Genuine Cummins Onan 12V DC low-pressure replacement fuel pump with wiring for select Onan RV generator fuel systems.
The Cummins Onan A076A383 is a replacement low-pressure electric fuel pump used on select Onan RV generator models. A weak, failed, or intermittent fuel pump can prevent the generator from receiving a steady fuel supply, which may cause hard starting, no-start conditions, shutdowns, or poor running.
This pump is commonly listed for Onan QC Series, Emerald Advantage, and Marquis 5.5HGJ model RV generators. It also replaces several earlier Onan fuel pump part numbers, including A064S965, A047N929, A029F887, and 149-2620.
Low-pressure 12V DC fuel pump for compatible Onan RV generator applications
Designed and engineered specifically for supported Cummins Onan generators
Supersedes A064S965, A047N929, A029F887, and 149-2620
Package is commonly listed as including the A076A383 fuel pump with wiring
This fuel pump is not universal for every Onan generator. It is commonly listed for Onan QC Series, Emerald Advantage, and Marquis 5.5HGJ model RV generators, but generator model and spec letter should still be verified before ordering. Fuel delivery issues can also be caused by a clogged fuel filter, old fuel, cracked fuel line, low RV fuel level, carburetor problems, wiring issues, or a generator control fault.
Before Starting: Shut down the generator, allow it to cool, disconnect starting power as required, and follow all fuel system safety precautions. Work in a well-ventilated area away from sparks, flames, and ignition sources. Basic Replacement Steps: 1. Confirm Compatibility: Verify generator model, spec letter, and existing fuel pump part number before removing parts. 2. Secure the Fuel System: Follow the generator service procedure and prepare for possible fuel drips during pump removal. 3. Document Wiring and Fuel Lines: Take clear photos of the pump wiring and fuel line routing before disconnecting anything. 4. Disconnect Old Pump: Carefully disconnect the electrical connector/wiring and fuel lines from the old pump. 5. Remove Pump: Remove the existing fuel pump from its mounting location. 6. Install Replacement Pump: Mount the new pump in the correct orientation and reconnect fuel lines and wiring. 7. Check for Leaks: Prime or run the generator according to the service procedure and inspect all fuel connections. 8. Test Operation: Start the generator and confirm stable running under appropriate load.
Package Contents: • Cummins Onan A076A383 fuel pump • Wiring attached/supplied with pump assembly NOT Included — May Also Need: • Fuel filter • Fuel line or clamps • Mounting hardware, if existing hardware is damaged • Electrical connectors or terminals, if existing wiring is damaged • Carburetor or other fuel system service parts Inspect the fuel filter, fuel lines, clamps, wiring, and connections before replacing the pump. Additional parts may be required depending on the generator condition.
To confirm compatibility before ordering, have the following ready: • Generator model number • Spec letter • Serial number • Existing fuel pump part number, if visible • Fuel type and generator series • Description of the generator symptom being diagnosed Why this matters: Onan fuel pumps vary by generator model, spec, and fuel system configuration. Matching the old pump number and generator nameplate helps avoid ordering a pump that looks similar but does not match the application.
Match this fuel pump by generator model, spec letter, and original pump number whenever possible. Fuel pump fitment should not be confirmed by appearance alone.
Fuel system issues should be diagnosed carefully before replacing parts. A generator that runs poorly may have a pump issue, but fuel filters, fuel lines, carburetor condition, wiring, and fuel quality should also be checked.