What is the 3 pin connection for on these units? I'd love to have a tach but not a clue as the how to's for my 1985 Johnson 30hp. I'm a Steamfitter not a boat techy
If it's the plug under the key there is a harness that plugs into that for the tach. If you can find the harness installing the tach is easy will probabaly need your dealers help or may find it on ebay.
