85 hp 1973 evinrude .Went to the river last weekend and was pulling a skier and the shifter got hung full throttle.I killed it and shifter would not come back up easy,so I forced it up.When I put it in neutral and started it and put it in gear it wouldn't go in gear, just reved up. I had to undo the cables on the motor to get it to go in forward, I adjusted the cables and now I have no reverse. Seems to me it's coming from the throttle control.What can I do???