Boat Fuel System Repair
Water in the fuel, clogged injectors, bad fuel pumps, or an engine that loses RPM? We find the restriction and fix the fuel system at your dock.
Ethan, the owner and mechanic, answers the phone · Open 7 days a week
- Same / next day availability
- On-site & marina service
Boat Fuel System Repair at Your Dock
Most of the running problems we see start with fuel. Water, old fuel, and clogged filters starve the engine, and the symptoms look like a lot of other problems. We test the fuel system step by step and fix the cause, not just the symptom.
Trusted by boat owners across South Florida
Read our Google reviewsNo call center. No front desk.
When You Call, the Owner Picks Up
Every call goes straight to Ethan, the owner of EG Marine Services and the mechanic who does the work. There’s no receptionist taking a message and no waiting on a callback from someone who’s never seen your boat.
Tell him what’s going on: the alarm on the display, the noise at idle, the engine that won’t turn over. Ethan knows Yamaha, Suzuki, Mercury, and the rest of what runs in South Florida inside and out, so you’ll usually get a straight answer on the first call, whether that’s something you can check yourself or a visit to your dock.
- Straight answers, not a script
- Diagnostic questions answered on the phone
- Honest advice, even when the fix is simple
- The person you talk to is the one who shows up
Ethan
Marine mechanic
Describe what the boat is doing and get a real answer from the mechanic, not a message taker.
Call Ethan: 786-351-5363Open 7 days a week
Fuel problem? Call Ethan and tell him the symptoms. Water and clogged filters are common.
Call 786-351-5363Signs of a Boat Fuel System Problem
- Engine starts and then dies
- Loss of power or RPM at higher speeds
- Rough idle or stalling
- Water in the fuel/water separator bowl
- Engine bogs when you throttle up
- Hard starting after the boat sits
Real Fuel System Jobs
Water in the fuel
"Always check your fuel. You don't want to get stuck offshore." Water in the fuel is one of the most common problems Ethan finds.
Clogged fuel injectors
A Yamaha 150 running rough and a Suzuki 90 losing RPM were both traced to clogged injectors and high-pressure filters. Both ran like new afterward.
VST filters
A Suzuki 115 had a lack of power, fixed with a VST service. We also do VST filters on triple Yamaha 300s.
Shutting down at high RPM
A Suzuki 300 shut down at higher RPM. The cause was a clogged fuel pickup.
Fuel pump on the water
A failed fuel pump was replaced on the water right before New Year's.
Our Fuel System Repair Process
- 01
Check the Fuel
We look at the separator bowl and take a fuel sample.
- 02
Test Pressure and Flow
We test fuel pressure and look for restrictions from the tank to the injectors.
- 03
Clean or Replace
Filters, separators, VST filters, pumps, and injectors are cleaned or replaced as needed.
- 04
Run and Verify
We run the engine and confirm it holds RPM under load.
From the Job Log
Clogged fuel pump pickup sock pulled from a boat engine 
Contaminated boat fuel sample in a clear container 
Rusted Sierra fuel water separator filter due for replacement 
New twin fuel water separator filters installed in a boat's engine bay
Fix Your Fuel Problem
Fuel problems are behind many no-starts, stalls, and power loss. Call and we'll track it down.
Call Ethan directly786-351-5363Open 7 days a week · No call center or front desk, you talk to the person doing the work
- Water-in-fuel cleanup
- Injector cleaning and testing
- Fuel pump and VST service
- Separator and filter replacement
Prefer a free quote?
Leave your number and we’ll call you back.
Boat Fuel System Repair FAQs
How does water get in boat fuel?
Condensation in a partly empty tank, a bad fuel fill or vent, or contaminated fuel from the dock. Keeping the tank full when the boat sits and changing your fuel/water separator regularly helps prevent it.
How often should I change my fuel/water separator?
Check it every 50 hours and replace it at least once a year or every 100 hours. Change it right away if you see water in the bowl.
Why does my outboard lose power at high RPM?
A fuel restriction is the most common cause: a clogged filter, a dirty VST filter, weak injectors, a failing fuel pump, or a clogged pickup tube. We've found clogged pickup tubes even on brand-new boats.
Can a boat that sat for years be brought back?
Often, yes. We have cleaned injectors, fuel pumps, plugs, cap and rotor on an engine that had sat for 13 years and got it running again.
Areas We Serve
Our mobile marine mechanics travel to marinas, private docks, and waterfront homes from Boca Raton to Islamorada. Nearby but not listed? Reach out to confirm availability in your area.