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Yamaha fuel management gauge

Old 05-29-2019, 09:40 AM
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Default Yamaha fuel management gauge

Ok I m sure this has been covered but Iím still confused , iím trying to hook up this Yamaha fuel management gauge set up . The main gauge has a coupler which goes to the harness simple enough, and then a yellow wire which Iím assuming goes to key on power, a red wire which goes on to continuous power a black wire which I assume is ground ,a blue wire which Iím not sure where it goes and a green wire which I think goes to speedo and a green and white wire which is not used in a single engine application ,at the other end of the harness a coupler going to fuel flow transmitter simple enough and extra Coupler which goes to a second engine which is not used simple enough, ... and two butt splice connectors ,one has a red and white wire and one has a double black wire neither one do I know where they go .. any help please ?
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Old 05-29-2019, 09:54 AM
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Tried to upload photo I guess it didnít work
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Old 05-29-2019, 09:56 AM
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Try this thread,
Yamaha fuel management wiring
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Old 05-29-2019, 09:56 AM
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Old 05-29-2019, 10:01 AM
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Thanks , I looked at that but just not enough information , doesnít show the two wires at the fuel flow end that I have no clue about
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Old 05-29-2019, 10:01 AM
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I wish I could send this pic I have I think it would clear it up
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Old 05-29-2019, 10:07 AM
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At the gauge and of the harness I have a red wire, yellow wire, black wire, green wire ,green and white wire ,and a blue wire ,Iím not sure which one is ďLĒ, at the rear of the harness near the transmitter I have also two extra wires ,a red and white and a double black wire, I havenít seen anything about those anywhere ..
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Old 05-29-2019, 10:08 AM
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Originally Posted by Seacuda View Post
and two butt splice connectors ,one has a red and white wire and one has a double black wire neither one do I know where they go
Yamaha offers a water-separator filter with a clear bowl a la Racor
which has a water-detection switch.
Those wires connect to the water-detection switch, the gauge can display a warning.
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Old 05-29-2019, 10:10 AM
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Red yellow and black are connect to the regular gauge harness-
always on power, ignition, and ground.

Yamaha uses "L" to symbolize blue wire - it is the gauge backlight,
you can connect it to yellow for always on, or your running light switch.

The green and green/white white connect to tachs -
the gauge has an rpm sync function for twin motors
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Old 05-29-2019, 10:37 AM
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Ok I think I finally understand , thanks everyone 🙏🏻
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