Recently I purchased two 2003 225 Yamaha four stroke outboards. Some of the wiring is obvious because the connectors are well matched. However, there are some wires that it is not clear where they go. I have four gauges -- two tach, digital fuel management, and digital multi-function speedometer. I need a wiring diagram showing where the wires go from each gauge. Thank you. WED
its all plug and play. however you need to mount the speedometer and the fuel management within 10 inches and both should be on the same keyswitch. the only funny thing is the green and greenwhite leads from the FMM. the green goes to the stbd tach green lead and the greenwhite to the port tach lead.the white lead on the speedometer is for fuel send. the 04 or 05 marine tech guides are about a good a diagram as your gonna get.
Need wiring diagram for Yamaha control gauges
the green goes to the stbd tach green lead and the greenwhite to the port tach lead.
Linear Mode
