tach on 150 blackmax

[crazyhunter]

trying to figure out if my tach gauge is bad or if its got a bad wire on the motor? tach worked for a little wile when i bought the boat but the other day i was leaving the ramp and hit about 3k rpm and the tach just droped to 0. not really sure where to start looking. any suggestions?

 

[Laddies]

Re: tach on 150 blackmax

Remove the gray sender wire from the tach the remove the bonnet find the rectifier and the terminal with a gray wire on it, with water to the engine start the engine with a AC volt meter the voltage should be the same at the rectifier end of the gray wire and the end that is disconnected from the tach. If it's not you have a wiring problem if it's not the tach is shot.

 

[crazyhunter]

Re: tach on 150 blackmax

ok thanks ill give that a shot when i get home.