What's actually included when you book RV generator maintenance?
We service the maintenance items that keep an Onan or Cummins generator running clean and efficient. That means draining and replacing generator oil with the spec your manual calls for, swapping the oil filter (usually a Fram or OEM equivalent), replacing spark plugs, changing the fuel filter, doing a coolant flush if your unit is liquid-cooled, and servicing the air filter. We show up mobile - no trip to a dealer lot. Work takes 90 minutes to 2.5 hours depending on generator age and condition. We charge flat-rate, quoted by phone before we roll. Most customers spend $220 to $380 on a full annual service. If you just need an oil change and filter, that's $95 to $140.
A customer with a 2018 Jayco Jay Flight pulled into our Florida service area needing annual generator work before a month-long trip. Their Onan 5500 had 180 hours on it. We changed the oil, swapped the Fram filter, pulled and gapped new spark plugs, and replaced the fuel filter - all while they had lunch. Total time was 110 minutes. They left with a generator ready to run the AC and microwave without hesitation. That's the goal: routine maintenance that prevents mid-trip failures and extends component life.
Standard maintenance tasks:
- Oil drain and refill to factory spec
- Oil filter replacement
- Spark plug removal, gap, and reinstall
- Fuel filter swap
- Coolant flush (liquid-cooled units)
- Air filter inspection and service
- Battery connections cleaned and checked
- Load-test the generator after service
What problems show up most often in RV generators we service?
The most common issue is a generator that won't start or runs rough - usually caused by stale fuel, dirty fuel filters, or fouled spark plugs. Onan units especially accumulate fuel va
Generator starts but won't stay running smoothly
Visibly lower power output or slower AC cooling
How much does RV generator maintenance actually cost?
Pricing depends on what you need done, not on dealer shop rates or surprise fees. We quote flat-rate by phone before dispatch. A basic oil, filter, and spark plug service on an Onan 4000 or 5500 runs $220 to $280. A full an
Stale fuel, dirty filter, or carb gum. Maintenance fixes most rough-run problems.
Bad start battery, glow plug, or starter solenoid. Diagnose before you crank it dry.
How fast can you get to my RV for generator service?
In our core service areas - Central Florida and Southern Idaho - we aim for 2 to 4 hour response on emergency calls. If you need routine maintenance, we schedule around your calendar, usually within 2 to 5 business days. Outside core areas, we work through our nationwide partner network - typically 1 to 3 days. We're mobile-only, so we come to you. No waiting in a service lane. No dealership scheduling bottleneck. Call (888) 787-3727 and we quote by phone, then lock in a time window. If your generator dies mid-trip or won't start before you leave, we prioritize it. Most generator jobs finish in one visit.
A customer with a Keystone Cougar pulled into a Florida campground on Friday afternoon. Their Onan generator wouldn't turn over. They called us at 4:00 p.m. We arrived at 5:30 p.m., diagnosed a dead battery terminal and fouled spark plug, and had them running by 6:15 p.m. Total cost $185 including after-hours dispatch. That's the value of mobile service - no waiting for the shop to open Monday.
Response time expectations:
- Emergency (won't start/safety issue): 2 - 4 hours in core area
- Routine maintenance: 2 - 5 business days scheduled
- Nationwide partner network: 1 - 3 days outside core zones
- Mobile service (no dealer lot wait): Same-day in most cases
- After-hours call-out available: +$75 - $125 fee applies
Do you service both Onan and Cummins generators, or just one brand?
We maintain both Onan and Cummins units - they're the two brands in 95 percent of RVs. Onan generators are lighter-duty, air-cooled, and simpler mechanically - common on travel traile
What's the actual process when you show up to do generator work?
You call (888) 787-3727, we quote by phone, you approve, we dispatch and show up with parts. We inspect the generator visually first - check oil level, look for leaks, listen to how it runs. We ask how long since the last service and what you've noticed. Then we do the work: drain oil, replace filter, pull plugs, swap fuel filter, flush coolant if scheduled. After service, we start the unit and run it under load for 5 to 10 minutes to confirm everything works. We show you what we did, give you an invoice with 90-day warranty on workmanship, and you're done. No follow-up calls. No surprises.
A Tiffin motorhome owner in Ocala called Tuesday morning about maintenance. We quoted $365 for full service on their Cummins 5500. They approved. We arrived Wednesday at 10 a.m., worked through lunch, and finished at 12:45 p.m. Generator ran clean, no issues. They paid invoice, received a warranty card good for 90 days, and got tips on maintaining fuel stability over winter.
Service process flow:
- Phone call to (888) 787-3727 with RV year, make, generator model
- Flat-rate quote provided same call
- Customer approves and we schedule within 2 - 5 business days
- Mobile technician arrives with parts and tools
- Visual inspection and service execution
- Load test generator under full power
- Invoice and 90-day workmanship warranty issued
- You retain all parts removed (receipts included)