Topic: tach on vanguard

[Nicks]

Ok im running a 3 in automotive tach on my mower,where do u hook up the main tach wire for rpms on the engine? I have everything else right just need the main wire hooked up

[shadetreemechanic]

The green wire on the tach should hook to the negative side of your coil which a the kill wire on the coil I hope this helps

[Nicks]

Well i hooked up the green wire on the tach to the tab on the blower housing that u hook up the kill teether to and still getting nothing out of the tach,i have power to the tach and lights but no movement on rpms

Suggestions

[Tom Price]

Correct me if I'm wrong but an automotive tach will not work unless it is the Equuis brand that clips in the plug wire.


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[Nicks]

Really???

[shadetreemechanic]

My buddies have used them before on mudder mowers and the way we hooked them up was hook the green wire from the tach to the kill side of your coil and presto you have a tach. That's how I always hooked them up the usually read within a couple hundred Rpms

[Nicks]

Ya thats exactly how i have it hooked up,all my grounds are right and the light is on but no ones home lol,i hooked up the green wire by its self on the coil tab on the blower housing and ive hooked  it up with the green wire and the kill teether wire tied together and still nothing!! Could it be a faulty tach???

[shadetreemechanic]

Anything is possible like I said I seen literally a dozen or more of these automotive tachs on mower engines and they all worked it could be a faulty tach.
Just a thought is your vanguard a v twin? If so you might try tying both coil kill wires together and hooking the tach to them if that don't work it probably is a faulty tach.

[Nicks]

Yes it is a vtwin 16 hp and both coil wires are connected together and come out as one wire on the blower housing,i have an extra older tach im gunna wire it up to see if that one works,do i have to hook up all the wires again to try it or can i just do the green wire or no?

[shadetreemechanic]

Just hook power to it ground it and wire the green wire and you should be ready. Like I said we never had any problem with them I hope this helps

[Nicks]

Ok i will try both tachs again thank u!!

[crazycraftsman]

Auto meter jr. Dragster tac works ,meant for Briggs motors.I tryed atleast 6 different automotive tacs and never worked right.

[GRUBDIGGER]

Auto meter jr. Dragster tac works ,meant for Briggs motors.I tryed atleast 6 different automotive tacs and never worked right.

AMEN!

[Nicks]

Just to be sure so i know,what side is the hot side of the coils on the vanguard vtwin?? To hook up the tach im trying

[shadetreemechanic]

The wire on the bottom of the coil is the wire you tie the green wire from the tach into