Boat Battery & Charging Repair
Dead batteries, a motor that won't crank, or batteries that won't charge? We fix starters, alternators, stators, chargers, and the wiring between them.
Ethan, the owner and mechanic, answers the phone · Open 7 days a week
- Same / next day availability
- On-site & marina service
Boat Battery and Charging Repair at Your Dock
A boat that won't start or keeps killing its batteries is one of the most common calls we get. The cause can be the battery itself, the charging system on the engine, the charger, or the wiring in between. We test the whole system so you don't replace parts you didn't need.
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
Batteries won’t hold a charge? Call Ethan and talk through your setup.
Call 786-351-5363Signs Your Boat Battery or Charging System Is Failing
- Engine clicks but won't crank
- Batteries are dead after the boat sits
- Voltage drops while the engine is running
- Battery warning on the gauge
- Electronics shut off or reset
- One engine starts and the other doesn't
Real Battery, Starter, and Charging Jobs
Stator and regulator at 4,200 hours
A Yamaha 300 with 4,200 hours had a bad stator, plus a worn belt and rusted pulleys. It was back running great after the repair.
Bad starters
Starters replaced on outboards, a Mercury 300 V8, and inboard boats. We bench test starters to confirm before we replace them.
Seized alternator
A seized alternator kept breaking belts. Replacing it stopped the problem.
Battery isolator
A Verado that wasn't charging had a bad isolator, which was also killing the battery.
Loose cable, no start
One engine wouldn't start. The fix was a loose cable, not a new part.
Our Boat Battery Repair Process
- 01
Test the Batteries
Load test each battery and check the cables and connections.
- 02
Test Charging Output
We check output from the alternator or stator, the regulator, and the isolator with the engine running.
- 03
Trace the Wiring
Switches, fuses, harnesses, and connections are checked for corrosion and voltage drop.
- 04
Repair and Verify
We replace what failed and confirm the system charges and starts properly.
From the Job Log
Old and new boat engine starters side by side 
Marine starter motor being bench tested with jumper cables 
New outboard starter motor ready to install 
New boat batteries and charger installed inside a center console
Fix Your Starting or Charging Problem
Call with your symptoms. Many starting and charging problems can be fixed in one visit.
Call Ethan directly786-351-5363Open 7 days a week · No call center or front desk, you talk to the person doing the work
- Battery and charger testing
- Starter and alternator replacement
- Stator and regulator repair
- Harness and cable repair
Prefer a free quote?
Leave your number and we’ll call you back.
Boat Battery & Charging Repair FAQs
Why does my boat battery keep dying?
Common causes are a failing battery, an engine that is not charging (bad alternator, stator, or regulator), a bad battery isolator, or something drawing power while the boat sits. We test each one.
My boat just clicks and won't crank. What is it?
Usually a weak battery, corroded or loose cables, a bad starter solenoid, or a failing starter. We have also traced no-crank problems to a single loose cable.
Do you install battery chargers?
Yes. We install onboard chargers like Victron and ProMariner and wire them correctly to your battery banks.
Can you replace a starter at my dock?
In most cases, yes. We replace starters on outboards and inboards on site.
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.