Mercury Gearcase lower unit 20" shaft 1643-4517

Description

Merc lower unit from a 1978 50hp, shifts good, works for 71-79 40-70hp motors, not for the 4 cylinder 65hp but will work on 3 cylinder 65hp. I ran this on a 50hp that had a bad powerhead, when i removed it i noticed water in the oil, i drained and put fresh oil in it and it sat in my shed. i recently pressure tested it and the drive shaft seal and maybe the shift shaft seals are leaking. the prop shaft seal looks ok which is good because that one is alot more involved. So for about worth of seals you will have a good unit. Shipping quote is for lower 48 states only, all others ask for quote. thanks