I have aquired a 1965 75hp model#75593S to mate to my needs everything 1959 17ft. uniflite. my v-4 is only pushing 65-70lbs on several compression tests, Have found a powerhead with 118-120 lb's
is this worth the effort I do have all controls for the selecric shift,or what year motor hp? could still use that control setup?
Most of the old V4's I've had tested in the low 90's to mid 120's but were in the 10% range. Lower than that they were hard starting and sluggish. The powerhead you mentioned should be good. A swap of upper motor should not be of any concern to what shift you have if it's the same vintage, shaft spline count and bolt pattern. You can also scavenge bracket and electrical parts from the old motor. Assuming you're talking short block.