Hi To all: Happy 4th July everyone!!
I am in the process of installing a transducer for my Hummingbird 987C sonar which is a side scan unit. The transducer is large and plastic it measures 3 1/2 X 6 1/2 inches and would require a 1 inch hole for thru hull installation. Since it is plastic and not permissiable on no trailerable boat I made a small box for it and wonder what is the best fluid to use?Mineral oil,pink antifreeze??
Still on the hrad!!! maybe splash before July is over!!