If your RV generator surges, won’t start, smells like raw gas, or stalls under load, the fix is usually in the carburetor and fuel system. We diagnose, clean, rebuild, and replace carburetors, fuel pumps, filters, and lines for most RV gensets the same day in , . Call for fast RV generator repair and a free estimate.
TL;DR
RV generator carburetor and fuel system repair in typically costs $189 to $750 depending on cleaning vs rebuild vs replacement. We handle mobile same-day service for Onan, Generac, and Honda-powered rigs. Call to book or request a free estimate.
We’re , a local owner-operated RV service that works all over Port St. Lucie, St. Lucie County, and the Treasure Coast. You’ll see us near Tradition, St. Lucie West, along US-1, and in campgrounds by the Savannas Preserve. Humidity here is brutal on carburetors. Ethanol fuel doesn’t help. We fix that.
RV generator repair in progress, carburetor removed for ultrasonic cleaning and re-jet.
Carb and fuel problems we fix fast on RV generators
Most no-start or surging issues trace back to varnish, clogged jets, sticking float needles, or weak fuel pumps. We see it daily. And yes, that “it ran last season” story is the most common one we hear. Florida heat cooks fuel. Ethanol separates. Then jets gum up. Simple.
Here’s our take. If the generator starts on choke then dies, that’s a lean condition. Usually a blocked main jet. If it starts, runs for 5 minutes, then quits under load, we check pump output and venting. On Onan MicroQuiet and QG units, a restricted fuel filter or cracked suction line is common. We carry both on the truck. Most fixes take 60 to 120 minutes on-site in .
Varnish and debris in the bowl, a textbook cause of surging and stalling under load.
Pricing: what RV generator carb and fuel repair really costs here
We don’t hide pricing. You deserve straight numbers before we turn a wrench.
- Diagnostic and fuel pressure test: $95 to $135 Ultrasonic carb clean with new bowl gasket and needle: $189 to $289 Carburetor rebuild kit installed: $260 to $420 New OEM carburetor (typical Onan KY/MicroQuiet): $350 to $750 parts + $120 to $220 labor Fuel pump replacement: $160 to $320 total depending on access Fuel filter, lines, and clamps refresh: $95 to $180
Parts vary by model and availability. We always price OEM vs quality aftermarket so you can pick. If you approve, we apply the diagnostic to the job. Fair and simple. Want a written estimate? Call and we’ll text it over.
Our RV generator repair process, step by step
We start with basics, because the basics fix most problems. Battery voltage. Oil level. Fault codes. Then we move to fuel.
1) Verify complaint under load. We plug a heat gun or AC to see failure in real time.
3) Carburetor assessment. If the float is sticking or the main jet’s clogged, we pull the carb.
4) Clean or rebuild. We use an ultrasonic tank, a can of Chem-Dip, and compressed air. No wire-poking jets. Big mistake.
5) Reinstall, set idle mixture where adjustable, and test at 50 percent then 100 percent load for 20 to 30 minutes.
6) Final checks. Vibration mounts, exhaust leaks, and CO test at the coach door.
On a good day, the whole thing takes about 90 minutes. If the bowl screws are seized or the carb is beyond saving, plan for 2 to 3 hours. We’ll tell you up front so you’re not guessing.
Brands and models we service every week
We handle Onan MicroQuiet, QG 4000, QG 5500, Marquis Gold, Generac Guardian RV models, and Honda-powered portable setups used as coach gens. If you’ve got an Onan QG with code 36 or 14 after cranking, we’ve fixed that a hundred times. If your Generac hunts at idle then clears under load, that’s a known carb issue.
We keep common Onan filters, plugs, pumps, and carb kits on the truck. We also stock SAE J30R7 and J30R9 fuel hose for mobile replacements. If it’s a rare carb, we’ll source it by engine code and serial. No guessing. According to Cummins Onan service literature, stale fuel is the number one cause of carb restrictions, and they recommend exercise runs 2 hours monthly at half load. We agree.
Why Port St. Lucie rigs have more carb problems than you’d think
Our humidity is off the charts in summer, storms roll in fast, and hurricane prep often means long storage stretches. Fuel sits. Ethanol attracts water. Then varnish forms. We see it especially in coaches parked near the Savannas Preserve and along the St. Lucie River where moisture lingers. Add heat from the generator compartment, and you’ve got a little chemistry set under your rig.
We recommend running the generator under load for at least an hour every month, especially May through October. Use marine-grade stabilizer when you can’t. And avoid gas from slow stations if you can help it. Fresh fuel matters.
Preventative maintenance that actually pays off
The best approach is simple and cheap compared to a new carb.
- Replace the fuel filter every 200 hours or annually. Costs $35 to $75 installed. Exercise the gen monthly for 60 to 120 minutes at 50 percent load. Use ethanol-free fuel if practical, or add a stabilizer rated for E10. Service air filter at 150 hours. A choked filter skews mixture. Keep the battery healthy. Low voltage causes fake fuel issues by tripping out the board.
We’ve had rigs come in from St. Lucie West where a 15 dollar filter was starving a $1,000 generator. Happens more than you’d think. Small stuff first.
Fuel pump output test with a graduated cylinder, checking ounces per minute at cranking and run.
Mobile service across the Treasure Coast, same day when possible
We’re a mobile A1 RV Repair emergency rv repair RV repair team. If you’re at Savannas Recreation Area, the Port St. Lucie RV Resort, or parked off Crosstown Parkway, we’ll come to you. We also cover Fort Pierce, Jensen Beach, Stuart, Palm City, and down I-95 within about 45 minutes of . St. Lucie County and Martin County, you’re in our daily loop. Stuck at a rest area or boat ramp? Call us. We handle emergency RV repair when your plans can’t wait.
Need other help while we’re there? We also do rv ac repair, rv furnace repair, rv refrigerator repair, rv water heater repair, rv electrical repair, rv solar repair, rv battery repair, rv plumbing repair, rv water leak repair, rv roof leak repair, rv slide out repair, rv leveling jack repair, and rv awning repair. If you searched rv repair near me or mobile rv repair and landed here, you’re in the right place.
Repair vs replace: our honest recommendation on carbs and pumps
We’ll try to save a carb once. If it’s been sitting two years, float bowl green, and the main jet’s cemented, we replace it. Not worth chasing ghosts. Honestly, we skip cheap no-name carbs. They run lean, they warp, they cause hunting. We prefer OEM Onan, or a known-good aftermarket like Ruix‑ing on some Honda clones, but only with verified jet sizing. For fuel pumps, we stick to spec’d pressure. High-pressure automotive pumps flood small engines. Wrong part.
Bottom line: if cleaning costs within $120 of a new OEM carb and your time matters, replace. Less come-backs. More camping.
Before and after carb cleaning. Left: varnish and scale. Right: clean passages and proper float level.
Safety matters: CO, fuel leaks, and codes we follow
We treat generator work like life safety. That’s not dramatic. It’s real. We always inspect exhaust routing and test carbon monoxide at the coach entry. NFPA 1192 (RV Standard) lays out requirements for fuel systems and ventilation, and we stick to those guidelines during service. We also follow Cummins Onan torque specs on manifold and carb fasteners to avoid air leaks that cause lean run.
Curious about fuel? The U.S. Department of Energy lists ethanol-blend impacts on small engines. Ethanol attracts moisture which leads to phase separation and corrosion. That’s why we push stabilizer and regular exercise runs.
For reference:
- Cummins Onan RV Generator Owner’s Manuals, mixture and exercise guidance NFPA 1192 Standard on Recreational Vehicles, fuel and exhaust safety U.S. DOE Alternative Fuels Data Center, ethanol fuel characteristics
Real-world fixes we did last week
- Tradition, PSL: 2016 Class C with Onan QG 4000. Would start, then die at 3 minutes. Fuel pump output weak at 6 oz/min. Spec is about 12. New pump and filter, 90 minutes, problem solved. Near US-1: Travel trailer using a Honda EU2200i as house power. Surged under load. Pilot jet clogged. Ultrasonic clean, new gasket, set eco-throttle off under AC load. Runs smooth. St. Lucie West: Fifth wheel with Generac, strong fuel smell. Float needle leaking. Rebuilt carb, replaced cracked line, added fire sleeve by the muffler. No more flooding.
You don’t need fancy. You need correct. We keep it that way.
FAQs: RV generator carburetor and fuel system repair in Port St. Lucie
How much does RV generator carburetor cleaning cost in Port St. Lucie?
Carb cleaning with ultrasonic service typically runs $189 to $289 in , parts and labor included. If the carb needs a full rebuild kit, plan for $260 to $420. When the carb body is too corroded to save, a new OEM carb is $350 to $750 plus $120 to $220 labor.
Can you do same day rv generator repair at my campsite?
Yes. We offer same day rv repair across St. Lucie County and much of the Treasure Coast. If you’re near Tradition, St. Lucie West, or the Savannas, we can usually get to you in 2 to 6 hours. Call and we’ll give you the next available window.
Why does my RV generator surge up and down?
Surging points to a lean condition. Common causes are a clogged main jet, air leaks at the carb gasket, or a restricted fuel filter. On Onan MicroQuiet units, stale fuel varnish is the usual culprit. We clean the carb, replace the filter, and re-test under 50 to 100 percent load.
Should I replace the fuel pump when I replace the carburetor?
If the pump fails flow or pressure tests, yes. We measure output in ounces per minute and compare to spec. Weak pumps starve the engine and can fry control boards from repeated restarts. If the numbers are good, keep it. We don’t replace good parts.
How often should I run my RV generator to prevent carb issues?
Run it monthly for 60 to 120 minutes at about half load. Cummins Onan guidance matches this exercise routine, and it keeps fuel fresh through the jets. In humidity, we also suggest stabilizer and replacing the fuel filter yearly.
Is ethanol-free gas worth it for RV generators?
If you can get it, yes. Ethanol attracts water and creates varnish during storage. Ethanol-free fuel reduces gumming and helps with hot restarts. If you can’t source it, use a marine-grade stabilizer designed for E10 and avoid long storage with a half-full tank.
Do you service rv ac repair and other systems while you’re here?
We do. While we’re set up for rv generator repair, we can also handle rv ac repair, rv refrigerator repair, rv water heater repair, and rv electrical repair. Tell us what’s acting up when you call so we bring the right parts.
What brands of RV generators do you work on?
Onan/Cummins, Generac, and most Honda-based portables used as coach power. We stock common Onan parts and can order by serial number for oddball units. We follow manufacturer procedures for mixture, governor settings, and torque values.
Can you fix a fuel leak today?
If it’s a line, clamp, or bowl gasket issue, yes. We carry J30R7 and J30R9 hose, clamps, filters, and gaskets. If a tank fitting is cracked or a hard line is rusted, we’ll stabilize it and schedule a return with parts. Safety first with any fuel drip.
What makes our rv generator repair different
We don’t sell you parts you don’t need. We test, show you the numbers, and fix the root cause. You’ll see your old filter, your varnished jet, and the exact fuel output we measured in a little beaker. Clear proof. And we back carb and fuel work with a 12-month workmanship warranty. Licensed and insured. No surprises.
If you prefer OEM-only, say the word. If you want a budget option that still meets spec, we’ll offer it. We’ll also tell you if a low-cost part is a bad idea. We’re not fans of off-brand pumps that overpressure and flood small engines. Saves you money today, costs you more next month.
Serving with mobile, emergency, and same day help
You’ll spot our truck along I-95, the Crosstown Parkway, and US-1. We cover Port St. Lucie, Fort Pierce, Jensen Beach, Stuart, Palm City, Tradition, and St. Lucie West. Typical drive times run 20 to 45 minutes from . If you need emergency rv repair on a travel day, tell us. We’ll reshuffle to keep you rolling.
For campsite managers and property offices, we can set up service days for multiple rigs. Helpful before summer when the heat kicks up and AC loads stress older gensets.
Ready to book? Here’s how we make it easy
Call for fast scheduling and a free estimate. Or send a message through our contact form with your generator model and a video of the issue. We’ll reply with a price range and earliest arrival window. If you’d like, we can bundle a quick rv appliance repair check while we’re on-site.
- Request a free estimate at . Ask for same day rv repair if you’re traveling. Mention code lights or symptoms you’ve seen. Helps us stock the truck.
You can also explore related services like rv generator repair, rv ac repair, and rv roof repair on our site. Our service area page lists the neighborhoods and parks we visit every week.
A quick word on codes, manuals, and doing it right
We base repairs on named sources and field experience. Cummins Onan service manuals drive our carb and governor settings. NFPA 1192 informs safe routing and fuel system practices. The U.S. Department of Energy’s guidance on ethanol supports our fuel stabilizer recommendations. If you ever want to see the pages we’re using, ask us on-site and we’ll show you.
External references for your research:
- Cummins Onan official RV generator manuals and service bulletins NFPA 1192 Standard on Recreational Vehicles, fuel and exhaust safety guidance
Mid-page quick contact
Got a trip this weekend? Don’t wait. Call and ask for mobile rv generator repair in . We’ll give you a real price and an arrival window. Free estimate. No drama.
Last updated: March 2026
Service truck staged near Tradition in PSL, stocked with filters, pumps, gaskets, and diagnostic tools.
What to try before we arrive, if you’re handy
If you want to attempt a quick save, here’s a simple checklist. It won’t cure a cemented jet, but it can separate electrical from fuel issues.
- Verify battery voltage above 12.4V at the generator while cranking. Replace the fuel filter if it’s older than a year. Direction matters. Drain the carb bowl if there’s a drain screw. Catch and inspect fuel for water. Run with a fresh gas source if possible. Short hose to a known-good can. Try a 50 percent load run for 20 minutes after any change.
If any of that feels like too much, no problem. We’ll handle it. Some coaches are tight on access. We’ve got mirror cameras, right-angle drivers, and the busted knuckles to match.
Call-to-action: book your rv generator repair now
We’re , your local RV generator pros in , . We handle carburetor cleaning, rebuilds, fuel pumps, filters, and lines on-site. Same day in many cases. Licensed and insured, with a 12-month workmanship warranty.
- Call for scheduling and a free estimate. Ask about emergency rv repair if you’re on the road. We also service rv ac repair, rv refrigerator repair, and rv roof leak repair.
If you searched motorhome repair near me, camper repair near me, or rv service near me, we’ve got you. We’ll get your power back so your trip isn’t ruined.
Internal links you might need:
- RV generator repair service overview at /rv-generator-repair AC service details at /rv-ac-repair Service area and neighborhoods at /service-areas/port-st-lucie
External references by name:
- Cummins Onan RV Generator Manuals at the official Cummins site NFPA 1192 Standard on Recreational Vehicles at NFPA U.S. Department of Energy, Alternative Fuels Data Center on ethanol blends
P.S. Want us to bring CO detectors or fuel stabilizer? Say the word when you call . We’ll add it to the truck.
Load test complete at St. Lucie West. Quiet, steady power at full AC load. Ready to roll.
A1 RV Repair
RV repair shop
1961 SW South Macedo Blvd #303, Port St. Lucie, FL 34984
Open now
Monday - Sunday
7 AM–8 PM
Veteran-owned
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RV Repair Port St. Lucie FAQ's.
What kind of mobile RV repair services do you offer in Port St. Lucie?.
–We provide full mobile RV repair services that come straight to your location—whether you’re parked at home, in a campground, or stuck on the side of the road. From AC failures to slide-out issues, our skilled team handles everything on-site so you can avoid the headache of moving your RV.
Do you work on motorhomes, or just trailers?
- We work on both! Whether you’ve got a Class A motorhome, a fifth-wheel trailer, or a travel trailer, we’re equipped to handle the job. Our rv technicians know the ins and outs of every style of rig, and we bring the tools and parts and accessories right to you.
What’s included in your maintenance service?
- Our maintenance service covers the basics and beyond: roof resealing, battery testing, water heater inspections, diagnostics, plumbing checkups—you name it. Regular checkups help rv owners catch small issues before they turn into big, costly ones.
What areas do you specialize in when it comes to repairs?
– We specialize in non-engine RV repairs, meaning we’re your go-to for electrical, plumbing, appliances, HVAC, slide-outs, and interior and exterior improvements. Think of us as your all-in-one pit crew for everything but the engine.
Can you deliver replacement parts if I already know what’s wrong?
– Absolutely! If you know your water pump’s toast or your fridge’s circuit board is fried, we can deliver the part, install it, and make sure it’s working perfectly. We work with trusted suppliers to get the right rv parts quickly. Just keep in mind, YOU requested that part and/or service, if that’s not the problem, don’t hold us accountable.
What does your repair process typically look like?
– Our repair process starts with a quick chat to understand your service needs. Once we’re on-site, we run full diagnostics, walk you through what’s going on, and then make the necessary fixes right then and there. It’s all done without the hassle of a service center visit.