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Cummins Onan

Cummins Onan A076A384 RV Generator Fuel Pump | QG 4000, KY J+, KYD

Cummins Onan A076A384 RV Generator Fuel Pump | QG 4000, KY J+, KYD

$281.50 USD
$281.50 USD
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Restore fuel delivery to your Cummins Onan RV generator with the Cummins Onan A076A384 Fuel Pump — a genuine low-pressure electric fuel pump for RV QG 4000, KY Spec J and later, and KYD series generators. Available at The RV Surplus.

⚠️ CRITICAL — Verify Spec Letter Before Ordering

This pump is NOT universal across all Onan generators. The KY series split at Spec J:

  • KY Spec J and LATER → A076A384 (this pump)
  • KY Spec A through H → different pump (149-2311-01) — DO NOT substitute

Find the spec letter on your generator's nameplate before ordering. The nameplate also lists the generator model and serial number — have all three handy if you need to call Cummins Onan to confirm fitment.

⭐ Commonly Listed Applications

  • Onan RV QG 4000
  • Onan KY Spec J and later
  • Onan KYD series generator applications

⭐ Part Number History — Supersedes Four Earlier Pumps

A076A384 is the current replacement for several older Onan fuel pump numbers. If your existing pump carries any of these, this is the correct supersession:

  • A064S966
  • A047N926
  • A029F889
  • 149-2311-02

⚠️ Before Replacing the Pump — Rule Out Other Fuel System Faults

Fuel pumps are a common blame target but often not the actual fault. Work through these first:

  • Clogged fuel filter — the cheapest fix of all, often overlooked
  • Stale or old fuel — gasoline degrades in months, especially with ethanol
  • Cracked or kinked fuel line — pulls air, chokes flow
  • Low RV fuel tank level — most RV generators cut off well above empty
  • Blown fuse, loose connector, or bad ground on the pump circuit
  • Carburetor issues — gummed jets won't pass fuel the pump is delivering
  • Generator control board faults — may be preventing pump run entirely

⭐ Fuel Pump Fitment Checklist

What to Verify Reference
Generator Family RV QG 4000 / KY / KYD applications
KY Spec Letter J or later ONLY — A-H uses different pump
Old Pump Part Number Should be A064S966, A047N926, A029F889, or 149-2311-02
Fuel System Type Low-pressure electric pump system
Other Fuel System Items Inspect filter, line, clamps, wiring before replacing

Do NOT confirm fuel pump fitment by appearance alone — pumps that look similar may have different pressure ratings or flow rates and will not work interchangeably.

⚠️ Fuel System Troubleshooting Guide

Symptom Possible Pump Issue Other Causes to Check
Cranks but won't start Pump not delivering fuel Low fuel level, clogged filter, stale fuel, carburetor, ignition, control fault
Starts then shuts down Weak pump failing under load Restricted line, clogged filter, overheating, low oil shutdown, carburetor, fault codes
No pump sound / no fuel Pump motor failed No power to pump, blown fuse, loose connector, bad ground, control board
Intermittent running Weak or heat-sensitive pump Fuel line air leak, dirty carburetor, loose wiring, tank vent issue, old fuel
Fuel leak near pump Pump body or fittings leaking Cracked line, loose clamp, damaged connector, deteriorated hose

⚠️ Installation Overview

Fuel system work requires fuel system safety. Work in a well-ventilated area away from sparks, flames, or ignition sources. Shut down the generator and allow it to cool fully before starting.

  1. Confirm compatibility — verify generator model, spec letter, and existing pump part number BEFORE removing anything
  2. Secure the fuel system per the generator service procedure; prepare for fuel drips
  3. Photograph wiring and fuel line routing before disconnecting anything — reference during reinstall
  4. Disconnect electrical connector and fuel lines from the old pump
  5. Remove existing pump from its mounting location
  6. Install new pump in correct orientation; reconnect fuel lines and wiring
  7. Prime or run per service procedure and inspect ALL fuel connections for leaks
  8. Start generator and confirm stable running under appropriate load

If you're not comfortable working on generator fuel systems, have a qualified RV technician perform the replacement.

What's Included

  • (1) Cummins Onan A076A384 fuel pump

NOT included — may also need: fuel filter, fuel line or clamps, mounting hardware (if existing is damaged), electrical connectors (if existing wiring is damaged), carburetor or other fuel system service parts. Inspect everything before you order.

⭐ Have These Ready If You Need to Call Cummins Onan

  • Generator model number
  • Spec letter
  • Serial number
  • Existing fuel pump part number, if visible
  • Fuel type and generator series
  • Description of the symptom you're diagnosing

Specifications

  • Brand: Cummins Onan
  • Part Number: A076A384
  • Component Type: RV Generator Fuel Pump
  • Pump Type: Low-Pressure Electric
  • Common Applications: Onan RV QG 4000, KY Spec J and Later, KYD Series
  • Supersedes: A064S966, A047N926, A029F889, 149-2311-02
  • ⚠️ KY Spec A-H Uses Different Pump: 149-2311-01 (do NOT substitute)
  • Unit Weight: ~1.13 lb
  • Universal Fit: No — verify generator model, spec letter, and existing pump number
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