Four Stroke Engines
Auxiliary power and generator engines with superior fuel economy
Engine Components
- Cylinders Liners
- Piston Crowns
- Piston Skirts
- Cylinder Heads
- Exhaust Valve Spindles
- Valve Seats
- Valve Cages
- Plungers
- Fuel Pumps
- Bearings
- Piston Rings
Looking for two-stroke engine parts?
View Two-Stroke PartsFour-Stroke Marine Diesel Engines
Four-stroke marine diesel engines are commonly used for auxiliary power generation, smaller main engines, and generator sets. These engines offer better fuel economy at lower loads and are easier to maintain. We maintain extensive inventory of genuine and OEM parts for all major four-stroke engine brands.
Yanmar Four-Stroke Engine Models
Japanese precision engineering for auxiliary power
Daihatsu Four-Stroke Engine Models
Reliable four-stroke engines for marine applications
MaK Four-Stroke Engine Models
German engineering excellence in marine propulsion
Wartsila Four-Stroke Engine Models
Finnish innovation in marine power solutions
MAN B&W Four-Stroke Engine Models
World-leading four-stroke engine technology
Bergen Four-Stroke Engine Models
Norwegian quality in marine diesel engines
Sulzer Four-Stroke Engine Models
Swiss precision in four-stroke engine design
Pielstick Four-Stroke Engine Models
French engineering for marine applications
Stork Werkspoor Four-Stroke Engine Models
Dutch heritage in marine engine manufacturing
Hanshin Four-Stroke Engine Models
Comprehensive range of Japanese marine engines
Caterpillar Four-Stroke Engine Models
American reliability in marine power systems
Nigata Four-Stroke Engine Models
Japanese innovation in auxiliary power generation
Four-Stroke Engine Parts — Common Questions
Answers to specific questions our clients ask about sourcing four-stroke marine engine parts.
Do you supply reconditioned cylinder heads for Yanmar N330 and N280 auxiliary engines?
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Yes. Reconditioned cylinder heads for Yanmar N165, N280, N330, and S165 series auxiliary engines are available from stock. Each head undergoes valve seat re-cutting, valve guide replacement, and a Hydraulic Pressure Test to verify water jacket and combustion chamber integrity before dispatch.
What spare parts are included in a complete overhaul kit for a Daihatsu DK28 auxiliary engine?
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A standard overhaul kit for a Daihatsu DK28 includes: cylinder liner, piston assembly (crown and skirt), chrome piston ring set, cylinder head gasket set, inlet and exhaust valve sets, valve guide and seat ring inserts, and main and connecting rod bearing shells. We can supply these as a bundled kit or individually.
Can you source a complete fuel injection pump for a MaK M32 engine?
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Yes. Complete fuel injection pump assemblies for MaK M20, M25, M32, and M43 series engines are stocked. Recovered units are pressure-tested for correct fuel delivery rate, and plunger-to-barrel clearance is verified against OEM tolerances. We can also supply individual plunger and barrel sets for reconditioning.
Do you stock rocker arm assemblies and pushrods for Wartsila L32 and L46 four-stroke engines?
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Yes. Rocker arm assemblies, pushrod sets, and camshaft followers for Wartsila L20, L26, L32, and L46 series engines are in our inventory. These components are inspected for wear on the contact pad and rocker bush, and dimensionally verified against OEM specifications before supply.
How is the valve seat tightness on a reconditioned four-stroke cylinder head verified before dispatch?
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After grinding and lapping, valve seat tightness is verified using a pneumatic leakage test where pressurized air is applied to the combustion chamber with the valves closed. Any leakage past the seats is detected by air flow measurement. The blue marking (engineer's blue) method is also used to verify the full 360-degree contact ring between the valve and seat.
Need Specific Four-Stroke Engine Parts?
With over 212+ engine models in our inventory, we can supply parts for virtually any four-stroke marine engine. Contact our team for detailed specifications, availability, and competitive pricing.