Today is my first time using these forums and i must say being a first time boat owner i have learned alot. I was trying to figure out how to get my tach to work in the force engine forum and saw a posting saying that you might know what to do. what i have is a 20 foot 1987 bayliner with a force 125 outboard. The boat had been neglected and i had to rewire, carpet and upholster it. the dash had been altered and cut out to fit only a fish finder.i dont know what was there before but i removed all that and made a new dash plate with 4 gages, fuel, speed, tach and volts. My tach doesnt work right and reads much higher then it should. I went through the wire schematic and have it wired correctly into the strip on the side of the engine , on the terminal that says tach and has a purple wire going to my rectifier. I read somewhere tonight that it appears i have a 20 pole alternator and its very outdated. They then go on to say that todays systems are a 12 pole and thats why the new tach is all over that place. Is there something i can do to my current tach wiring to get it to work? If not do they even make a tach that works for my boat?