Generac MFH500 — Removing Water From Fuel
Maintenance · Water sedimenter
For the Generac MFH500, from the Generac owner's manual.
Applies to: Generac MFH500, Isuzu 4JJ1TT4 engine
Before you start
- Do not over-tighten the air bleeding plug.
- Do not use an alcoholic water remover.
Procedure
- Loosen the air bleeding plug at the top of the water sedimenter, then loosen the drain plug at the bottom of the case.
- Drain the water into a suitable container and dispose of it.
- After draining, tighten the air bleeding plug and the drain plug.
Tools required
- Suitable container Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Air bleeding plug torque: 69.9–103.6 in-lbs (7.9–11.7 Nm)
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.