I have a 12 volt tach that I use on my engine run in stand. I'm thinking that once I am done with the engine breaking for my 914, I will put that tach on the M715.

Will running the wire to the negative coil (as per usual) work for a 12 volt tach, or will it overload somehow. I don't THINK it will, but I am horrible with electric stuff.

Zach