Main Engine 4-Stroke
A four-stroke main engine completes intake, compression, power and exhaust in four piston strokes per cycle, turns far faster than a slow-speed two-stroke of comparable power, and needs a reduction gearbox to bring propeller shaft speed down to something a propeller can use.
Models in this type.
Models 3,901 to 4,000 of 4,472 in Main Engine 4-Stroke. Every row links to full specifications, documents and service notes.
Also in Main Engines (4-Stroke).
The other equipment types in this category.
One request. A person reads it and replies by e-mail.
Tell us the manufacturer, the model and what you need — a part, a service call, a second opinion. A person reads every request and replies by e-mail.
No details at hand? A photo of the rating plate or the part is enough — simply attach it to the request.
Three things people ask first.
Is Main Engine 4-Stroke data free?
Yes. Every model page, every guide and every datasheet for this type is readable without an account. An account adds saved searches and requests, nothing is taken away.
My model is missing — what now?
Send us the nameplate. We identify it by hand, add it to the library, and if you need a part or a service, the request is already on our desk.
Can you source a Main Engine 4-Stroke part?
Yes. Tell us the manufacturer, the model and what you need — a person reads every request and replies by e-mail.