Generac NP-66G — Out of Service Protection (Storage)
Maintenance · Generator
For the Generac NP-66G, from the Generac owner's manual.
Applies to: Generac NP-66G, Generac GN-480 engine
Before you start
- Never store the battery on any concrete or wooden floor
Procedure
- Start engine and let it warm up.
- Close fuel shutoff valve and let engine run out of gas.
- While engine still warm, drain oil completely and refill with SAE 10W-30 API 'For Service SF' oil.
- Attach tag indicating oil viscosity and classification.
- Remove spark plugs, pour two or three tablespoons clean engine oil into openings, crank several times, reinstall plugs.
- Remove battery and store in cool, dry room on a wooden board.
- Clean and wipe the entire generator.
Specs & values
- Use if out of service longer than 30 days
Full service-parts list: Generac NP-66G →
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.