A newbie here . I replaced my 1998 50 hp Force outboard with a 2003 90 hp mercury outboard . My tachometer now does not work . Not even a bump . Have not had a chance to check my tach setting being it is a pontoon boat with an enclosed console and little harder to get to . Was thinking I should at least get a blip or bump on the tach even if not set right . Any advice on what wires I might check at the engine just in case ?