Marine Diesel Overhaul

in the Florida Keys

Marine Engine Rebuilding

Top-End Overhaul

Lower-End Overhaul

Piston & Liner Replacement


Complete Marine Diesel Services for Repair, Maintenance, & Performance in the Florida Keys

Engine Testing 

Precision Machining

Piston & Liner Replacement

Engine Disassembly & Reassembly

Expert Marine Diesel Engine Rebuilding Services

Complete Marine Engine Rebuilding

When your boat engine issues go beyond routine fixes, it may be time to consider a deeper level of service. Florida Keys Marine Diesel LLC provides expert marine diesel rebuilding for boaters throughout the Florida Keys. Our goal is to help vessel owners make informed decisions by providing advanced diagnostics and laying out all of the options to keep the vessel on the water. If it is time for boat engine rebuilding in Florida, trust us to get it done correctly. To learn more, or to request a quote for the cost of a marine diesel engine overhaul, don’t hesitate to call our helpful crew.

A sleek, white motor yacht cruising across blue water on a sunny day with green marshland in the background.

Is it Time for a Marine Diesel Engine Overhaul?

Engines often give warning signs before major failure occurs, and recognizing those signs early can save time and money. If your vessel is experiencing persistent power loss, excessive smoke, hard starting, increased oil consumption, knocking sounds, or overheating despite recent repairs, it may indicate internal wear. When diagnostics reveal declining compression or internal component wear, a marine engine rebuild may be the most effective path forward. Trust us to help you find the right solution for your vessel.

Marine Diesel Engine Rebuilding

When the evidence says it’s time for a rebuild, we’ll do it right. We offer top-end overhaul services to address cylinder head components, valves, and related systems, as well as lower-end overhaul work that focuses on crankshafts, bearings, and rotating assemblies. For engines with extensive wear or damage, the techs at Florida Keys Marine Diesel can perform complete rebuilds that involve full engine disassembly and reassembly to restore factory-level performance.

Piston & Liner Replacement

Worn pistons and cylinder liners are common causes of reduced engine performance and efficiency, especially in high-hour marine diesel engines. Our piston and liner replacement services address issues such as loss of compression, excessive blow-by, and oil consumption that can impact overall engine health. This process is a critical part of many marine engine rebuilding projects and plays a major role in extending engine life.

Several white and teal sport fishing boats are docked at a marina on a sunny day.
Several white yachts float on calm, sunlit ocean waters during a golden sunset.

Engine Testing

Engines often give warning signs before major failure occurs, and recognizing those signs early can save time and money. If your vessel is experiencing persistent power loss, excessive smoke, hard starting, increased oil consumption, knocking sounds, or overheating despite recent repairs, it may indicate internal wear. When diagnostics reveal declining compression or internal component wear, a marine engine rebuild may be the most effective path forward. Trust us to help you find the right solution for your vessel.

Serving the Florida Keys & Surrounding Areas


Key Largo Islamorada Marathon Key West MiamI

Precision Machining

In many cases, successful marine diesel repair and rebuilding depends on the condition of internal components, which is why we provide precision machining as needed. From resurfacing cylinder heads to machining critical engine parts for proper fit and function, this process ensures all components meet exact specifications. Our marine machining services allow us to restore worn parts when possible and support the overall integrity of the rebuild, helping deliver consistent performance and durability.

Several white boats are docked in a marina under a bright blue sky with scattered clouds.

Request a Quote for Marine Diesel Engine Overhaul in the Florida Keys Today

For boaters across the Florida Keys, Florida Keys Marine Diesel LLC delivers dependable solutions when engines require more than basic service. From identifying early signs of failure to complete marine engine rebuilding in the Florida Keys, our team will keep your vessel safely on the water. To learn more, or to request a quote for diesel marine engine rebuilding in Miami, Key Largo, or throughout the Keys, please don’t hesitate to call 786-475-8533. We look forward to assisting you.