I am in the process of installing a new jack plate and I have concerns about sufficient cooling if I jack the plate too high. I know how to watch the tach. as well as listen/feel for slight cavitation but I'd just don't feel I can be too safe. Anyhow after a little research I figured before I put the tools away, I'd get a water temp. guage and sender for my 50 Merc (50ELPTO). I can find Teleflex guages and sending units for V-6 motors everywhere but nothing made specifically for my 3cyl. Does anyone else have experience in what I'm trying to do and/or know how and where to find/install/rig a sending unit? Thanks.