Generac 3.9 Liter Gas Engine — Maintenance

For the Generac 3.9 Liter Gas Engine.

Applies to: Generac 3 9 Liter Gas Engine

Procedure

1. Start and exercise the unit at full rated load (use a load bank if the site load is not enough) for at least 2 hours looking for leaks, loose connections or components, and abnormal operating conditions.
2. Change the engine oil.
3. Replace the engine oil filter(s).
4. Replace the engine air filter(s).
5. Replace the engine fuel filter(s) on diesel engine driven units and re-prime the fuel system.
6. Check the engine spark plugs on gas engine driven units. Clean and re-gap or replace as necessary.
7. Perform a 5 minute no-load operational run of the unit looking for any post service problems.
8. Return the unit to standby setup for operation when required.

Source: manual:3.9L_0E9755.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.