Generac — Preparing Genset for Start-up
Installation · Generator set
From a Generac owner's manual covering: 4.6L 80kW, 5.4L 100kW, 6.8L 130kW, 6.8L 150kW, QT 6.8L 100kW. Check it applies to your exact model before use.
Applies to: Generac QT 6.8L 100kW, Generac V-type engine
Before you start
- Before working on the generator, ensure the AUTO/OFF/MANUAL switch is in the OFF position and the 120VAC supply to the battery charger is switched OFF.
Procedure
- Ensure that the 120VAC circuit breaker to the battery charger is open.
- Remove the fuse from the control panel (15 Amp ATO fuse).
- Connect the battery cables to the battery; attach negative battery cable last.
- Close the 120VAC circuit breaker to the battery charger.
- Measure the voltage at the battery before and after the charger is turned on.
- Verify all AC electrical connections are tight at the circuit breaker and transfer switch.
- Check all hoses, clamps and fittings for leaks or damage.
- Open the valve to the engine fuel line and bleed the fuel system of air.
Tools required
- Manometer Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Fuel pressure must be as listed in the Specifications
Full service-parts list: Generac QT 6.8L 100kW →
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.