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Diesel Engines

Whether propulsion & auxiliary, two-stroke or four-stroke engine, or powerplant Genset, we offer you professional maintenance solutions.

Our expertise ranges from propulsion and auxiliary diesel engines to sophisticated dual fuel and gas engines for onboard and shore-based applications. 

We can accommodate all your needs, including routine unit overhauling, fuel systems, turbochargers, automation, governor, and controls.

Since the early days of 1976, diesel engine service and maintenance have been at the center of the INJEGOV SA services portfolio. Highly trained and experienced engineers are available 24/7 to give swift and cost-effective solutions to any situation, thus reducing downtime time and cost.

Our mechanical workshop is a one-stop solution for all engine room needs, saving you time and hassle.
Whether you are close to our base and our two modern service facilities in Piraeus and Istanbul or anywhere globally, our people will be onboard at minimum notice to assist you.

Two-stroke Engine Overhauling

Two-stroke engines are commonly placed on vessels as prime movers and land on power generation applications. At Injegov, we have been providing two-stroke maintenance services for more than four decades. We have developed efficient procedures and our know-how for the benefit of vessel managers and power plant operators.
Our two-stroke engineers and specialist technicians can perform routine maintenance during Drydock or emergency repairs.

Our overhauling teams can perform the following operations:

  • Engine units overhaul including cylinder cover, exhaust valve, piston, and liner
  • Bearings overhauling and inspection
  • Fuel pumps, valve actuators, and roller guides overhauling and timing for MAN & SULZER engines
  • Camshaft overhauling and camshaft segments replacement
  • VIT pistons and reversing cylinders overhauling
  • In situ liner honing and engine block surface grinding
  • Overhauling and calibration of lubricators
  • Main air starting, shut off valves, and air distributor overhauling

Especially for the MAN B&W ME series, we provide the following services:

  • Overhauling of fuel booster pumps
  • Overhauling of hcu and hps accumulators
  • Proportional valves replacement

Our service teams complemented by our workshops, spare part reconditioning services, and fuel system departments, as well as our extensive spare parts stock, make us a one-stop solution for your two-stroke engine maintenance needs.

Four-Stroke Engine Overhauling

Four-stroke medium-speed engines are very popular as a prime mover and power generation for marine and land-based applications.
Every year our technicians and engineers perform hundreds of repair and maintenance projects on four-stroke engines, from routine maintenance to crankshaft and engine block replacement.

We perform engine overhauling projects both on a case-by-case basis and as part of a comprehensive engine maintenance program.


Our engineers can perform the following maintenance services on medium-speed four-stroke engines:

  • Overhauling of cylinder covers including valves, rocker arms, and in situ grinding of seats with unique Chris marine tool
  • Overhauling of pistons and inspection of connecting rods
  • Renewal of main bearings
  • Crankshaft inspection and overhauling
  • Camshaft overhauling
  • Fuel pumps and rollers overhauling and timing
  • Engine block replacement
  • Liner honing

For minimizing downtime of machinery, cost of onboard overhauling and avoiding uncertainties, and low quality of onboard or emergency repairs, Injegov has developed the four-stroke engine parts on exchange concept.
For most common Diesel generating engine types, we maintain complete cylinder covers, pistons with connecting rods, liners, and fuel pumps at our stock which can be provided on an exchange basis. All parts in our inventory are fitted with new consumables, inspected and tested by our workshop team, and supplied ready to serve.

On-exchange engine sets are available for the following engines:

  • MAN B&W L23/30H
  • MAN B&W L28/32H
  • YANMAR N21
  • YANMAR N18
Crankshaft Renewal

The crankshaft is the most critical part of the engine and suffers the heaviest loads during operation. Replacing a damaged crankshaft is always a complex operation that may affect the vessel’s schedule, mainly when the main engine’s crankshaft is damaged.

At Injegov, we undertake dozens of crankshaft overhauling projects every year for marine and power generation applications at the port and while en voyage. We have vast experience in preparation requirements and overhaul—inspection procedures, assembly, alignment, re-choking, and engine testing after repairs. By keeping a substantial stock of crankshafts and understanding all the complexities of a crankshaft renewal project, we can assist owners from start to finish, from procurement of a new crankshaft, transportation, inspection, overhauling, accessory, and electrical works to final assembly, alignment, and testing. We understand minimizing asset downtime is critical.

We ensure fast delivery times and trouble-free arrangements, whether for a big crankshaft of the main engine, power plant engine, or a small auxiliary generator.

For more information on crankshafts currently in our stock >>>>>>>>>>


Workshop Repairs

At INJEGOV, we offer workshop services from our 2 locations in the East Med, providing overhauling and reconditioning of diesel engine parts, governors, and fuel systems components. Minor or major parts with long delivery times may be manufactured swiftly and cost-effectively, under the maker’s specifications and supervision of the vessel’s classification society.
We can restore worn parts to an “as new” condition through proven reconditioning procedures. Our experienced engineers use the most advanced techniques, including automated machines, annealing ovens, and chrome plating facilities, all in-house.
Injegov workshops are fully equipped to cover engine workshop repair requirements, from routine inspection, refurbishment, cleaning, and coating to rectifying or reconditioning parts.

For more information on our workshop facilities
For more information on our reconditioning services 

In-Situ Repairs - Riding Teams

With a continuous presence in the local and international engine & machinery repair market for more than 40 years, INJEGOV S.A. maintains a sizeable pool of skilled and experienced technicians and engineers to undertake voyage repairs worldwide onboard the vessel or at any time plant and industrial installation.

From overhauling a generator to a compressor or other auxiliary machinery inspection or in situ machining, our teams assisted by a strong back-office team can get the job done efficiently and with guaranteed results.

Features of our voyage repair services include:

  • Experienced certified technicians available 24/7 worldwide
  • All are holders of Schengen / U.S. Visa
  • Availability of honing and grinding on-site with specialized Chris-marine equipment
  • BOSIET certified technicians
  • All types of engines/machinery serviced
  • Assistance to all Greek and Turkish ports and shipyards from our Piraeus and Istanbul workshops
Fuel Systems

INJEGOV has extensive experience in fuel equipment repairs. We have a fully equipped fuel systems department with special equipment and benches for diagnosis, repair, testing, original drawings from major manufacturers, and a complete list of spare parts. Our highly skilled staff is constantly training to keep up with the latest fuel injection equipment technology developments.
Our clientele consists of shipping companies and power plant operators who trust us to maintain their fuel systems equipment.

For more information on our fuel system maintenance services.


Since 1976, INJEGOV has been actively involved in the marine automation sector, speed governors, and pneumatic and hydraulic systems projects. Today, with a tremendous amount of experience gained and strategic partnerships with key players in the industry, we can offer complete, turn-key solutions for all your marine-engine-generator automation needs.
INJEGOV has agency agreements with Bosch, HEINZMANN GmbH, Regulateurs Europa, and Zexel.

We can offer a full range of services and solutions, including:

  • Maintenance and Repair Services
  • Governor Sales on an exchange or direct sale basis
  • Control and Monitoring Systems Engine Protection Systems including Oil Mist Detector systems,
  • Spare parts Supply
  • Governor motors supply
  • Speed governor retrofits

For more information on our governor services

Spare Parts

We have accumulated vast experience in procurement and supply of spare parts for two and four-stroke diesel engines through the years. With our local and international contacts, we can get you the correct part in a short time and at a low cost.
We can supply OEM and aftermarket parts of high quality according to customer requirements.
All parts come with IMO numbers and class certificates where applicable.

Besides new parts, we maintain a vast stock with second hand reconditioned spare parts in a warehouse area covering more than 1000sqm. All our secondhand parts are reconditioned and inspected by our technical team and present a cost-effective alternative compared to the supply of a new part.

Our stock includes certified crankshafts, engine blocks, cylinder covers, exhaust valves, seats, connecting rods, pistons, piston rods and piston crowns, water jackets, injection parts, piston rings, etc. bearings, consumables, and even complete engines.

For more information on our spare part stock

Although we are an independent supplier having the advantage of flexibility, we also co-operate as authorized agents and distributors for famous manufacturers of diesel engine components like Bosch for fuel pumps and fuel injection equipment, Gali for air starters, Heinzmann and Regulateurs Europa for governors and actuators, Motortech and PowerUp for gas engine spare parts and components.

Our range of supplies covers the following manufacturers:



Stuck Fuel Rack, Starting Air Valve leakage, Fuel Valve malfunction, Starting air leakage, Malfunctioning of Installed Gauges, Faulty Alarms, Sensors?

As an interconnected system, various factors influence the smooth operation of an engine. Despite the effort, time, and resources used for main engines to run continuously, it is often inevitable for a breakdown to occur.

At Injegov, we have the capacity and know-how to trace the root of the breakdown and develop the most appropriate solution.