Generac — Changing the Oil and Oil Filter

Maintenance · Engine oil and oil filter

From a Generac owner's manual — check it applies to your exact model before use.

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Procedure

1. Press the MANUAL button on the control panel to start the engine.
2. Run the engine until it is thoroughly warmed up.
3. Press the OFF button to shut down the engine.
4. Allow the engine to cool slightly.
5. Lift the lid and remove the front panel.
6. Pull the oil drain hose free of its retaining clip.
7. Remove the cap from the hose and drain the oil into a suitable container.
8. Replace the cap after draining and secure the hose with the retaining clip.
9. Remove the old oil filter by turning it counterclockwise.
10. Apply a light coating of clean engine oil to the gasket of the new filter.
11. Screw the new filter on by hand until its gasket lightly contacts, then tighten an additional 3/4 to one full turn.
12. Refill the engine with the proper recommended oil.
13. Press the MANUAL button to start the engine and run for one minute.
14. Check for leaks and press the OFF button to stop the engine.
15. Wait five minutes and recheck the oil level.

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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