On Jul 8, 8:17*pm, Ted wrote:
Hello,

I have a 1986 Alpha one drive on a Larson boat. *Last year, I
performed the painful job of replacing the gimbal ring after one of
the ears cracked off. *I did the engine removal type replacement.

When assembling things this year, I got stuck when installing the trim
position sensor and trim limit switches. *I know the one labeled (TL)
Trim Limit goes on the Port side and the one labeled (TP) goes on the
Starboard side. *I have a in dash trim gauge, so the TP sensor isn't
just a dummy sensor.

There is a semi-clear plastic disc (about 2" dia) with a hole in the
middle and 2 slots that accept the screws from the switches on the
sides of the gimbal ring. *I only have one of these insulators. *Does
any one know what side it should go on? *I know it insulates the
sensor. *Perhaps I lost the other one or is there just one insulator?
All the online stores with diagrams show the part as 85-63990 and only
on the starboard side.

Many thanks for your help,

Ted

Interesting. I don't have that on either side. Mine are 1990.