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  1. #1
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    Any new 300 R on an XB21 yet???

    I am sure someone has to be testing these?

    I am sure the power is great

    The sound seems much better than the opti's


    The bigger diameter sporty seems like a big what if??? But more reliable if it runs.

  2. Member
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    Living the good life on Lake Hartwell, Fair Play, SC
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    #2
    2013 Allison XB-21 BasSport Pro
    2023 Mercury Racing 300R
    Bravo FS 30P
    ProMax 30P

  3. Member
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    #3
    “Sound seems much better than the optis”???

    High performance has always equaled noise. That to me is one of the bonuses

  4. Member
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    #4
    Interested on the lower unit. Not sure how that’s gonna work

  5. Member
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    #5
    My guess is bigger diameter props? But bigger props will setup the extra torque? Making things a wash?

  6. Member
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    #6
    First week of August ;-)

  7. Member
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    #7
    Jealous

  8. Member
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    #8
    Who said the sport master is larger diameter?

  9. Member
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    #9
    All the photos show the 5.44” 400r case and it is electric shift like Verado

  10. Member
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    #10
    Comes electric or mechanical on shift and throttle. I went mechanical. I’m not sure on the sport master diameter. , whatever it is it did great for Paul Nichols on the Bullet.

  11. Member
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    May 2007
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    #11
    You may have a cable shift motor, but the cables only operate an electrical switch. They don't mechanically shift or move the throttle.
    Those who work for a living are being quickly overwhelmed by those who vote for a living.

  12. Member
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    #12
    Quote Originally Posted by TB21 View Post
    Comes electric or mechanical on shift and throttle. I went mechanical. I’m not sure on the sport master diameter. , whatever it is it did great for Paul Nichols on the Bullet.
    Yes it’s exciting

  13. Member fishnfireman's Avatar
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    #13
    Quote Originally Posted by TB21 View Post
    First week of August ;-)

  14. Moderator
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    #14
    Quote Originally Posted by gotboostedvr6 View Post
    You may have a cable shift motor, but the cables only operate an electrical switch. They don't mechanically shift or move the throttle.
    This is correct.

    The unit is the larger one used on the 400R, I was told it was go to be the same size as the 3.0L units originally, not so.

  15. BBC SPONSOR
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    Oct 2006
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    #15
    larger case, water inlets are farther back and allow higher engine heights than a 3.0L sporty

    I am waiting on the higher gears....
    Fastbass Marine LLC
    We specialize in NEW and USED ALLISON BOATS, Blazer Boats, Platinum Mercury Marine Repower Center, AquaTraction Flooring, and custom marine electronic installations on beautiful Kentucky and Barkley Lakes.

    2022 Allison XB-21 BasSport Pro Elite
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