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Slipping Mercruiser over 1500 RPM??

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  • #1

    Slipping Mercruiser over 1500 RPM??

    I have a 1985 Mercruiser 120HP. When I go over 1500 RPM the outdrive "slips". I can't tell if it's the prop or the coupler. Inspecting the prop doesn't show any indication that the hub is spun. If I put the boat in forward and turn the prop counter clockwise it does stop and I can't turn it. Any ideas or suggestions. I hate to buy a new prop only to find out the coupler is bad. Thanks
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  • #2
    It is hard to say without seeing it. Could you possibly borrow a prop to try? Otherwise you could take the prop to a prop shop and have them put a new hub in it.

    Tech Support
    Brunswick Corporation is the original equipment manufacturer (OEM). Sterndrive Engineering, Inc. (or SEI) is not affiliated with the Brunswick Corporation and is not authorized to sell or service Brunswick products.

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    • #3
      It was the Prop Hub

      Thanks for your help. It turned out to be the prop hub. Had the prop reconditioned with a new hub and the boat runs great again. Thanks for your help.

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