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2004 Yamaha F90 Motor Mount Rust

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  • 2004 Yamaha F90 Motor Mount Rust

    I have been looking to purchase a used outboard for a while and found a used 2004 F90 with low hours that runs great. Only problem I have found is that the motor mount bolts are extremely corroded. Attached is a picture. I've read that replacing these is very labor intensive. How can I check the integrity of these bolts and know if they would need to be changed? Any suggestions to maximize the use of these bolts? Any help is greatly appreciated.

  • #2
    Post better picks

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    • #3

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      • #4
        Excellent high def photos.
        IMO, its nothing to worry about:

        the motor is not going to "fall off",
        that bolt can't "back out" - its captured by the design of the assembly
        and you'd have to beat it out anyway, to replace it)

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        • #5
          They do rust. Looks like someone has added a new nut to an old bolt. I would be concerned about how that was done. I would prefer to have the old nut left in place and then make a determination.

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          • #6
            Thank you!

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