I have an 02' Merc 25 which I recently converted from remote to tiller. Got it out on the water and runs great for a while but then stops going into reverse. It won't go into reverse at all, there is no grinding, it goes into neutral and forward just fine.

I can take the linkage apart and make a slight adjustment and it will work just fine for a while. I've taken it to the dealership because I was convinced I had not adjusted something properly (even though I read the repair manual over and over and over again). They told me the shift linkage was adjust properly but they were concerned with how stiff the throttle was on the motor. They told me they didn't know where to start troubleshooting.... could be lubrication points, could be something more severe...

Anyone experience this?