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703 wiring to yamaha 50hp

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  • 703 wiring to yamaha 50hp

    can anyone help wiring a 703 control box to a 87 50hp. There is a jumper cable that came with it but I can make sense to what goes were.

    Additionally theres three wires at the ignition box on the motor......

    please help

  • #2
    There are different models of a 703 control box, If it is the one for that engine then it should have a 10 pin harness that would plug direct to engine harness( 10 pin harness is for power trim and tilt models, 7 pin harness for non PT&T models)There is a short harness at control box(red,green,yellow,black wire)to wire up gauges

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