Tachometer transmitting unit for 58' 1976 Yacht Fischer

[witold933252763]

Power to the unit is normal but exit power to the sender is not.
Any suggestion on how to remedy the situation will be greatly appreciated.
Witold

 

[Captain Ralph]

I assume your typing about the tachometer sender on one of the main engines.
Question; is it mounted on the synchronizer box or on the engine?
Those senders are pretty solid devices, most times the mechanical tach cable is loose or failed. Next a bad wire or crimp.
IMO, to the bottom of the list is the sender has failed.

 

[piripucha]

The transmiter has a square shaft thats plastic it may have snaped therefore it will not transmit the electrical signal. Unscrew the unit and take a look. Good luck I hope this helps.

 

[witold933252763]

Problem solved!
By removing the Positive and Negative hookup from the sending unit and cleaning same with sandpaper solve the problem.