Fitting a Rev Counter

[MrRob]

My mate has a Blue Band 800 (80hp) he wants to put my old tacho on it. But I dont know if I can hook it up to his engine.
Does anyone know if it can be done and how to do it?

Rob.

 

[Burty]

what rev counter is it dude?

 

[MrRob]

its a mercury one. dont know too much about it but has settings on the back for different poled alternators.

 

[Jon Fuller]

It's pretty simple.
Make sure the selector is set to 12 'pole alternator' on the back of the Tacho, give it +12v and ground where it asks for it, and connect the 'S' (sense) terminal to one of the two wires (I think they're yellow) from the stator where they connect to the rectifier (AC tap, not the rectified side), job done.

 

[MrRob]

How do I identify the 'rectifier' and the 'ac tap' and the 'rectified side' ??

 

[Jon Fuller]

take a few pictures of ya motor, and post em here, we'll see if we can point it out