Series, Generac V-type engine

Before you start

  • Do not crank the engine continuously for longer than 30 seconds.
  • Do not attempt manual operation until all power supplies to the transfer switch are positively turned off.

Procedure

  1. Turn OFF or disconnect utility power circuit to the transfer switch.
  2. Set transfer handle to UTILITY (NORMAL) position.
  3. Set generator main line circuit breaker to OFF (or OPEN).
  4. Start the generator; let engine stabilize and warm up.
  5. Move transfer switch manual handle to STANDBY (GENERATOR) position.
  6. Set generator main line circuit breaker to ON (or CLOSED).

Full service-parts list: Generac QT 3.9L 40kW →, Generac QT Series →

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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