Boat Engine Cooling System

i have a 350 chev set up for salt water but now want to return it to the original configuration without the chev water pump and heat exchanger, and just rely purely on the impeller pump picking up from under the boat, and thru the engine, back into the exhaust
sorry, didnt explain myself very well. The boat is now only run in fresh water, not salt water so the heat exchanger is no longer necessary, and generally runs warmer with the exchanged than without

Marine engines, as well as automotive engines are, cooled by circulating water thru the engine block. Marine engines are unique in that there are two different types of cooling systems. The standard raw water system, and the fresh water (commonly known as the closed) cooling system.

2009-01-09 23:19:50 by Glenn B

Hello there, here i present you iLLPADRINO II who is the first Rc Nitro Model in the World who run with a Fuel Cooling System. This Boat is a ...

If the cooling system is in good working order, what possible way is there for it to over heat?

The "flywheel fan" turns at the same speed as the engine. If the engine is heavily loaded it slows down, so it's not cooling as well and at the same time generating more heat. See Answer above.

2010-11-01 18:48:45 by Mariah

Price: $5.95 $5.95

As opposed to any other cooling system, what are the advantages?

1. Smaller and lighter.
2. Less corrosion in the block and the lower unit if equipped
3 they don't waste power on pumps
4 less maintenance

2010-11-01 18:52:46 by Mariah

Price: $21.95

If the engine was to over heat although there is an air-cooling system in perfectly good health, how could you prevent that in the first place?

Don't overload the engine.

2010-11-01 18:50:22 by Mariah

I got a 93 Sea Rayder jet boat with 90hp Mercury engine. I was told I need to flush the engine with fresh water every time I use it in the ocean. Is that true? Can someone explain me how the cooling system works in this type of engine? Thanks

To add to previous posts;
Without getting into zincs/sacrificial anodes, etc....here's a good rule of thumb: If you put in/take out of saltwater (like you would with a small trailerable boat like yours), wash everything you possibly can!! There is nothing worse in the world for boats than saltwater....sun is a close second.
Stop at the "do-it-yourself" car wash on the way home and thoroughly rinse the hull....flush engine when you get home. Wipe down all vinyl, gauges, etc.

Salt/sun=bad

2008-06-17 07:56:03 by Peluso p