Re: 1986 50 hp evinrude reverse prob.
Check the shift linkage to make sure it's pushing the shift arm all the way into reverse. Another way would be to disconnect the shift linkage at the motor and try moving the shift lever by hand and see if it works right. Do this on the water with someone driving the boat at idle. If this works OK, your linkage is off or you may have a streched shift cable if you cannot adjust it enough to get reverse properly. Make sure you shift with authority. Don't slam it into gear, but don't baby it in, either.