Yamaha fuel management not working

[southernstyle995]

my fuel management system is not working on my boat. it didn't work when I bought it last year. ive been researching how to get it working but
cant find anything. do yall know what I need to do to get it working

 

[seasick]

I assume you are referring to the separate round Command Link Gauge. First step is to make sure you have the fuel flow sensors for both motors. Then make sure the gauge has power. You can tell by watching it when you turn on the ignition. Check all connectors and leads. After that, the trouble shooting gets a bit complicated

 

[SkunkBoat]

On mine one of the flow sensors has a broken wire from a pin in the connector. the cable is too short for me to do anything without removing the sensor. That is a pain because of where it is and the PHILLIPS screws that are holding it in.
It started as an intermittent problem and we would wiggle the cable. You can tell which sensor has a problem by using the button on the gauge. It will read Port/Stbd/Both.

 

[teaklejr]

You could always get the Lowrance nmea engine cables and have all the same info right on chartplotter. Its as simple as running cables from engine harness to a nmea backbone then to chartplotter . Just did it with my HPDI engines.
.

https://www.amazon.com/Lowrance-Yam...terface+Cable&qid=1563810257&s=gateway&sr=8-2

 

[southernstyle995]

Thanks guys, when I get a chance I'll go do some trouble shooting

 

[southernstyle995]

I assume you are referring to the separate round Command Link Gauge. First step is to make sure you have the fuel flow sensors for both motors. Then make sure the gauge has power. You can tell by watching it when you turn on the ignition. Check all connectors and leads. After that, the trouble shooting gets a bit complicated
View attachment 8113View attachment 8113

Yea that's the gauge in referring to. It has power to it just isnt showing the mpg like there is a problem with the flow sensors. Wont be able to work on it till tomorrow but I'll update as soon as I find something

 

[glacierbaze]

When you crank the engine, does it show _ _ or does it show 0.0? The first would indicate no signal from the sender.

 

[southernstyle995]

it shows _ _ what does the sender look like and where would it be?

 

[glacierbaze]

https://www.google.com/search?clien...&ved=0ahUKEwiQy6jumsvjAhVO2FkKHaoPAsoQ4dUDCAY

Should be between the fuel/water separator and the engine. Ideally, one for each engine.

 

[southernstyle995]

https://www.google.com/search?client=firefox-a&rls=org.mozilla:en-USfficial&biw=846&bih=503&tbm=isch&sa=1&ei=DhQ3XZCMHs6w5wKqn4jQDA&q=transducer+fuel+yamaha&oq=transducer+fuel+yamaha&gs_l=img.12...44551.45985..49199...0.0..0.74.407.6......0....1..gws-wiz-img.2dyu0KydYB0&ved=0ahUKEwiQy6jumsvjAhVO2FkKHaoPAsoQ4dUDCAY

Should be between the fuel/water separator and the engine. Ideally, one for each engine.

Okay thanks I think I remember seeing it now just didnt know shat it was at the time

 

[southernstyle995]

Where does the wiring go from the flow sensor? To gauge or to motor?

 

[seasick]

I don't recall if there is a separate harness for fuel flow data or if it ties into the harness from the motors to the gauges. I don't have a rigging diagram for that model year.
I would guess (hope) that there is one harness for the dual installation and it has a connector in the bilge area to connect the sensor wires.

 

[southernstyle995]

I don't recall if there is a separate harness for fuel flow data or if it ties into the harness from the motors to the gauges. I don't have a rigging diagram for that model year.
I would guess (hope) that there is one harness for the dual installation and it has a connector in the bilge area to connect the sensor wires.

On the starboard side there is two connectors under the flow sensor an one connector on the port side. Havnt seen anything or any connections that would not make them work. Maybe both sensors are bad idk

 

[glacierbaze]

Do you have a NMEA network on the boat?

 

[southernstyle995]

I'm not to familiar with the NMEA network stuff. I do have a gamin 7610xsv

 

[glacierbaze]

I was asking because that may be how your sensors are connected to your gauges/display. Also, check your private messages.