I have a 1971 OMC GM i-4 120 HP, but i am unsure of the model of the drive. my problem is the tilt won't work. It worked one day and not the next. I put in a new tilt motor and replaced a few wires, the solenoids click properly whan the switch is activated, and i have drawn a blank. I am starting to think that the tilt motor is not grounding properly even though it is a two wire motor that should have an internal ground. Any help and or ideas?