I have a 1976 evinrude 85hp 85693g outboard on a 1986 glasstream bass boat. One said it was like the motor wanted to jump off the boat when shifting to forward. One hint was to shift quickly to forward which did help a bit. Well my boy took the boat out this weekend and the shifter locked in forward. I imagine its like a clutch but I don't know where to start looking , in the lower unit or the foot? and maybe what this might cost to fix? New here and Thank you for such a neat fourm.