Cummins/Onan — Carburetor and Intake Manifold Assembly Disassembly
Repair & overhaul
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan NHEL
Before you start
- Bending fuel vaporizer tubing can weaken it.
Procedure
- Remove air cleaner assembly.
- Disconnect fuel line and governor rod.
- Remove intake manifold capscrews.
- Lift off carburetor and intake manifold assembly.
- Remove two intake manifold gaskets and cover ports.
- Unbolt carburetor from intake manifold.
- Reassemble in reverse with new gaskets.
Tools required
- wrench Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Full service-parts list: Cummins/Onan NHEL →
Source: Cummins/Onan service 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.