What inboard engines do you work on?

We service marine gas inboards from MerCruiser, Volvo Penta, Crusader, PCM, Indmar, and Marine Power, plus diesels from Yanmar, Cummins, Volvo Penta, and Caterpillar. For outboard-powered boats, see our outboard engine repair service.

How often should I service my inboard engine in Miami?

At minimum once a year or every 100 hours, whichever comes first. Miami's warm water and salt air accelerate wear on cooling systems, impellers, and manifolds, so we often recommend more frequent raw water service. See our 100-hour boat service for the full scheduled maintenance checklist.

What is the difference between an inboard and a sterndrive?

An inboard puts the engine inside the hull and drives a prop shaft straight out the bottom. A sterndrive (also called an I/O or inboard/outboard) has the engine inside the hull but transmits power through an outdrive unit on the transom, similar to an outboard's lower unit. Sterndrives need both engine service and drive service to stay reliable.

Do you offer mobile inboard engine repair?

Yes. Our mobile marine mechanics handle most inboard diagnostics and repairs right at your dock, marina, or storage yard. For major work like manifold replacement or a full rebuild, we coordinate haul-out at a partner yard. Call (305) 290-2701 to schedule.

Inboard & Sterndrive Boat Engine Repair Miami

Inboard & Sterndrive Boat Engine Repair in Miami

Name: Boat Repair Miami
Address: Miami, FL, US
Telephone: (305) 290-2701

Expert inboard gas, diesel, and sterndrive engine service for Miami cruisers, sportfishers, and express yachts

Request Service Call (305) 290-2701

Inboard-powered boats ask more of their engines than anything else on the water. Cooling systems run harder in Biscayne Bay's warm, salt-heavy water, heat exchangers scale up, and rubber seals bake in the Florida sun. Boat Repair Miami specializes in inboard, sterndrive, and marine diesel repair for the cruisers, sportfishers, and express yachts that call South Florida home. For boats powered by outboards, see our outboard engine repair service instead.

Inboard Gas Engine Repair

Inboard gas engines power a huge portion of Miami's cruiser, sportfisher, and houseboat fleet. We service the full range of marine gas inboards from the brands you actually see on South Florida docks: MerCruiser, Volvo Penta, Crusader, PCM, Indmar, and Marine Power.

Common gas inboard jobs we handle:

Full tune-ups (plugs, cap, rotor, wires, fuel filter, impeller)
Raw water pump and impeller replacement
Heat exchanger service and tank flushing
Riser and manifold replacement (saltwater kills these in 4-7 years)
Starter, alternator, and ignition diagnostics
Fuel system cleaning and injector service
Compression testing and top-end inspections
Full rebuilds and repowers

Marine Diesel Engine Repair

Marine diesels live long lives when they are serviced properly. We work on Yanmar, Cummins, Volvo Penta diesels, Caterpillar small marine engines, and Mercruiser diesel inboards. Biscayne Bay's silt and heat are hard on diesel cooling circuits, and most diesel failures we see start as small cooling or fuel issues that went unaddressed.

Our diesel services cover:

Annual service: oil, oil filter, fuel filter, secondary fuel filter, air filter, impeller
Injector testing and cleaning
Turbocharger inspection and rebuild
Heat exchanger cleaning and pressure testing
Raw water system service (hoses, pumps, strainers, seacocks)
Valve adjustments and top-end work
Alarm code diagnostics for modern electronic diesels

Sterndrive and I/O System Service

Sterndrive boats combine an inboard engine with an outdrive unit, which means they carry the service needs of both worlds. We work on MerCruiser Alpha and Bravo drives and Volvo Penta SX and DP drives, handling the gimbal bearings, shift cables, bellows, U-joints, and gear lubes that keep the outdrive working. Most sterndrive problems we see in Miami trace back to neglected bellows or failed drive gear oil.

Typical sterndrive services:

Annual drive service: gear lube, bellows inspection, gimbal bearing grease
Bellows replacement (U-joint, shift, and exhaust)
Trim ram, pump, and limit switch diagnostics
Shift cable adjustment and replacement
Drive removal and reseal
Anode replacement (zincs, aluminum, or magnesium depending on water)

Common Inboard Problems We Fix

Engine overheating or alarm codes tripping
Loss of power under load
Rough idle, stalling, or hard starting
White, black, or blue smoke from the exhaust
Salt water in the bilge or raw water leaks
Steering or shifting issues on sterndrives
Battery drain or charging faults

Miami-Specific Engine Issues

Miami's marine environment puts unique stress on inboard powerplants. Warm water reduces cooling capacity, which makes proper impeller and heat exchanger service critical. Ethanol fuel can phase-separate in tanks that sit for weeks, leading to rough running and injector damage. Salt air corrodes electrical connections and grounds faster than anywhere in the country. Our technicians see these problems daily and know how to address them before they sideline your boat.

Mobile Inboard Engine Service

Most inboard service and diagnostics can be performed at your dock. Our mobile units arrive with engine diagnostic equipment, common parts for MerCruiser and Volvo Penta systems, and the tools needed for in-water service. For larger jobs like repowers or major overhauls, we coordinate haul-out and yard work at partner facilities in Miami and Fort Lauderdale. Learn more about our mobile marine mechanic service.

Ready to schedule inboard engine service? Contact Boat Repair Miami at (305) 290-2701 or request service online.

Know the Signs

Signs Your Inboard Engine Needs Service

Engine overheating or temperature alarm tripping

Loss of power under load or at cruise RPM

Rough idle, stalling, or hard starting

White, black, or blue exhaust smoke

Salt water in the bilge or visible raw water leak

Rising oil consumption or oil in the bilge

Unusual knocking, rattling, or vibration

Shifting or steering issues on sterndrives

Our Process

Our Inboard Engine Repair Process

On-Board Diagnostic

Our mechanic arrives at your dock with scan tools for MerCruiser, Volvo Penta, Yanmar, and Cummins systems plus compression gauges, manometers, and infrared thermometers.

Written Estimate

We explain exactly what failed, what needs replacing, and what it will cost before any work starts. Free on-site estimates, no obligation.

Repair at Your Slip

Most inboard repairs happen in-water. For larger jobs we coordinate haul-out at a partner yard in Miami or Fort Lauderdale.

Sea Trial & Verification

Every repair is verified with either a dockside test or a sea trial so you know the engine is right before we leave.

Miami Inboard Engine Experts

Why Miami Inboards Need Specialized Care

Inboard-powered boats work harder in Miami than almost anywhere else. Warm Biscayne Bay water reduces cooling efficiency, salt air attacks electrical grounds, and tropical humidity condenses inside engine rooms every time the boat sits. Our team focuses on marine gas and diesel inboards for the cruisers, sportfishers, and express yachts docked across Coconut Grove, Miami Beach, Key Biscayne, and Haulover. We know which raw water pumps fail first, which heat exchangers need flushing every 2 years, and which MerCruiser manifolds are due for replacement on Miami-based boats.