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converting mercruiser 502(415hp) to fresh water cooled ? anyone familiar with it?

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Old 10-02-2008, 04:57 PM
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Default converting mercruiser 502(415hp) to fresh water cooled ? anyone familiar with it?

.

i recently bought a boat that was only used in fresh water , now i am going to be using it in saltwater so i want to make the engines fresh water cooled

the motors are mercruiser 502(415hp).

mercury makes a kit , has anyone done this ?

is it worth it ?

does anyone else make a kit/conversion?

thanks in advance
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Old 10-02-2008, 06:11 PM
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I did that to my original stock 454 magnum mpi, which is basically the same engine as you have. I bolted on a Mercuiser kit that I got from Bam. It fit like a glove and worked perfectly. In fact, when I upgraded my engine to my current 700 hp , na 540, I bolted the kit on that engine. Surprisingly, it works great on it as well. No overheating issues at all. See attached link...

http://www.mercruiserparts.com/Show_...COOLING+SYSTEM
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Old 10-02-2008, 09:20 PM
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thank you
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Old 10-06-2008, 10:23 PM
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ttt
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Old 10-07-2008, 01:15 AM
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Thought about it......but added fresh water flush instead.
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Old 10-07-2008, 04:15 AM
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Monitor Marine Products has a nice kit . I just bought thr 500-700 HP version went together very nice.
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