How to Convert Car Engine to Boat Engine

March 17, 2024

You can put a car engine into a boat but it won’t work very well without some modifications. Boat engines are designed for a different environment and they have different requirements.

A boat engine needs to have a heat exchanger so it can run on water instead of air. It also needs to be able to handle the salty water it will encounter. It will probably need an oil change more often than a car engine does, too. The cooling system will need to be modified, too. Cars use a radiator while boats usually use keel coolers or exhaust gas heat exchangers.

Most boat engines aren’t built to be as high rpm as car engines are. This is because they need to produce a lot of torque for the boats they’re used in.

Marine engines are also designed to withstand corrosion and humidity. They’re typically made from cast iron rather than aluminum.

They are usually liquid cooled, too. They may use a separate coolant pump or they may be able to take in some of the water from the bilge. They may also have different spark plugs than a car engine uses.

It is possible to convert a car engine into a boat engine but you’ll need a lot of tools and knowledge to do it properly. It’s much easier to just buy a marine engine from the start than it is to try to make an automotive engine work in a boat.


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