I have a Kiekhaefer Mercury 35 Hp outboard, S/N 2242031 (1967,68,69). I also have a spare Mercury 35 Hp S/N 1961234 (1964,65,66). I would like to remove the starter and the "ring gear" (the gear that the start motor engages) from the spare motor and install it and the starter on the 67,68,69 motor (it has no ring gear). Can anyone please tell me if the ring gear will fit on the 67,68,69 motor. Should I take the motors to a shop to have this done? Thanks a million for advice. Soddy