marine engines

[lardy1]

how easy is it too marinise an engine,and would it be a good idea to use a marine engine in a bike project???,many thanks.

[Crazymanneil]

Moved thread to engine related topics as it might have been missed where it was.

N

[IgorVigor]

I dont know a huge amount about boats tbh, but I know there are 2 methods of water cooling boat engines...

There is the method as used in cars/bikes/etc which is a closed cooling system.
The advantage of using one of there engines in a bike project is its no different to using a car engine or water cooled industrial.
As long as you remember to fit a radiator...

The other method I know of is raw water cooling.
This method basically pulls sea water through the engine, which means you dont have to worry about a rad getting damaged.
The problem though, is it means that your engine (iron or alloy/aluminium) is pulling corrosive sea water (with god know what other contaminants) straight through your engine.

You can normally convert a raw water cooled engine to a closed loop system, but you really have to check the condition of the cooling passages...
iron engines rust badly, and alloy/aluminium corrodes badly...

I hope that helps, as thats about all I know...

[coachgeo]

I may be wrong so just keep an eye out for it buttt.... I think a number of the marine engines are low rpm chuggers not the 3000-3600 best used for diesel bikes.

[Sphere]

My dad has a 20hp Bukh in his boat. This thing is aircooled to the best of my knowledge. Most marine diesels aren't very high rpm, but I think Hatz G engines are also used in boats.

[johnfireball]

Hi all,
I worked on the 20hp Bukh and its watercooled with a choice of closed loop or seawater cooling. With seawater cooling the water is pumped out into the exhaust. A sacrificial zinc anode is fitted into the block to try and prevent corosion. An engine would need to be all cast iron to withstand hot salt water.
John.

[Sphere]

Oops. I think I know, it has a dry exhaust. Certainly not aircooled. Sorry for the misinformation.