South Florida · Marine diesel service
Independent marine diesel service specializing in Caterpillar engines. From a difficult diagnosis to a major overhaul, get a clear understanding of what your engine needs.
Call (786) 390-4960 ↗DIAGNOSTICS / MAINTENANCE / OVERHAULS
Key West to West Palm Beach · Worldwide travel available
01 / What we do
Focused engine support for yacht owners, captains, and marine service professionals.
Electronic and mechanical troubleshooting for engine faults, performance concerns, and cooling-system problems. ECM fault-code reading, lifetime status reports, and operating histograms where supported by the engine ECM.
Detailed engine inspections and documented findings to help buyers make informed decisions. Available ECM history and operating data add context to the engine’s condition.
1,000-hour services, valve lash inspection and adjustment, and routine maintenance tailored to the engine model, operating hours, and manufacturer’s recommendations.
Top-end overhauls, major and full engine overhauls, component inspection, and cylinder head reconditioning.
Raw-water cooling system and aftercooler maintenance and repairs. Reconditioning of raw-water pumps, coolant pumps, and engine lube sump pumps.
Turbocharger reconditioning and balancing, plus injection-pump rebuilding as part of engine repair and fuel-system service.
Wire harness fabrication and cable management for organized engine wiring and service access.
Professional, durable coatings applied in-house to suitable engine components upon request.
Preventive maintenance & guidance
I believe professional service includes helping clients understand their engine’s maintenance needs and the reasons behind manufacturers’ recommended schedules and procedures.
Today’s high-performance marine diesels demand careful maintenance and inspection. Clear guidance helps owners make informed decisions and reduce the risk of preventable failures and costly repairs.
— John Halak, Acert Diesel
02 / Behind the work
A closer look at engine disassembly, onboard work, and the components behind every overhaul. Select a photo to see the full image.
Hands-on engine work with piston and connecting rod assemblies laid out beside the work area.
Engine block and removed crankshaft during disassembly.
Engine block supported by chain hoists, with surrounding surfaces covered for the work.
Cylinder-head handling during onboard engine work.
Cylinder liners and head gasket during engine assembly.
Coated brackets and engine components arranged in the workshop.
Close inspection of a bearing surface during disassembly.
Close view of the assembled engine and surrounding pipework.
Marine diesel engines aboard the vessel.
The details behind an overhaul
Careful work includes labeled parts storage, covered engine openings, prepared components, and protection for the vessel’s work areas.
Engine components stored in labeled, covered totes during the overhaul.
These photographs show the care taken throughout an overhaul project, both in the workshop and aboard the vessel.
Engine openings covered during disassembly and repair.
Covered work surfaces and a hoist setup for cylinder-head handling.
Engine housings, pipework, and brackets arranged in the workshop oven.
Cable management & wire harness fabrication
Before and after engine cable management, showing improved routing and a more organized work area.
Project spotlight
Six photographs from one project, showing the original condition, component preparation, assembly, and installation aboard.
Engine before the workshop work, with its original finish and components visible.
The assembled engine positioned in the vessel’s engine compartment.
Housings, seals, gaskets, and fasteners arranged on the workbench.
A closer look at the painted housings, pipework, and hose connections.
An overall view of the assembled engine in the workshop.
The engine being handled by a hoist above the vessel’s cockpit.
03 / The person behind the work
Acert Diesel is led by John Halak, a third-generation marine diesel technician with a family background in Caterpillar service.
The focus is straightforward: inspect carefully, explain what was found, and recommend work based on the engine’s condition. You work directly with the technician doing the job.
04 / What to expect
Share your engine model, location, service history, and what you are experiencing so we can discuss the right scope.
Inspection and testing help identify the issue. Findings are explained in plain language, with photos where useful.
Review the recommended work and estimate, then coordinate the approved repairs or maintenance.
Let’s talk about your engine
Serving South Florida from Key West to West Palm Beach, including the Florida Keys, Miami, and Fort Lauderdale. Worldwide service is available by arrangement at an out-of-town rate, with travel costs quoted for each project.
Let’s discuss your engine, vessel location, and the work you need.