I am working on my power trim unit on my 77 merc 175, motor is bad, but I was going through the wiring and I have found on the bottom of the actual pump assembly a round device with a single hot lead going to it. I dont know what this thing is. It is about 1 1/4inch diameter by three inches long. It screws directly into the pump and looks like some type of limit. Does anone know what this is and where I can get a new one. Thanks for your help in advance.
