Diesel Service

What Diesel Service does

Diesel Service OÜ is a privately held Estonian marine diesel engine service company founded in 2004 and headquartered in Tallinn. The company repairs, overhauls, and reconditions diesel engines and related components for commercial shipping operators and marine vessel owners, with named clients including Wilson, TS Shipping, RIX Shipping, Netaman, and HS. Its core technical assets are a 3,000m2 workshop, 430m of dedicated quays, a 1000kW test bench, a CNC machining center, and a DNV-approved laser cladding cell used to recondition worn parts such as turbocharger shafts, pump shafts, pistons, valves, and cylinder head bores at 50-70% cost savings versus new OEM parts with delivery from two days. The company is an Authorized Marine Dealer for Caterpillar and MaK and an MTU representative partner, supplying spare parts and engines across CAT, MaK, Wärtsilä, MAN, Rolls-Royce, Mitsubishi, Yanmar, and Cummins brands.

The business operates as a B2B industrial services provider with a direct enterprise sales motion, delivering services both onboard vessels and in its workshop. Its revenue derives from professional services (overhauls, reconditioning, in-situ machining, turbocharger and fuel equipment repair, refit/conversion projects) and from hardware sales (CAT propulsion engines, CAT gensets, own-brand DS Custom Gensets, power management and automation systems, and spare parts). Pricing is quote-based with multi-year contract arrangements; no public pricing exists. Distribution is direct to enterprise shipping customers, supplemented by OEM dealer channel access.

Operationally, the company employs 35 staff and serves European and international maritime customers, with onshore workshop capacity and offshore (onboard) service capabilities. The most strategically significant recent moves are the 2024 acquisition of CAT/MaK Authorized Marine Dealer and MTU representative status, the launch of own-brand DS Custom Gensets and Power Management/Automation lines, and the prior buildout of DNV-approved laser cladding infrastructure — moves that push Diesel Service from a regional repair workshop into a multi-OEM service and original equipment player.

Name

Diesel Service

Legal name

Diesel Service OÜ

Website

https://diesel.ee

Company type

Private

Founded year

2004

Operating status

Operating

Headcount range

1–10 employees

Short description

Diesel Service OÜ is a Tallinn-based marine diesel engine service company that repairs, overhauls, and reconditions engines and parts for commercial shipping operators, operating as an Authorized Marine Dealer for Caterpillar and MaK and a representative partner for MTU.

Ownership category

akta.pro rank

Product category

Marine Engine Repair & Maintenance Services

NAICS

Ship Building and Repairing (336611)

SIC

Ship & Boat Building & Repairing (3730), Engines & Turbines (3510), Wholesale-Motor Vehicle Supplies & New Parts (5013)

akta.pro primary industry

Propulsion MRO, Spares & Field Service (Overhauls, retrofits, upgrades) (IMAJAHAN)

akta.pro secondary industries

Diesel Engine Repair, Overhaul & Remanufacturing (TLAKABAB), Fuel & Emissions Systems for Propulsion (Fuel supply, SCR, EGR, exhaust aftertreatment) (IMAJAHAK), Marine Diesel & Dual-Fuel Engines (IMAJAHAA)

Keywords

• Marine diesel engine repair
• Engine maintenance services
• Laser cladding reconditioning
• Marine spare parts distribution
• In-situ onboard machining

Headquarters

HQ city

Tallinn

HQ country

Estonia

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Infrastructure, Supply Chain, Marketing or Sales

Revenue model

1. Diesel Engine Repair and Overhaul Services: Major overhauls, maintenance, and repair services for diesel engines both onboard vessels and in workshop. Includes cylinder head overhaul, piston inspection, fuel equipment overhaul, crankshaft replacement, and engine recovery.
2. Reconditioning Services: Laser cladding technology for reconditioning worn engine parts including turbocharger shafts, pump shafts, pistons, valves. Offers 50-70% cost savings compared to new parts with 2-day delivery time.
3. Spare Parts Sales: Authorized Marine Dealer supplying CAT and MaK spare parts. Additional brands through partner network including Wärtsilä, MAN, Rolls Royce, Mitsubishi, Yanmar, Cummins.
4. Product Sales - Engines and Gensets: Sales of Cat propulsion engines, Cat gensets, and custom DS gensets. Power range from 10kW to 2525kW for various marine applications.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels2 records

Core offering

Diesel Service provides repair, maintenance, major overhaul, and reconditioning of marine diesel engines — delivered both at its Tallinn workshop and onboard customer vessels worldwide. The company operates as a Caterpillar and MaK Authorized Marine Dealer and MTU representative, distributing engines, gensets, and spare parts, while offering proprietary services such as DNV-approved laser cladding reconditioning, in-situ machining, turbocharger overhaul, fuel equipment repair, and refit/conversion projects for commercial shipping operators.

Product overview

Diesel Service is a marine diesel engine repair and maintenance company operating as a Caterpillar and MaK Authorized Marine Dealer and MTU representative partner. The product portfolio combines resale of Caterpillar engines (propulsion engines and gensets) with proprietary custom gensets, power management/automation systems, and a comprehensive suite of workshop and onboard services including major overhauls, turbocharger service, fuel equipment repair, in-situ machining, laser cladding-based reconditioning, re-engineering, and refit/conversion projects. The company operates a 3000m2 workshop with CNC equipment, laser cladding cell, and 430m of quays in Tallinn, Estonia.

Differentiator

Problem solved

Functional benefit

Products and services

• Cat Propulsion Engines Caterpillar marine propulsion engines supplied as an Authorized Marine Dealer, for pleasure crafts and commercial vessels ranging from C7.1 (208kW) to 3516 series (up to 2525kW), backed by worldwide Caterpillar service network support.
• Cat Gensets Authorized Caterpillar auxiliary, harbor, and emergency marine generator sets compliant with IACS regulations, ranging from C1.5 (10–13kW) to C32 (550–940kW) engine models.
• DS Custom Gensets Custom-built generator sets configured to customer specifications using globally sourced components, available with CAT, Doosan, or John Deere engine ratings from 55kW to 980kW.
• Power Management and Control/Automation Systems Marine vessel control and automation systems including FPP/CPP propulsion controls, engine monitoring and alarm systems, thruster controls, power management systems, vessel management systems, fuel monitoring, switchboards, and motor starter boxes.
• Marine Diesel Engine Spare Parts Supply Spare parts supply as Authorized Distributor for CAT and MaK, plus sourcing through partner network for Wärtsilä, MAN, Pielstick, Rolls Royce, Mitsubishi, Himsen, Yanmar, Daihatsu, Cummins, and Niigata; includes re-engineering and reconditioning for obsolete or unavailable parts.
• Major Overhauls Diesel engine repairs and major overhauls delivered both onboard vessels and in workshop, including cylinder head overhaul, liner honing, piston inspection, connecting rod work, fuel equipment overhaul, air cooler service, crankshaft replacement, and in-house testing up to 1000kW.
• Turbocharger Overhaul and Balancing Turbocharger service including rotor disassembly, inspection, cleaning, balancing up to 200kg, rotor and nozzle ring repair with laser cladding, re-blading, and spare parts supply.
• Fuel Equipment Repair Overhaul services for standalone and in-line high-pressure pumps, fuel injectors, injector units, CAT 3500 series fuel injector pumps, common rail equipment, and dual fuel injectors.
• In-Situ Machining Onboard machining services using portable equipment for main engine block landing surfaces, collar machining, main bearing bores line boring, stern and rudder tube boring, and auxiliary equipment bearing bores.
• Reconditioning Services (Laser Cladding) DNV-approved laser cladding reconditioning of worn engine parts including turbocharger shafts, pump shafts, piston ring grooves, valves, cylinder head bores, cast iron and bronze parts, achieving 50–70% cost savings versus new parts with delivery from 2 days.
• Re-Engineering and Machining Manufacturing of new parts or upgrading existing designs when spares are unavailable, supported by CNC machining (2500x1000x1000mm working zone), grinding, welding, and 3D CAD software.
• Refit and Conversion Projects Vessel repowering and equipment upgrade support from technical inspection through commissioning, including main and auxiliary engine replacement, custom generator sets, propulsion controls, vessel automation, and BWTS installation.

Quantifiable outcome

• Saves 50-70% compared to cost of new parts through laser cladding reconditioning
• +2 more outcomes

Named customers5 records

Segments2 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Six partnerships are on record, tiered core and minor.

• CaterpillarcoreChannel Partner/ Reseller/ DistributorCaterpillar and MaK Authorized Marine Dealer status. The company is an authorized distributor for CAT propulsion engines, CAT gensets, and MaK spare parts. Worldwide Caterpillar service network supports customer operations.
• MaKcoreChannel Partner/ Reseller/ DistributorCaterpillar and MaK Authorized Marine Dealer status. Company is authorized distributor for MaK spare parts. Focus on MaK and CAT spares as authorized distributors.
• MTUcoreChannel Partner/ Reseller/ DistributorMTU representative partner. Company serves as MTU representative partner providing products and support.
• WärtsiläminorChannel Partner/ Reseller/ DistributorSpare parts supplied through extensive partner network for Wärtsilä engines.
• MANminorChannel Partner/ Reseller/ DistributorSpare parts supplied through extensive partner network for MAN engines.
• Rolls-RoyceminorChannel Partner/ Reseller/ DistributorSpare parts supplied through extensive partner network for Rolls-Royce engines.

Scale indicators6 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Wärtsilä Services: Wärtsilä operates a global marine engine lifecycle service network providing overhauls, reconditioning, spare parts, and field service for 4-stroke and 2-stroke marine engines. It is the most direct competitor to Diesel Service for Wärtsilä-powered vessels calling at Baltic ports, with overlapping service offerings and a comparable in-situ/onboard capability.
• Pon Power: Pon Power is one of Caterpillar's largest marine and industrial engine dealers in Northwestern Europe, offering propulsion engines, gensets, spare parts, and full workshop services. It is a direct comparable to Diesel Service given the shared authorized-dealer model, similar product mix, and overlapping customer base in marine and offshore.
• Zeppelin Marine: Zeppelin is a Caterpillar dealer covering parts of Germany and Northern Europe with marine engine sales, service, and parts. It runs the same authorized-dealer playbook as Diesel Service and competes for medium-power marine engine overhauls and reconditioning in the Baltic/North Sea region.

Regional players

• Hoyer Marine Diesel: Hoyer Marine is a Northern European marine engine service provider offering workshop and onboard repair, reconditioning, and spare parts for marine diesels. It is a strong regional comparable to Diesel Service given similar service scope, schematic customer base, and emphasis on in-situ machining and engine overhauls.
• Briggs Marine: Briggs Marine provides marine contracting, vessel maintenance, and offshore support services across the UK and Northern Europe. While broader in scope than Diesel Service, it overlaps around marine diesel support, shipyard services, and emergency callouts supplied to commercial vessel operators.
• Verolme Shipyard Group: Verolme operates Northern European shipyards that handle refit, conversion, and diesel engine overhauls for commercial vessels. It competes for similar refit and engine-replacement projects but at a bigger physical scale than Diesel Service, making it a regional pure-play in the marine MRO market.

Broad incumbents

• Caterpillar Marine: Caterpillar's marine division sells Cat and MaK propulsion engines and auxiliaries, supported by an authorized dealer network. Diesel Service is one such dealer, but Caterpillar's own dealer program and competing dealers (e.g., Pon Power, Zeppelin) compete for the same vessel service and parts business across Europe.
• MAN Energy Solutions (PrimeServ): MAN Energy Solutions and its PrimeServ after-sales division manufacture marine diesel and dual-fuel engines and operate a worldwide MRO network serving MAN B&W and MAN auxiliaries. It is a broader incumbent than Diesel Service, but directly competes for onboard service, reconditioning, and spare parts on MAN-powered vessels in Northern Europe.
• Rolls-Royce Power Systems (MTU): MTU is a major marine and industrial engine OEM with its own global service network. Diesel Service acts as an MTU representative partner, so the relationship is partly cooperative, but MTU's own service hubs compete for the same onboard repair, overhaul, and parts work on MTU-powered vessels.

Others

• Kongsberg Maritime: Kongsberg Maritime supplies vessel automation, power management, propulsion control, and integrated bridge systems to commercial shipping. It is an enabling/adjacent player to Diesel Service, which sells its own power management and automation products as part of refit packages.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Diesel Service