I have a Force 1994 120HP - would like to add a water temp gauge. The sender is giving me a problem. The only spot I can see is a plastic plug on top near the Thermostat. This opening is a 3/8" hole. Unfortunately I cant find a sender with a 3/8" thread. Went to US boats and the smallest they have is 1/2" sender. First question is do you think this is the right hole. Cant see any other place. Second question would be If its the right hole where could I get a sender that size. Thanks!
