I'm in the process of installing a teleflex cylinder head temp guage and would prefer to screw directly into block as opposed to using a bracket. My ? is if I do so does the end of the sending unit have to contact back of the tapped boss and do I need to put in grease or something to make it pick up the temperature reading more accurately. My tapped hole is 3/8 inch and the sender is 1/8 inch so can I just install a flush brass bushing to adapt. If so the end of the sender may not contact block. Also what guage of wire should I use for sending unit to guage and must it be stranded? My motor is a 1989 Evinrude e40TLCEC and the tapped boss I found is about 4 inches to the left of the upper spark plug. Is this a good place to install?
"Thermal grease (also called thermal gel, thermal compound, thermal paste, heat paste, heat sink paste, heat transfer compound, or heat sink compound) is a fluid substance, originally with properties akin to grease, which increases the thermal conductivity of a thermal interface by compensating for the irregular surfaces of the components. In electronics, it is often used to aid a component's thermal dissipation via a heat sink."
