Generac — Removal From Service (Out of Service Procedure)
Maintenance · generator
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
- If generator cannot be exercised every 7 days and will be out of service longer than 90 days, prepare for storage
Procedure
- Start engine and let it warm up
- Close the fuel shutoff valve and allow unit to shut down
- Set Main Circuit Breaker to Off (Open)
- Turn off utility power to the transfer switch
- Remove the 7.5 Amp fuse from the Control Panel
- Disconnect battery cables, negative first
- Remove battery charger AC input T1/Neutral cable at controller
- While engine is still warm, drain oil completely, then refill crankcase with oil
- Attach a tag indicating viscosity/classification of the new oil
- Remove spark plug(s), spray fogging agent into threaded openings, reinstall and tighten
- Remove battery and store in a cool, dry room on a wooden board
- Clean and wipe down the entire generator
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.