Thread: 9.9 HP ??

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  1. #1
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    9.9 HP ??

    Need to purchase a 9.9 HP motor for a aluminum boat. I was told that an upgrade (not sure what part) to the 9.9 Suzuki can increase the HP. Can anyone enlighten me if this is true and what part would be necessary.

    Thanks

  2. Member
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    Paducah, KY and Palm Bay, FL
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    #2
    Research this carefully with your Suzuki dealer. The small outboards no longer seem to share the same block as they used to. Back in the day, a simple advance plate switch would bring a 9.9 up to an 18. A quick look at the new Tohatsu motors seems to show the 9.9, 15, and 20 hp motors sharing the same 20 cu in block. This would seem to indicate some creative possibilities. Check with your dealer.

    EDIT: I just double checked and the Suzuki 9.9. 15, and 20 do share the same 20-inch block...so maybe you can upgrade. I bet a new ECU is required. Could be expensive.
    Last edited by csurp; 04-24-2021 at 12:32 PM.

  3. Member
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    #3
    Thanks for the info I will check

  4. Member
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    Jul 2020
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    Illinois
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    #4
    It's around 400 bucks to upgrade from 9.9 to 20hp