Generac 9734 / NP-66LPG — Out of Service Protection
Maintenance · generator
For the Generac 9734 / NP-66LPG, from the Generac owner's manual.
Applies to: Generac 9734, Generac NP-66LPG, Generac GN-480 engine
Before you start
- Never store the battery on any concrete or wooden floor
Procedure
- Start the engine and let it warm up.
- Close the fuel shutoff valve in the fuel supply line and let the engine run out of fuel.
- While the engine is warm, drain oil completely and refill crankcase with SAE 10W-30 'For Service SF' oil.
- Attach a tag to the engine indicating oil viscosity and classification.
- Remove spark plugs, pour two or three tablespoons clean engine oil into openings, crank several times, then install and tighten spark plugs.
- Remove the battery and store in a cool, dry room on a wooden board.
- Clean and wipe the entire generator.
Specs & values
- SAE 10W-30 Amazon eBay $54.99 'For Service SF'
Full service-parts list: Generac 9734 →, Generac NP-66LPG →
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.