Onan 4000 Reliability Repair Kit
For compatible Onan 4000 gasoline RV generators experiencing starting problems, fuel delivery issues, surging or repeated shutdowns. We diagnose at your RV and install the right fuel-system repairs.
Call About Your Onan 4000Usually scheduled the same week — repairs are done during the visit Text a photo — we'll tell you what's wrong
You'll talk to Joe — the owner and the tech who actually shows up.
Mobile diagnostic and repair visits start at $475. Kit parts are quoted after diagnosis.
- 1Describe the symptom
Tell Joe what the generator is doing and which Onan you have.
- 2Get a ballpark
We'll explain the likely cause and what a visit costs — no pressure.
- 3We come to you
Driveway, campsite, or storage lot anywhere around Tampa Bay.
Common Onan 4000 symptoms
- Cranks but won't start
- Starts, then dies after a few seconds
- Surging or hunting under load
- Repeated shutdowns or Code 36
- Problems after the RV has been in storage
Compatible applications
Onan 4000 (Microquiet-style) gasoline RV generators in motorhomes and toy haulers. We confirm your exact model and spec number before recommending parts.
What the repair package may include
- Carburetor replacement when needed
- Fuel pump replacement when needed
- Related fuel-system components (lines, filter, connections)
- Operational and load testing
This is an installed repair package performed by our technician — not a parts kit for self-installation. The technician recommends repairs after diagnosis; not every generator needs every component.
Why professional installation
- Restore dependable generator operation
- Address common gasoline fuel-system failure points
- Reduce the likelihood of repeat problems associated with the repaired components
- Professional diagnosis and installation at your RV
- Clear repair recommendations before any additional work
A reliability kit addresses fuel-system failure points. It does not prevent every future breakdown or fix unrelated electrical, ignition, or mechanical problems.
Pricing
- $475 mobile diagnostic/repair visit minimum — travel within our standard Tampa Bay service area and up to one hour of on-site labor.
- Additional labor: $265/hour, billed in 30-minute increments.
- Repair parts: quoted based on generator model and diagnosis.
- Return trip: $125, when applicable.
- You approve the repair estimate before any additional work.
- ✓Mobile dispatch to your RV
- ✓Travel within our standard Tampa Bay service area
- ✓Up to the first hour of on-site diagnostic and/or repair labor
- ✓On-site troubleshooting and generator testing
- ✓Repair recommendations if additional work is required
Additional parts or labor are quoted for approval before proceeding. Additional labor $265/hour, billed in 30-minute increments when applicable. Return travel when required for the same repair: $125. A 3.5% credit-card processing fee and applicable taxes may apply.
Tell us what your generator is doing and we'll explain the next step.
Text a photo — we'll tell you what's wrongYou'll talk to Joe — the owner and the tech who actually shows up.
Get your Onan 4000 running reliably again
We come directly to your RV anywhere within about 50 miles of Tampa.
Call (813) 245-1931Usually scheduled the same week — repairs are done during the visitNo Worries RV is an independent mobile generator service — not an authorized Cummins dealer. Other generator repairs