#1 Mobile Marine Mechanic Florida

Licensed & insured mobile marine mechanic serving St. Augustine, Jacksonville, St. Johns & surrounding areas. Outboard, Inboard, Electrical & Maintenance. Call 904-916-4604

 Service Area

We proudly serve boat owners in the following locations:

  • St. Augustine, FL
  • Jacksonville, FL
  • St. Johns, FL
  • Ponte Vedra Beach, FL
  • Palm Coast, FL
  • Green Cove Springs, FL
  • Palatka, FL
  • Orange Park, FL
  • Fernandina Beach, FL
  • Mayport, FL

We also service vessels located on the Intracoastal Waterway (ICW), St. Johns River, Matanzas River, Tolomato River, and at local marinas, private docks, boat ramps, and dry storage facilities.

Our fully mobile marine mechanic team eliminates the need for towing or transport. Whether your boat is in the water or on land, Neptune Marine Service delivers expert repairs and diagnostics wherever your vessel is located.

📍 Based in St. Augustine, FL – Serving Northeast Florida & nearby coastal Georgia

Solving Common Boating Problems in Northeast Florida

Boat owners in St. Augustine, Jacksonville, St. Johns, and surrounding coastal areas face unique challenges due to saltwater, heat, humidity, and heavy seasonal use. Neptune Marine Service specializes in solving these exact issues:

Engines That Won’t Start or Run Right

Common Causes:

  • Corroded electrical connections
  • Weak batteries or charging system failures
  • Fuel system contamination or clogged filters
  • Sensor faults triggering alarms or limp mode

How We Help:

  • ✔ Mobile diagnostics
  • ✔ Electrical testing & repair
  • ✔ Fuel system inspections
  • ✔ On-site troubleshooting (no towing required)

Warning Alarms, Beeping & Limp Mode

Common in Florida waters due to:

  • Overheating issues
  • Oil system or sensor failures
  • Salt buildup affecting sensors
  • Long periods of inactivity

How We Help:

  • ✔ Alarm code diagnosis
  • ✔ Cooling system inspection
  • ✔ Sensor replacement & verification
  • ✔ Reset and test on-site

Saltwater Corrosion & Electrical Failures

Frequent in ICW & coastal marinas:

  • Corroded wiring and connectors
  • Failed trim/tilt systems
  • Grounding issues
  • Accessory power loss

How We Help:

  • ✔ Electrical system repairs
  • ✔ Corrosion prevention solutions
  • ✔ Proper marine-grade wiring
  • ✔ Battery & charging system service

Overheating & Cooling System Problems

Caused by:

  • Clogged water intakes
  • Failing water pumps or impellers
  • Thermostat issues
  • Debris from shallow waterways

How We Help:

  • ✔ Cooling system inspections
  • ✔ Impeller & thermostat replacement
  • ✔ Water flow testing
  • ✔ Overheat alarm resolution

Why Choose Neptune Marine Service?

We are based in St. Augustine, not a call-center service or out-of-area shop. We work on boats in Jacksonville marinas, St. Augustine docks, ICW and riverfront properties, and dry storage and private lifts.

We understand local tides, shallow waterways, heavy salt exposure, and seasonal boating patterns, which allows us to diagnose problems faster and fix them correctly.

🚤 Fully Mobile – We Come to You

Most shops require towing, trailering, or long wait times.

We don’t.

  • ✔ No towing fees
  • ✔ No scheduling weeks out
  • ✔ No hauling your boat off the water

We service boats where they are, saving you time, money, and frustration.

⚙️ Specialized in Real-World Florida Boat Problems

Many mechanics follow a checklist. We focus on what actually fails in Northeast Florida, including:

  • Salt-damaged electrical systems
  • Repeated alarm & limp-mode issues
  • Overheating from debris-heavy waterways
  • Fuel problems from ethanol and heat
  • Boats that sit for weeks or months

This means fewer repeat issues and more reliable repairs.

🔍 Diagnosis First, Not Guesswork

Too many boat owners get parts replaced that don’t fix the problem.

At Neptune Marine Service:

  • ✔ We diagnose before replacing
  • ✔ We explain the issue clearly
  • ✔ We give honest repair recommendations
  • ✔ We avoid unnecessary upsells

You get solutions, not experiments.

⏱️ Faster Response for Local Boaters

Because we serve an 80-mile radius from St. Augustine, we can respond faster than regional shops that cover the entire state.

Local boaters benefit from:

  • Faster scheduling
  • Priority for nearby waterways
  • Flexible on-site service