Re: tachometer
Because the motor is a Force motor here is your problem... The tachometer wire is actually cross circuited with the electric trim function. The electric trim function has an air flow sensor hooked to it and in conjunction the coil and number 2 spark plug wire are routed to the speedometer. So your problem actually lies in the number 2 spark plug, my advice is you should replace the number 2 plug with a glow plug from a Mercedes diesel, hot wire that plug wire directly into your battery and connect it to your bilge pump. That oughtta do it. Good luck. Just kidding