Drive shaft coupler/flange replacement

[nkorep2]

So, Im basically ready to reinstall the motor in my boat. I need to replace the drive shaft coupler/flange. Its very corroded and needs to be changed. The shaft seems to be in good shape and Id hate to have to replace both if the shaft is fine.

Is there a source for the flange itself?

I have a 1990 Prostar with powerslot tranny.

Thanks,
Nikolai