Cummins Onan RV Generator Parts Guide

RV Onan Generator Parts Guide

Use this interactive guide to find OEM filters, spark plugs, and maintenance kits by generator model. Expand each section to view compatible parts and maintenance information for your Cummins Onan generator. Keeping up with regular maintenance ensures your generator runs efficiently and reliably while you're on the road.

Brand Name Model/Series Spec Letter Oil Filter Oil Capacity Air Filter Fuel Filter Glow Plug / Spark Plug Plug Wire Tune-Up Kit
KVDA–C—1 quartC140-2105149-2137167-0263-02—Electronic Ignition
KVA–M—1 quartC140-2105149-2137167-0263-02—Electronic Ignition
KVCA–C, F—1 quartC140-2105149-2137167-0263-02—Electronic Ignition
KYD 50 HzA–B—1.6 quartsC140-3280149-2457167-0305—Electronic Ignition
KYD 60 HzA–B—1.6 quartsC140-3280149-2457167-0275—Electronic Ignition
KY 50 HzB–H—1.6 quartsC140-3280149-2457167-0305—Electronic Ignition
KY 60 HzA—1.6 quartsC140-2609149-2457167-0275—Electronic Ignition
KY 60 HzB–H—1.6 quartsC140-3280149-2457167-0275—Electronic Ignition
HGJBBA—0.6 quartsA030Y328149-2661167-1652—Electronic Ignition
Brand Name Model/Series Spec Letter Oil Filter Oil Capacity Air Filter Fuel Filter Glow Plug / Spark Plug Plug Wire Tune-Up Kit
Carb - HGJAC LP Liquid/Vapor A–K 122-0836C 2 quartsC 140-3116C 149-2648H 167-1638H — Electronic Ignition
Carb - HGJAB LP Liquid/Vapor A–K 122-0836C 2 quartsC 140-3116C 149-2648H 167-1638H — Electronic Ignition
EFI - HGJAA LP Liquid/Vapor A–K 122-0836C 2 quartsC 140-3116C 147-0860H
149-2648H 		167-1638H — Electronic Ignition
Brand Name Model/Series Spec Letter Oil Filter Oil Capacity Air Filter Fuel Filter Glow Plug / Spark Plug Plug Wire Tune-Up Kit
HDKAH A–K 122-0833C 3 quartsC 140-2897I 149-2513I 185-5421 — —
L–N 147-0860I
HDKAK A–K 122-0833C 3 quartsC 140-2897I 149-2513I 185-5421 — —
L–N 147-0860I
HDKCA/CB A–F 122-0893E 5.9 quartsE 140-3071I 149-2513I 185-5990 — —
HDZAA A–C Clean every 1000 hrs 1.1 quartsE 140-4151 149-2834 — — —
Brand Name Model/Series Spec Letter Oil Filter Oil Capacity Air Filter Fuel Filter Glow Plug / Spark Plug Plug Wire Tune-Up Kit
HQDPA A–C 122-0833C 2.2 quartsC 140-2897I 147-0860I 185-5421 — —
Brand Name Model/Series Spec Letter Oil Filter Oil Capacity Air Filter Fuel Filter Glow Plug / Spark Plug Plug Wire Tune-Up Kit
BGE A–E 122-0645C 3.5 quartsC 140-2379C — 167-0272C 9" 167-1615-01/ 160-1378
BGE F 149-2279F 26" 167-1602 —
BGE G 122-0645C 3.5 quartsC 140-2379F 149-2279I 167-0272I 9" 167-1615-01/
26" 167-1602		 Electronic Ignition
BGE H 149-1353I
BGE J–P 122-0645C 3.5 quartsC 140-2379F 149-2333I 167-0272I — —
Brand Name Model/Series Spec Letter Oil Filter Oil Capacity Air Filter Fuel Filter Glow Plug / Spark Plug Plug Wire Tune-Up Kit
Gasoline/BGM A–F, G–H 122-0645C 3.5 quartsC 140-2379C 149-2279I
149-2341 		167-0272I 9" 167-1625-01 / 23" 167-1625-02 Electronic Ignition
Gasoline/NHM A–F, G–H 122-0800C 3.5 quartsC 140-2379C 149-2279I
149-2341I 		167-0272I 23" 167-1602 Electronic Ignition
LP/NHM All 122-0800C 3.5 quartsC 140-2379C 148-0898I 167-0272G 23" 167-1602 Electronic Ignition

Due to the number of legacy models, please refer to the specific operator's manual or contact our support team for clarification on compatible parts. Below are some commonly referenced models and their maintenance parts:

Model/Series Spec Oil Filter Air Filter Fuel Filter Spark Plug Plug Wire Notes
BF Power Drawer A 122-0645 140-1220 — 167-0262 167-1616-01 Use 312-0069 kit
BFA RV A–D 122-0645 140-0495 — 167-0237 167-1602 Also 167-0298 plug used
HDKAG A–G 185-5835 140-2842 A026K278 185-6623 — Includes models with 333-0805 glow plug

Recommended Maintenance Schedule

  • Oil & Oil Filter: Replace every 150 hours or annually.
  • Air Filter: Clean every 50 hours; replace every 100 hours.
  • Spark Plug: Inspect every 100 hours; replace every 300 hours.
  • Fuel Filter: Replace every 500 hours or two years.
  • Coolant (liquid-cooled models): Replace every 1,000 hours or two years.
  • Spark Arrestor: Clean every 150 hours or annually.

Troubleshooting Common Issues

  • Fault Code 14: Low oil pressure – check oil level and sensor.
  • Fault Code 36: Engine shutdown – inspect fuel supply and temperature.
  • Starting Problems: Check battery voltage, wiring, and starter relay.
  • Overheating: Clear air vents, inspect cooling fan and coolant levels.

Expert Generator Care Tips

  • Run your generator monthly for 30+ minutes under load to prevent fuel and battery issues.
  • Use fresh fuel with a stabilizer if storing the RV for more than 30 days.
  • Never overload the generator—monitor total wattage draw.
  • Drain fuel or add stabilizer before off-season storage; disconnect the battery to prevent drain.

Oil and Maintenance Chemicals

OnaMax™ 15W40 Oil

Maximum protection engine oil formulated to reduce consumption and engine wear due to high temperature oil oxidation and viscosity increase. View Product

Onagard Storage Fogging Spray

Protects small engines and other mechanical equipment during off-season storage. View Product