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  1. #71
    Site Admin Green Hulk's Avatar
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    the new 15/25 is now available. Keep in mind you need to also install a 159mm wear ring. I have both stainless steel and factory wear ring options available in the drop down's when you order the impeller in the GreenHulk Storehttps://www.4-tecperformance.com/ind...oducts_id=9330


    Thank you for your business!
    Jerry


  2. #72

    Join Date
    Jan 2006
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    Taylor, MI 48180
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    So, who purchased one? What are your results?

  3. #73
    NitroFish300's Avatar
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    Sep 2019
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    Quote Originally Posted by Sundance View Post
    The prop Waterforfire posted a couple pages before in this post has been on my 2018 RXTX since new. It was Waterforfire's idea to do a prop--15-22--and send it to Dave to fit by boat. The acceleration is so much better than the stock prop and will run 82 MPH all day in south Texas heat at 8500 RPMs. The only mods to the ski are Riva 8500 tune--the aforementioned prop---intake manifold cleaned out and home made four inch air to the front of the hull located on the port side of the hull. It's been running flawlessly over two years. On my 85th birthday last month hit 8620 RPMs on a cool morning.
    Only held it there for a short burst as no valve spring retainer upgrade.
    thanks for posting that info. Was thinking even with it being 159mm the pitch of 15/25 would be two steep for 100F NE Texas heat and humidity. Just ordered the 15/22R

  4. #74
    Im excited to try this new prop. Ive tried the 13/16 and the 13/18 3 blade sxx-cd. At my normal density altitude it's just not that good of a prop. Takes a 13/16 for me to spin 8300rpm and at that point I can only get 77mph. Maybe the 15/25 will be better suited to the ski. I liked the factory 4 blade better than either of the 3 blades.

  5. #75
    I just noticed Solas is also recommending on their website the 161mm , 3 blade, 14/19 for modified 300s how does this compare with the 15/25. ? And there isn’t any mention of the 15/25 on the Solas website. What gives ?

  6. #76
    Mod less, ride more! troyheb's Avatar
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    Nederland, Texas
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    Quote Originally Posted by Gocman View Post
    I just noticed Solas is also recommending on their website the 161mm , 3 blade, 14/19 for modified 300s how does this compare with the 15/25. ? And there isn’t any mention of the 15/25 on the Solas website. What gives ?
    You cant compare the 2. The 14/19 is a 161mm. The 15/25 is a 159mm.

  7. #77
    Has anyone tried a 4 blade 161mm other than the factory?

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