Tachometer

[2botes4fun]

Anybody know the color code of the wire for a tach from a 70ETLH Yamaha OB? Maybe its called by a different name? Pulser coil? lighting coil?
I have tha manual to this thing, but it doesn't state 'Tachometer' by name...got a feeling the answer is right in front of me...bu can't see the forest from the trees! But, it IS saturday & college football is on!

Pls advise. & Tks.

[99yam40]

What kind of controls do you have?
Probably the green wire hanging loose coming out of the con*****er will be for the tach.
Should be with a red , black, and yellow wire

[boscoe99]

Green is the wire colour for the tachometer signal. It comes from the CDI. The computer. The brains of the motor.

The SM will generally say nothing about the tachometer.

[99yam40]

being a 87 70 hp would not the signal be coming from the lighting coil instead of the CDI?

[2botes4fun]

Ok, the matching com=ntrller for the OB has the G, Y & R wires coming out of it. The yellow is connected to a corresponding yellow; Green to a Grey wire which leads to the 'SIG' connection on the Tach; red is not connected to anything.
The issue @ hand is I do not believe I'm getting a proper reading from the motor like I did prior to its rebuild. yeah, new info.
All connections are appropriate to the pics I took & the manual.
From what device does the motor send the signal to the Tach?
Again, tks for any help.

[boscoe99]

being a 87 70 hp would not the signal be coming from the lighting coil instead of the CDI?

Possibly. I shall check.

[boscoe99]

Yes, on that model the green wire for the tachometer comes directly from the lighting coil.

Good catch yam99.

[2botes4fun]

Tk u gents....since I entered my last request, I see the same.
I believe I have a bad tachometer....no way I can be doing 4k RPM AND under 5 MPH @ the same time!!
Looks like I have more spending to do!

[99yam40]

make sure the tach is set to the proper setting for your motor