Generac MFH500 — Adding Coolant
Maintenance · Radiator
For the Generac MFH500, from the Generac owner's manual.
Applies to: Generac MFH500, Isuzu 4JJ1TT4 engine
Before you start
- Risk of burns. Do not open coolant system until engine has completely cooled.
Procedure
- Verify the engine is stopped and cooled.
- Remove radiator cap.
- Fill the radiator slowly with coolant until it reaches the filler neck.
- Operate the engine approximately five minutes at a low idle speed to bleed air.
- Stop the engine, allow it to cool, and add coolant as needed.
Full service-parts list: Generac MFH500 →, Isuzu 4JJ1TT4 engine →
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.