Generac — Oil & Oil Filter Change Procedure
Maintenance · Engine oil system
From a Generac owner's manual — check it applies to your exact model before use.
Applies to: Generac GH-410 engine, Generac GT-530 engine, Generac GT-990 engine, Generac GT-999 engine
Before you start
- Hot oil may cause burns. Allow engine to cool before draining oil.
Procedure
- Start engine and run until thoroughly warmed up, then shut OFF.
- Pull oil drain hose free of retaining clip, remove cap and drain oil.
- Replace cap and retain hose in clip.
- Remove old oil filter by turning counterclockwise.
- Apply clean engine oil to gasket of new filter.
- Screw new filter on by hand until gasket contacts adapter, then tighten an additional 3/4 to one turn.
- Refill with recommended oil.
- Start engine, run one minute, and check for leaks.
- Shutdown and recheck oil level, add as needed. DO NOT OVER FILL.
- Reset AUTO/OFF/MANUAL switch to AUTO.
- Dispose of used oil at a proper collection center.
Specs & values
- Oil filter part # 070185F Amazon eBay $18.50 NAPA $9.09
- Tighten filter an additional 3/4 to one turn after gasket contact
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.