Diesel engines are the heart of every vessel and therefore form a core service of our business. With fully qualified diesel technicians, Marine Power Systems are the only company on the Coromandel peninsular specialising in large diesel engines and propulsion systems. 

We provide a range of services from basic servicing through to complete rebuilds.

Our workshop in Kopu, near Thames, serves as the New Zealand repair and servicing facility for Steyr Motors and we also provide mobile support for these engines throughout New Zealand. Within the local area we also provide service for Caterpillar, Cummins, Doosan, MAN, John Deere, Perkins and Scania engines.

Marine Power Systems also have a satellite workshop based within the Whangamata marina hardstand area, offering technical services to all luxury vessels based on the east coast of the Coromandel and Bay of Plenty. 

C32 repairs
D2842 rebuild

Services we provide…


Engine servicing

Routine servicing and preventative maintenance for most makes and models of engine.


Repair and rebuilds

Major repairs for engine and transmissions through to full rebuilds.


Fuel system maintenance

Injector testing and overhaul. Fuel pump timing and complete pump overhauls.


Water pump repairs

Seawater and freshwater pump repairs. Seal and bearing replacement, rectification of pump leaks.


Borescopic Inspections

Assessment of internal items using borescopic visual inspection.


Cylinder head overhauls

Head machining, valve guide and seat replacement, crack testing and hydrostatic pressure testing.


Heat exchanger cleaning

Heat exchanger, intercooler and transmission cooler maintenance. Cleaning, anode replacement, and pressure testing, Repairs to damaged or corroded coolers.



Diagnostic tooling and software to access most modern electronic engines.


Power measurements

In-situ power measurements direct from the output shaft or dyno testing.