Low-speed two-stroke crosshead main engines for direct propeller drive on merchant vessels.
Every equipment type in Main Engines (2-Stroke) links to full manufacturer and model data, specifications and service notes.
All 43 manufacturers with models in Main Engines (2-Stroke). Names with a manufacturer page open it; the others open a search across the full library.
All manufacturers1,795 models across 2 types, grouped by manufacturer — the complete list behind the type cards above.
A two-stroke main engine completes a full working cycle — intake, compression, power, exhaust — in a single crankshaft revolution, against the four revolutions a medium-speed four-stroke needs for the same cycle. That single fact drives almost everything else about the type: one power stroke per cylinder per revolution at low rpm produces enormous torque directly at the crankshaft, so the engine can be coupled straight to a fixed-pitch propeller without a reduction gearbox. There is no camshaft-driven inlet valve either; scavenge air enters through ports uncovered by the piston…
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