Wiring diagram 72-73

[ruppluver]

I need a wiring diagram that shows the wire hookup for the tach. I know that the tach has 3 wires,yellow,white & brown.BUT I need to follow them & see where the wires hook up.You can post it here or send it in an email,BUT maybe some other members would like to see it to.Thanks.

[Rupp Doctor]

Dan,
yellow should be for tac hot from Ign. white ground and Brn. for the light

[ruppluver]

Thanks.Does the yellow hook up to the Mag side of switch? I'm trying to hook up tach to my Polaris wiring harness,it's completely different than Rupp.ALL the wires are in a plug down by the stator,then run through harness to the various places they need to go.By the time the wires get back to switch,there are 2 yellow wires & one red/white wire hooked to switch. There is nothing hooked to the MAG side of switch,completely different than how Rupp does things.Later. Dan

[chrisb7882]

I have also struggled with wiring a tach. I have a Rupp tach with three wires coming out the back, a yellow, a yellow with red tracer and a black for the light. Do i hook the yellow and the yellow with red tracer to the two yellow wires coming from my lighting coil ? I am running a Sachs 290 ss motor. any help would be appreciated. I would love to know what this engine is turning There is only one way to run these sleds WIDE OPEN

Chris

[ruppluver]

Only one yellow wire needs to be hooked up,from the stator.I've never seen a tach on a Sachs single.The way those engines shake,I don't think a tach would last long.

[Rupp Doctor]

Hot wire to lighting coil, all i can say is 1 hot 1 grd,and one has to be for the light

[ruppluver]

I think for now I'll leave the tach unhooked.I have to get the hood done.Thanks.