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  1. 05-18-2025, 10:15 PM #1
    bobby.leejr
    bobby.leejr is offline
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    2015 Mercury 250 Pro XS Rattling Noise

    2015 250 Mercury Pro XS
    Serial # 2B122319

    Water Pressure at Idle: 1.0
    Water Temperature at idle: 119-120

    I can't remember the exact water temperature and pressure but they were in spec.

    I have a 2015 250 Mercury Pro XS that is making a rattling noise from about 3900-4200 RPMs. Adjusting the trim will make it stop. It appears to be worse when the motor is trimmed down and there is more of a load. Does anyone have any idea what this could be? Motor runs very well other than the rattling.

    Video of the noise:
    https://www.youtube.com/shorts/XSqASvIwQ2I

    Video on the muffs:
    https://www.youtube.com/shorts/-WHQLBZRMTg
    Last edited by bobby.leejr; 05-19-2025 at 09:12 PM. Reason: Updated Serial#
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