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I am re-powering my 1979 17' Montauk and going from the original 1979 Merc 90HP tower to a 1985 115HP tower. Trying to keep the boat as original as possible, but the 90 (with distributor) is too much trouble.

Two questions for anyone that has this setup:

1) How far off the transom is your engine mounted?
2) What size prop are you using and what is the WOT speed and RPM

Thanks to all in advance.

Jim