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...