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    Help with temp gauge on 300 Promax

    My boat had 260s on it originally and I replaced them with 1999 300 promax motors. The harness from the 260s had a separate tan wire coming out of it that connected to the temp sensor on the motor. When i hung the promaxs their is a tan wire near the harness that I connected. See attached pictures of how it is currently setup. My temp gauges are not working currently. Do I need to connect directly to the temp sensor on the head with the hardness wire or should I get another temp sensor for the other head like the link below to run the gauge? Thank You!

    Temp Sensor Mercury 135-250HP 3.0L EFI 2000-2010 13536A13 | eBay
    Attached Thumbnails Attached Thumbnails Tan Wire 2.jpg   Tan Wire 1.jpg  

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