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  1. 06-03-2023, 09:55 AM #1
    Bird-man11
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    2021 250proxs “rattle”

    BC3C19B9-77B9-4B17-BA88-609EE661D195.jpegSerial number: 3B041305

    I am having a “rattle” issue on the backside when coming off of pad and idling. If I give it any kind of gas, the rattle goes away. To me, it makes me think something in the exhaust port is coming lose because it only rattles when I come off plane and water is settling down through the motor. Never rattling on first start up of day. Iv got ~400hrs on the motor, this issue started about 5hrs ago. Anybody ever have this issue or any thoughts on what it could be/seriousness?

    Thank you!
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  2. Pulsare2020
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    #2 06-03-2023, 05:07 PM
    Quote Originally Posted by Bird-man11 View Post
    BC3C19B9-77B9-4B17-BA88-609EE661D195.jpegSerial number: 3B041305

    I am having a “rattle” issue on the backside when coming off of pad and idling. If I give it any kind of gas, the rattle goes away. To me, it makes me think something in the exhaust port is coming lose because it only rattles when I come off plane and water is settling down through the motor. Never rattling on first start up of day. Iv got ~400hrs on the motor, this issue started about 5hrs ago. Anybody ever have this issue or any thoughts on what it could be/seriousness?

    Thank you!
    Does it rattle in neutral? What kind of hub do you have in your prop? Could you be getting "prop rattle"?
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  3. 1BADAIR
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    #3 06-03-2023, 06:48 PM
    I agree . Check the prop/hub
    2011 Ranger z521/2023 250ProXS
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  4. EuropeanAM
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    #4 06-07-2023, 10:08 AM
    Please advise:

    -Does it rattle only in forward, or also in neutral?

    -What type of jackplate (if any) do you have?

    -Have engine and jackplate hardware been re-torqued with a TORQUE wrench to specifications?

    -300 hr Service performed using ALL required components?


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  5. Bird-man11
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    #5 06-16-2023, 04:54 AM
    Quote Originally Posted by EuropeanAM View Post
    Please advise:

    -Does it rattle only in forward, or also in neutral?

    -What type of jackplate (if any) do you have?

    -Have engine and jackplate hardware been re-torqued with a TORQUE wrench to specifications?

    -300 hr Service performed using ALL required components?
    Follow up:

    Only rattled in forward.
    10” bob’s hydraulic plate
    300 service done @ midway marine, Fulton, MS
    Torque wrench always used, appeares prop nut needed re torqued. Rattle gone after tightening.
    Thank you all for the replies!
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  6. EuropeanAM
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    #6 06-20-2023, 06:32 PM
    Gotta love a simple solution!


    Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
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