found a tac now to hook up

cougar1985

Lieutenant Junior Grade
Joined
Oct 7, 2005
Messages
1,023
i was given a tac for my 63 75 hp starflite electshift motor,its the right one for points now im wondering how to hook it up .i do have the wiring diagram though to me its a little hard to properly read ,anybody able to explain how to hook up?
 

jonesg

Admiral
Joined
Feb 22, 2008
Messages
7,198
Re: found a tac now to hook up

If its the same most other tachs, theres 3 terminals. Pos , Neg and signal.
Purple wire from the ignition switch is Pos, Grey should be signal.
If you have other guages you can daisy chain the pos and neg.
 

cougar1985

Lieutenant Junior Grade
Joined
Oct 7, 2005
Messages
1,023
Re: found a tac now to hook up

If its the same most other tachs, theres 3 terminals. Pos , Neg and signal.
Purple wire from the ignition switch is Pos, Grey should be signal.
If you have other guages you can daisy chain the pos and neg.
not the same.has only 2 poles ,im assuming you hook it up basically as you would a old car with points just not postive how to do.well if all else fails read the manual again,lol.this motor has the belt driven mag and external coil.
057-1.jpg
 

Chris1956

Supreme Mariner
Joined
Mar 25, 2004
Messages
28,074
Re: found a tac now to hook up

Connect the tach to the distributor magneto wire and a source of +12VDC, and see if it works. Your motor will provide a 8 cylinder, 4 cycle motor signal.
 

cougar1985

Lieutenant Junior Grade
Joined
Oct 7, 2005
Messages
1,023
Re: found a tac now to hook up

Connect the tach to the distributor magneto wire and a source of +12VDC, and see if it works. Your motor will provide a 8 cylinder, 4 cycle motor signal.
i think the tac has a short, as if i hook it up per the wiring diagram it kills the motor.those tacs are darn near impossible to find.im thinking of going the photo laser route as no wiring is involved and you could read any rotating mass for rpm so would come in handy for all the other motors i have.all i want to do is to make sure im proped properly particuarilly in the over rev dept.
 

jonesg

Admiral
Joined
Feb 22, 2008
Messages
7,198
Re: found a tac now to hook up

tinytac clips to a sparkplug wire, inductive type.
google tinytac.
 
Top