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Thread: M445 on blackjack 29 v3

  1. #1
    Join Date
    Nov 2009
    Location
    FL
    Posts
    949

    Default M445 on blackjack 29 v3

    Anybody try a m445 on the blackjack on 4s-6s?
    I am upgrading my cooling now using larger id hose and making a pickup using some K&S tubing to cool both the esc and motor seperetly, I did this on another boat and it worked out very good.

  2. #2
    Join Date
    Nov 2009
    Location
    FL
    Posts
    949

    Default

    sorry please move this to the prop site.

  3. #3
    Join Date
    Jul 2016
    Location
    IL
    Posts
    3,054

    Default

    The best prop I ran on 4S was an Octura x642 with an otherwise stock boat and my speed was 41mph. The same prop on 6S ran 50mph. I later switched to an Octura 440/3 and lowered the ESC timing to 7.5* and it ran 60mph consistantly on 6S, albeit at the upper ranges of comfortable running temps. I now run mostly ABC props and something like the 1715 17/45 would work out well with the stock motor. It's similar to an Octura 543 in terms of sizing, but more aggressive.

    I sold that Blackjack to REDLINE1 who installed a dual pick-up rudder and his temps were much better. I've since bought a Miss Geico because I missed the Blackjack and chose to install a through hull pickup in the bottom of the sponson rather than mess with the rudder or add something to the transom. It was a much cleaner installation.

    2017-09-30 14.45.11.jpg2017-09-30 14.45.35.jpg
    Vac-U-Tug Jr (13mph)

  4. #4
    Join Date
    Jun 2017
    Location
    TX
    Posts
    22

    Default

    M445 is a good Octura prop for this setup on 4s. The detongued feature gives a tad more RPM over the X with a compromise in holeshot, in my opinion. However, my max speed was obtained by swapping to the 17 degree rake ABCs.

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