Medium Speed Engine Services
Specialist maintenance, overhaul, and repair coordination for medium-speed marine diesel engines operating at 300–1,000 RPM.
What Are Medium Speed Marine Engines?
Medium-speed marine engines operate between 300 and 1,000 RPM and are the primary power source for cargo ships, tankers, large ferries, and offshore vessels. With bore sizes ranging from 200mm to 600mm and power outputs from 1 MW to over 20 MW, these engines are precision-engineered systems that require specialist knowledge for maintenance and overhaul.
Proper maintenance planning is critical. A single unscheduled engine failure on a commercial vessel can cost hundreds of thousands in lost revenue, emergency repair, and off-hire time. Our team helps operators stay ahead of wear patterns with structured service scopes, clear documentation, and coordinated parts supply.
Service Scope
What We Cover
Complete Engine Overhauls
Full disassembly, inspection, and precision rebuild of medium-speed marine diesel engines.
Piston & Liner Replacement
Cylinder liner honing, piston ring replacement, and clearance verification for optimal sealing.
Crankshaft Inspection & Grinding
Deflection measurements, journal grinding, and crankshaft alignment verification.
Fuel Pump & Injector Servicing
High-pressure fuel pump overhaul, injector nozzle testing, and fuel timing calibration.
Governor & Control Calibration
Speed governor adjustment, load-sharing calibration, and control system verification.
Bearing Inspection & Replacement
Main and connecting rod bearing inspection, clearance measurement, and replacement coordination.
Exhaust Valve Overhaul
Valve seat grinding, spindle inspection, hydraulic actuator testing, and valve cage reconditioning.
Engine Alignment & Foundations
Laser alignment, chock replacement, foundation inspection, and vibration analysis.
Performance Data
Medium Speed Engine Comparison
RPM ranges, power output, and bore sizes across common medium-speed engine platforms.
Cargo, Ferries
Tankers, Offshore
Cargo, Ferries
Large Cargo
Commercial
Cost Analysis
Why Scheduled Maintenance Wins
Proactive maintenance dramatically reduces total cost of ownership compared to reactive repair-only approaches.
Scheduled Maintenance
98%
Uptime
$80–120K/yr
Annual Cost
0.2/year
Incidents/yr
Reactive Repair Only
88%
Uptime
$250–400K/yr
Annual Cost
2.4/year
Incidents/yr
Annual Maintenance Cost
Engine Uptime
Unplanned Downtime Risk
* Figures based on industry averages for medium-speed marine engines in commercial vessel operations. Actual costs vary by engine type and operational profile.
Brands We Service
Medium Speed Engine Platforms
MTU
Series 8000 medium-speed marine platforms
Cummins
QSK60 and QSK78 medium-speed engine series
Deutz
Medium-speed marine diesel and gas engines
Caterpillar
3600 series and MaK medium-speed engines
Volvo
D16 and large-bore Penta marine platforms
Wärtsilä
W20, W26, W31, W32, W46 engine platforms
Request a Service
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