Yep had 2 heads on my 165 flushed everytime and both rotted out at the #1 plug, junked it the second time.
Freash water cooled is the only way to go and they still have some issues but not as many.
I have had both and I will never go back to I/O Just to much to maintain IMO
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1986 V20 
Old Fishermen never die, we just SMELL that way!!
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