After fixing one problem there is a new one. my 65 hp mercury shifts into forward gear fine, neutral is ok to, but when you shift into reverse it makes a grinding noise and has very little torque, will hardly move the boat backwards. I checked the shift cables, the problem wasn't there, I removed the cable and changed the gear by hand, forward gear engaged fine, neutral also, but when I pulled the shift rod back to put it in reverse it started grinding. It does engage into reverse but still makes that noise but has no torque. I feel the problem is in the lower unit. The other problem I have found is water is getting in the lower unit. Is it worth trying to rebuild or should I look for a salvage or new replacement. Or just keep running it with foreward gear only after I stop the water getting in the lower unit. <br /><br />I do believe the old saying " The best days of boating are the day you bought it and the day you sold it" Thanks Tim