The Yamaha Fuel Management gauge will accept NMEA data and use it calculate the fuel consumption rate. There are a number of posts on here about how to connect and set the switchs.
There is a Yamaha "harness" required --
Here is data I save from that post---I can't find the Yamaha document that shows the switch settings and a picture of it all right now You will have one pigtail out of the back of the gauge, there will be a s-video connector, a molex (plastic connector) and individual butt connectors for (red)12V,
(black) two grounds,
(blue) instrument lighting,
(white) fuel sender +, and
(yellow) ignition switch 12V. Plug the molex connector into your harness going back to your FM sender. Remove the little black connector (s-video). Trim back the covering, you will see a red, black and white wires, plus a shield. I snipped the red and black wires back, taped them up and forgot about them. Tie your white wire (only) into your NMEA + (data out) wire of your GPS.
Pop the protective plug covering the dip switches off the bottom of the guage, set dip switch number 5 to the up postion. The Yamaha Fuel Management Gauge kit is compatible with any engine.
Similar to using a Flo-Scan system with any engine. The Yamaha FM gauge has bullet connectors for connecting up to a Yamaha wire harness, but those can be cut off and crimp on whatever type of wire connectors you would need to match up with your existing helm wiring. There are only 4*wires that are needed to be connected.[*]Black....... Battery Negative[*]Yellow......Key on positive battery power[*]Red..........Constant positive battery power[*]Blue.........Instrument light circuit[*]Green........only needed if installed with twin engines**
tach input #1[*]Green with white stripe.........
Tach#2 input used for twin engine synchro[*]GPS Nema Input for MPG calculations[/list] Then you install the sender into the outgoing side of your boat mounted fuel filter and run the supplied FM harness from it to the back of the FM gauge. Pretty simple. Yamaha just came out with*this new (see pic)*Multifunction Speedometer and Fuel Management combined into one gauge. These are really nice because when you connect your GPS input it will display GPS speed instead of output tube speed. This gauge is only $40.00 or so more then the stand-alone FM kit. If you are tight for dash board space and have a speedo installed either unit will drop right in that hole. |