I installed a Teleflex Tach on My 1980 Mariner 60hp (Model 60EL , Sn 675L305318 outboard, actually commonly known as a Japanese Mariner built by Yamaha). The destructions that came with it said it would work ona Mariner 18, 25, 48, 60 HP through 1983. and gave the settings. I hooked it up and it...