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Thread: Noisy drive

  1. #1
    Join Date
    Feb 2005
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    Noisy drive

    I noticed a howl coming from the Minx. So I replaced the gimbal bearing . Took it out for a rip The howl is still there. I pulled the drive ran the engine "No noise" Put the spare yoke assembly into the fly wheel and gimbal bearing ran the engine "No Noise" The U joints on the drive seem good , but not sure if I should put my spare yoke assembly on and test it. I suspect the upper gear bearing as the tone changes ever so slightly when I turn the steering wheel. Any ideas?
    machinist ,bore it deeper,ream it bigger, and lap it to a fine finish



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  2. #2
    Join Date
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    Pull the drain plug check for debris and odor.
    No matter what your beliefs are "GOD BLESS AMERICA"

    Fully retired marine tech near 60 years in the biz.

  3. #3
    Join Date
    Feb 2005
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    Thanks Phil. I already drained and replaced the oil. There was the normal amount of metal on the drain plug magnet. I did the U joints to eliminate them as the source. I also added a high shear oil additive. It's a little quieter "on the hose anyway" It's definitely noisy in the upper, I can hear and feel vibration on the cap plate. I guess I'll try replacing the vertical bearing first
    machinist ,bore it deeper,ream it bigger, and lap it to a fine finish



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  4. #4
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    Is the noise always present or only when in gear. if only in gear F and R?

  5. #5
    Join Date
    Feb 2005
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    Yes it's there all the time get's louder with throttle It's a SEI upper. Funny ,"But Not" the Merc lasted 24 yrs the SEI lasted until the warranty ran out
    machinist ,bore it deeper,ream it bigger, and lap it to a fine finish



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