Generac — Out of Service Protection (Storage)
Maintenance · Generator
From a Generac owner's manual covering: 9592, GN-570, Q-55G, Q-70G. Check it applies to your exact model before use.
Applies to: Generac 9592, Generac Q-55G, Generac GN-480 engine, Generac GN-570 engine
Procedure
- Start the engine and let it warm up.
- Close the fuel shutoff valve and let the engine run out of gas.
- While engine is still warm, drain the oil completely.
- Refill crankcase with SAE 10W-30 oil having API classification 'For Service SF'.
- Attach a tag to the engine indicating the oil viscosity and classification.
- Remove spark plugs; pour two or three tablespoons of clean engine oil into openings.
- Crank engine several times to distribute oil, then install and tighten spark plugs.
- Remove the battery and store in a cool, dry room on a wooden board.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Use if generator cannot be exercised every seven days and is out of service longer than 30 days
Full service-parts list: Generac 9592 →, Generac Q-55G →
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.