Re: 1983 Chrysler 90 prop
If it is the one piece lower unit try right here at iboats. The one piece lower unit has 15 splines on the prop shaft and is the same for all 3 and 4 cylinder engines up to about 1989 and possibly later. So you may need to reference Force engines. Don't be surprised though: there is not much choice available.
If it is the two piece lower unit, then I think you will need to contact Franz Marine I don't thing anyone makes a new prop for that unit.
