Re: johnson seahorse V4 85hp (1978-80?) tilt trim problem
That 3 wire PTT electric motor has a circuit breaker within it, and it appears that it is taking effect.
If that engine does not have the transom brackets cut away so that the PTT unit can be removed from its location, do the following to avoid removing the engine from the boat.
Manually have the engine in the fully raised position. Now, tie it up and support it securely somehow so that it is impossible for it to drop or move to the port (left) side.
Remove the top retaining pin from the center tilt cylinder. Then lower that tilt cylinder plunger rod.
Remove the large nut from the port side of the steering tube. Remove the three bolts from the port side of the port transom bracket that secure it to the PTT unit. Remove the two nuts that retain the transom bracket to the boat (You may need to tap those bolts in and out of the way). Now, slide the port transom bracket sideways a bit. You can now remove the three starboard PTT retaining bolts and remove the PTT unit.