Mercruiser 470 Heat Exchangers

[GPappy]

I have been thinking I should put the 4" heat exchangers on my 470s before I put the boat in the water this year. I bought the boat last fall and it still had the 3" heat exchangers. The previous owner said he never had any problems but if I can find a set at a reasonable price it would ease my mind.

Need 2.

Thanks,

Greg

[Just Hook'n]

I had a 470 with a anti-freeze cooling system on it.

Boat ran all day long at the same temp and sipped gas.

Great engine in my opinion.

Not sure if I had 3" or 4" . . . been too many years to remember.

[FsnMachine]

Some say you will be OK this far north. They run these down south in salt water with water temps in the high 80's. But I have not owned one myself. Looked at some but did not buy.