Marine, although I don't know if it is Marine exclusively. I only know because it's the one in my boat. :)
Some marine engine's may rotate in opposite direction need to check rotation of engine
No, it would not be able to handle engine braking.
Lawnmower. It's a Briggs & Stratton engine.
1975 ford truck engine block
If it's an original engine, call a GM dealership and give them the VIN number.
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No, a marine engine is going to use corrosion resistant components in the cooling system and the freeze plugs. Also, the camshaft will be designed to meet the different power needs of a boat as compared to a car or truck. A car engine to run be used for the majority of the time at half or less of the RPM that it red lines at, where a marine engine is most likely going to be derated to run at "top speed" for the majority of the time which wil be well under the red line RPM of an automotiv engine.
There is usually a dataplate on either the valve cover or on the side of the block. If it's missing or unreadable, you can call any International truck dealer with the last 8 digits of the VIN (assuming it is the original engine), and they can give you the engine serial number.
Yes, the VIN number will identify the model, color, engine, trim, and other features of your vehicle.
its a 75 to 79 440 out of a truck or motorhome.
The engine is located in the back of the truck.
In most respects, yes. There will be differences because of design differences, but its the same function in both cases. In small ships and boats a truck engine is simply dropped into the ship with the different power couplings. In most freighters and larger vessels, the diesel engines are much largers than any truck would use.