I recently bought a Teleflex Marine Tach from Cabellas the catalog claimed the it would work with all electric start motors. The problem is that the instructions don't include my motor a 79 Mercury 80 hp with thunderbolt ignition can anyone tell me how to install this tach with my motor? The tach also has setting that are based on how many magnetic poles the alternator has does anyone know how many this motor has?Someone has said that a special tach is required for this motor does anyone know where I can get one?Thanks in advanceDavid
I just put one on my '73 Merc and it went right on the alternator wire hooked to the rectifier. The instructions explained it for mine. Can you get a hold of Teleflex? I checked it with a tester and it was even right on rpm wise.