heat exchanger

[aussie]

Originally Posted by spareparts

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