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  1. #1
    mjh3ides's Avatar
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    How come no Yami 4-blade impellers?

    I know lots of my Sea Doo buddies like the 4-blades for top speed, although they say there is some sacrifice in acceleration compared to a 3-blade. It seems to me there wouldn't be as much loss in acceleration with the torqier Yamaha engine & it would also help cavitation & hookup. I'm just wondering why no one makes one for the Yami pump.


  2. #2
    Quote Originally Posted by mjh3ides View Post
    I know lots of my Sea Doo buddies like the 4-blades for top speed, although they say there is some sacrifice in acceleration compared to a 3-blade. It seems to me there wouldn't be as much loss in acceleration with the torqier Yamaha engine & it would also help cavitation & hookup. I'm just wondering why no one makes one for the Yami pump.
    very good question Mark.
    I can say tho that going backwards (if that`s the right description) going from a 4 blade to a 3 blade when I had my doo. I had ran a skat 16\21 (3 blade) in the GTXsc and really liked the performance gains from it... otherwise I ran the solas 12\20...

  3. #3
    abracadabra's Avatar
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    What about a six blade Mark? Like bigger diesel jet boats, Julio...

  4. #4
    SHOBiz's Avatar
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    SD 3 Cylinder - 4 blades
    YM 4 Cylinder - 3 blades

    Makes sense

    (Dumbazz moment)

  5. #5
    JD 1's Avatar
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    Quote Originally Posted by mjh3ides View Post
    I know lots of my Sea Doo buddies like the 4-blades for top speed, although they say there is some sacrifice in acceleration compared to a 3-blade. It seems to me there wouldn't be as much loss in acceleration with the torqier Yamaha engine & it would also help cavitation & hookup. I'm just wondering why no one makes one for the Yami pump.
    when using the Seadoo pump on the Yam the 3 blade Seadoo impellers DO NOT perform even close to what the 4 blade does. weird

  6. #6
    Addicted Member 5001craig's Avatar
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    Also, why is the next larger diameter prop a 160? The Dark Side has 158 I believe. I ask as the 160 takes some power to turn.

    Definitely not complaining about what's available, just asking.

  7. #7
    305coco's Avatar
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    Quote Originally Posted by 5001craig View Post
    Also, why is the next larger diameter prop a 160? The Dark Side has 158 I believe. I ask as the 160 takes some power to turn.

    Definitely not complaining about what's available, just asking.
    dave at impros can make your prop and wear ring a 158mm if you like.. the dark side uses 159mm

  8. #8
    RichieFZR's Avatar
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    I have no idea on what prop to run on the JD1 pump kit. Can you point me in the right direction Dan?

  9. #9
    hitman's Avatar
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    Quote Originally Posted by RichieFZR View Post
    I have no idea on what prop to run on the JD1 pump kit. Can you point me in the right direction Dan?
    Best way to get a hold of him is to call him. Are you able to do that? He knows how to get the speed out of the pump setup too. His ski is nuts.

  10. #10
    Site Admin Green Hulk's Avatar
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    Quote Originally Posted by RichieFZR View Post
    I have no idea on what prop to run on the JD1 pump kit. Can you point me in the right direction Dan?
    15/22R with +3 mm pitch added to the trailing edge
    You may or may not have to add pitch to the leading edge too depending on cavitation on take off.

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