I had a 1975 V20 Cuddy with a 1986 175 Yamaha. I used a hydro foil and it helped a lot with hole shots and getting up on plane faster. I did this when it was a I/O and then after I converted it to the outboard. I have never had a motor with out one since, except for the one I have now, but I just installed trim Tabs.
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1986 V20 
Old Fishermen never die, we just SMELL that way!!
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