I normally run my motors with the manual tilt lever in the tilt position so that if hit something under the surface the motor will tilt instead of being rigid. As far as I can tell is with the lever in the run position it just locks the motor to the tilt pin so that in reverse the motor doesn't climb out of the water. Does it matter how I run it? I usually never give it too much gas in reverse so I don't have the motor climbing up.