Service parts for the El 40V
Grouped by system, with how many of each the parts manual calls for.
Air intake
1 requiredFuel system
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
Ratings spec sheet not in our library yet — see the documents below.
Maintenance & consumables
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Air Filter Housing | 965-0166 | Amazon eBay | ||
| Fuel filter | Fuel Filter | 149-2356 | Amazon eBay | ||
| Oil filter | — | ||||
| Battery | — | ||||
| Belt | — | ||||
| Coolant | — | ||||
| Oil | — | 5 hr | |||
| Spark plug | — |
Common questions
What fuel filter does the Cummins/Onan El 40V use?
The Cummins/Onan El 40V uses fuel filter part number 149-2356.
What air filter does the Cummins/Onan El 40V use?
The Cummins/Onan El 40V uses air filter part number 965-0166.
Troubleshooting
6Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| Fails to crank | Bad battery cable connection | Check battery cable connections |
| Fails to crank | Low battery | Check electrolyte level |
| Fails to crank | Defective start switch | Contact an Onan service center |
| Fails to crank | Defective starter or start solenoid | Contact an Onan service center |
| Cranks slowly or hard to pull recoil starter | Bad battery cable connection | Clean and tighten all battery cable connections |
| Cranks slowly or hard to pull recoil starter | Oil is too heavy | Change to proper weight oil |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing. Full Cummins/Onan El 40V troubleshooting guide (23 entries) →
Parts
5| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 122-0737 | Filter | 1 | Oil filter | Amazon eBay $11.99 NAPA $9.63 KuduParts $11.00 |
| 140-2672 | Air Cleaner Paper Element | 1 | Air filter | Amazon eBay $35.00 |
| 149-2356 | Filter, Fuel | 1 | Fuel filter | Amazon eBay |
| 167-0263-02 | Plug, Spark | 1 | Spark plug | Amazon eBay $15.68 NAPA $2.23 |
| 965-0166 | Air Filter Housing | 1 | Air filter | Amazon eBay |
Service, wear & replacement parts referenced for this model and its engine — confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.
Available documents
This page was generated from the 1 manufacturer document above by automated extraction; every figure shown is copied from one of them. How the data is compiled.