So I finally fixed my trim system. I am now somewhat of a junior expert on the 80's Mercury trim system, and probably trim systems in general. Any questions? I am here to help. I managed to put a new two wire motor with assorted adapters included in the kit from Mallory. Including having to track down a plumper O-ring to join the adapter plates and the old trim pump. So far all is well. The trim never worked since I got the boat so I don't even know what it is like to have it. I fixed the motor and ran it with a manual trim setting.