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Unread 01-15-2013, 02:47 AM
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Default heat exchanger

I want to enlarge my heat exchanger it was suggested to me from spares if i remeber correctly ---now do i buy a lager one or run another small one with the one i got--the reason why i want to incerease the size of it cause my engine will produce more power so more heat will come with it--Im removing the water pump and fitting a electric one that flows 115gph there is a 80gpm but i think its too small---had a look on ebay au seems theres not much in heat exchangers
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Unread 01-15-2013, 06:58 AM
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change over to the 4" (10 cm) heat exchanger. I don't see any reason to change the circulation pump, if you move the water too fast, it won't have time to transfer the heat. The pump on the engine works fine. If you have to have an exchanger manufactured for you boat, measure to see if a larger one would fit. I'd rather have a bigger exchanger than a bigger circulation pump
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Unread 01-15-2013, 11:46 AM
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Agreed..... I think that you are better off with the stock pump
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Unread 01-15-2013, 07:22 PM
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Quote:
Originally Posted by spareparts View Post
change over to the 4" (10 cm) heat exchanger. I don't see any reason to change the circulation pump, if you move the water too fast, it won't have time to transfer the heat. The pump on the engine works fine. If you have to have an exchanger manufactured for you boat, measure to see if a larger one would fit. I'd rather have a bigger exchanger than a bigger circulation pump
do you measure the outside and what about the length what should that be
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Unread 01-15-2013, 07:25 PM
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the reason i want to use a electrical pump is i want to do away with the seal in the timing cover and i dont like the extra load the pump puts on the timing chain and i will gain a little hp as well
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Unread 01-15-2013, 07:56 PM
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The one thing wrong with the electrical pump is that if the engine quits running, the pump will not stop and could cause water to flow back into the risers. This could cause water ingestion problems that could easily kill an engine. I would personally stay with the pump on the engine and get a bigger heat exchanger.
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Unread 01-15-2013, 08:33 PM
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same length as the small one, just bigger diameter, i think its the size of the end cap
heres a 4" http://www.ebay.com/itm/MERCRUISER-3...7ff6a4&vxp=mtr
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