Re: Water temp sender on DT-85 ???
This is what the teleflex sensor looks like on my 87 140. Note the location IS in the water passage and close to the piston/spark plug. I had to grind the teleflex added optional aluminum disc to fit the contour of the angle of the dome head. The sensor tip is tighten against the small diec for good head heat transfer. It was easy install.
The temperature gage is accurate as one could be. Just follow the instructions. If you need help figuring the wiring pm me.
If you note in the pics, their is a small plug that would be adequate for a water pressure gage, I did not want to risk the chance of breakoff of the plug , so I decided on the temperature gage.
http://new.photos.yahoo.com/plsmswain/album/576460762405122196