What are the symptoms of a bad boat carburetor?

Common signs include rough idling, stalling, hard starting, black smoke from the exhaust, fuel leaks and a loss of power or fuel economy. If the engine sputters or surges, the carburetor may need cleaning or rebuilding. A fuel leak or a raw-fuel smell is a fire risk: do not start the engine, ventilate the boat and have it checked.

Can a marine carburetor be rebuilt instead of replaced?

Yes. In many cases a rebuild brings a carburetor back to proper function without the cost of a replacement. A rebuild includes full disassembly and cleaning, new gaskets and needle and seat, float adjustment, jet inspection and adjustment to the maker's settings. If the body is corroded or the throttle shafts are badly worn, we tell you and quote a replacement instead.

How much does boat carburetor repair cost?

Labor is $150 an hour, plus parts (the rebuild kit) and a one-way trip fee by distance, from $30 in San Pedro to $110 in Newport Beach. A carburetor rebuild usually takes 2-4 hours; multi-carb or high-performance setups take longer. You get a written estimate before any work starts, and nothing is done without your OK.

How long does a marine carburetor rebuild take?

The rebuild itself usually takes 2-4 hours of labor. When your boat is ready depends on getting the right kit for your carburetor, and we tell you the expected timing with your written estimate.

Do you offer mobile carburetor repair service at the dock?

Yes. We diagnose, adjust and repair carburetors at your boat in San Pedro, Long Beach and our other harbors from Marina del Rey to Newport Beach. Each visit has a one-way trip fee by distance, from $30 in San Pedro to $110 in Newport Beach.

What brands of marine carburetors do you service?

We work on carburetors on MerCruiser/Quicksilver, OMC (Johnson/Evinrude) and older Yamaha two-stroke engines, as well as Holley Marine, Rochester (2GC and 4MV Quadrajet), Mercarb, Weber and Edelbrock marine carburetors.

Do you provide a warranty on carburetor repairs?

Yes. Our workmanship is warranted for 90 days from the invoice date; parts carry their manufacturer's warranty.

Can a faulty carburetor damage my marine engine?

Yes. A malfunctioning carburetor can cause a lean or rich fuel mixture, leading to overheating, misfires or engine damage over time. Fixing it early helps prevent more expensive engine repairs.

Carburetor Rebuild for Boats – Restore Fuel Efficiency

Carburetor Rebuild for Boats – Restore Fuel Efficiency (2)

Marine Carburetor Rebuild & Tuning

Rough idle? Stalling at the dock? Ethanol fuel leaves varnish in carburetor passages. We strip the carburetor down, clean every passage and rebuild it to the maker's settings for a smooth idle and clean acceleration.

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96% of 100

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$150 /hr

Labor estimate Usually 2–4 hours

Book sends us a ticket; nothing is charged online. Before any work you get a written estimate for labor, parts and the trip fee, and nothing is done without your OK.

Trip fee By distance, one way: $30 in San Pedro, $50 in Long Beach

San Pedro$30
Wilmington, Terminal Island$40
Long Beach: Shoreline, Rainbow Harbor$50
Long Beach Marina, Alamitos Bay$60
Redondo Beach$60
Seal Beach, Huntington Harbour$75
Marina del Rey$85
Newport Beach$110

Farther away: $25 plus $2.50 a mile, one way from our San Pedro shop. No trip fee when the boat comes to our shop, or for plan members. The work of a visit is at least $150; the trip fee is on top.

Registered in California: Breeze Marine Boat Service LLC, San Pedro
Where we work: At your slip from Marina del Rey to Newport Beach, or in our San Pedro shop
Questions first: (213) 693-0224 or submit a ticket

About this service

The Lost Art

Precision Tuning.
Smooth Idle.

Ethanol fuel is hard on older engines. As it sits, it leaves varnish in the jets and hardens gaskets, causing rough idling and stalling. For boat carburetor repair, we strip the carburetor down, clean every passage and rebuild it to the maker's settings.

Thorough Cleaning

Spraying cleaner down the throat isn't enough. We disassemble the carburetor and clean the body and its small internal passages of varnish and deposits.

Precision Tuning

A clean carb is useless if it isn't tuned. We set the float levels to the maker's specification, adjust the air/fuel mixture screws for a smooth idle, and adjust the choke for reliable cold starts.

Ethanol Defense

We rebuild using modern, ethanol-resistant gaskets, needle valves and accelerator pumps, made to stand up to E10 fuel.

The Rebuild Process.

A meticulous 4-step process.

Disassembly

We remove the carb and strip it down to the casting. We inspect the throttle shafts for wear (a common cause of vacuum leaks).

Cleaning

We clean the metal body and every passage, removing years of varnish and carbon buildup.

Reassembly

We reassemble with a marine rebuild kit: new gaskets, needle and seat, accelerator pump and, on Holley carburetors, the power valve. Jets and floats are replaced only if worn or damaged, and every screw is tightened to spec.

Sea Trial

We install the carb and perform a final "on-water" adjustment under load to check that it accelerates smoothly without hesitation.

Mechanical Art.

Restoring performance to classic engines.

A comparison showing the results of a professional boat carburetor rebuild service.

Disassembled marine carburetor parts being cleaned of varnish, salt and carbon buildup

Close-up of a technician measuring and adjusting the brass float drop setting on a rebuilt marine carburetor

Models We Service.

From 2-Barrels to 4-Barrels.

Rochester Quadrajet & 2-Jet

Mercarb / Weber Common on MerCruiser

Holley Performance Marine

Common Questions

Why is my boat stalling at idle?

This is usually a clogged "idle circuit." Tiny jets get blocked by varnish. No amount of adjustment will fix it; the physical blockage must be removed via cleaning.

Should I buy a "Reman" or rebuild mine?

We prefer rebuilding your original when it is in good shape. "Remanufactured" carbs are often mass-produced with generic settings that may not run as well on your specific engine.

Fix the Idle.

Schedule your carburetor service.

Rebuild My Carb

Our Marine Carburetor Rebuild Service, Step by Step

Boat carburetors live a hard life: fuel sits in the bowl for weeks, ethanol draws in moisture, and varnish slowly closes the tiny idle passages. A spray can will not reach those passages, which is why a proper boat carburetor rebuild starts with full disassembly and a thorough cleaning of every passage.

As marine carburetor rebuilders, we service units from 2-barrel to 4-barrel, including Rochester Quadrajet and 2-Jet, Mercarb and Weber carburetors common on MerCruiser engines, and Holley performance marine carburetors. Every marine carburetor rebuild uses ethanol-resistant gaskets and a new needle and seat, followed by an on-water adjustment under load. When you book our marine carburetor rebuild service, tell us the engine make, the carburetor model if you know it, and the symptoms: rough idle, stalling at the dock, hard cold starts or hesitation on acceleration.

Looking for a marine carburetor rebuild near me in Long Beach?

Most owners ask this when the engine idles rough, stalls at the dock or hesitates on acceleration. We remove the carb, strip it down, clean every passage and rebuild it with ethanol-resistant parts, then reinstall it and finish with an on-water adjustment under load.

When comparing carburetor shops, ask whether the carb is fully disassembled rather than spray-cleaned, whether the kit includes ethanol-resistant gaskets and needle valves, and whether it is tuned on the water after installation. Those steps decide whether an idle problem is really fixed.

Outboard carburetors get the same rebuild: full teardown, cleaning, new wear parts and adjustment on the water.