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Cabo 43 Prop Size

Discussion in 'Cabo Yacht' started by Ben Cooksey, Feb 11, 2021.

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  1. Ben Cooksey, Feb 11, 2021
    #1
    Ben Cooksey

    Ben Cooksey Member

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    What are the stock size wheels for the 43 Cabo Flybridge with 900 CR MANS? I’ve seen 28x40 28x37.5 and 30x39. After much discussion the 30x39’s performed the best in terms of engine load speed and rpm. Thanks in advance !!
  2. Capt J, Feb 11, 2021
    #2
    Capt J

    Capt J Senior Member

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    It depended on which gears and which props Cabo used (veem, federal, etc.) All of the old boat tests list the prop size and gear reduction.
  3. Ben Cooksey, Feb 11, 2021
    #3
    Ben Cooksey

    Ben Cooksey Member

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    I can’t find the old boat test for the 43, anyone know where to find original equipment information?
  4. Ben Cooksey, Feb 12, 2021
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    Ben Cooksey

    Ben Cooksey Member

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    The 30x39 are Veems, the 28x37.5 are Michigan or Acme not sure which. Talked to Sams they said 30x35 were standard with 900’s. The ZF gear ratio is 1.767 according to Sams for same engine.
  5. Capt J, Feb 12, 2021
    #5
    Capt J

    Capt J Senior Member

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    They would be michigan federal propellers (28x37.5). I've never heard of Cabo using Acme.
  6. Ben Cooksey, May 6, 2021
    #6
    Ben Cooksey

    Ben Cooksey Member

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    Finally got this boat home to AL, thinking about adding 1 degree to the current 28x38 four blade Michigan’s. WOT full fuel/ water 5 persons they spun up to stbd 2365 and port 2370. Running 32 knots. Rated is 2300 and supposedly should get 35kts. Any thoughts?
  7. Capt J, May 6, 2021
    #7
    Capt J

    Capt J Senior Member

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    Leave it alone. Man's run best when slightly underpropped. Man requires a minimum of 2300 rpms but prefers 2350. You won't see anymore speed by adding an inch of pitch and will actually lose speed at cruise (80% load). 43's NEVER ran 35 knots. I was a factory Captain for Cabo and ran many 43's. 32 knots is good for that boat.
  8. CaboFly, May 6, 2021
    #8
    CaboFly

    CaboFly Active Member

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    2350 to 2370 is perfect IMO and where I keep my set up at.
  9. Ben Cooksey, May 7, 2021
    #9
    Ben Cooksey

    Ben Cooksey Member

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    Ok good to know, I’ve talked to a few other 43 owners with different wheels, one had Veem 30x39 from the factory with paperwork. That’s significantly more aggressive wheel. Sam’s said their paperwork indicated 30x35’s from the factory. I don’t have any paperwork on my wheels from the factory, and skip didn’t know what they were. We had a suspicion the owner before skip may have damaged the original wheels. 28x38 four blade are the wheels all the 800 MAN owners have so we’re thinking with 900’s they should be different?
  10. Capt J, May 7, 2021
    #10
    Capt J

    Capt J Senior Member

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    I was the Captain for Cabo that did the week of seatrials with the 2nd set of Man 900 common rails in the United States at the time for MAN. I had Man North America on the boat with the President of MAN N.A., and 2 MAN engineers, and a twin disc engineer for a week straight. Man did a lot of adjusting ALL of the engine parameters in the computer for all of the next motors, to give the engine more acceleration (was a little bit of a dog as programmed as far as acceleration), while balancing black smoke. They wanted to get away from the reputation of blowing tons of black smoke getting on plane of the previous non-cr's. But also needed more acceleration. Anyways, the boat was a brand new 43' Cabo FB with no hardtop/tower, owners gear or anything, just 5 people and wasn't always full of fuel either. Best we ever saw was 33 knots. Afterwards, It then got a tuna tower and ended up in Texas. So you're boat is running perfect, don't screw with it. The CUP is different between your props and the 800's.

    Cabo initially used Michigan Federal props, then switched to Veems later on due to prop burn issues, then when Brunswick acquired Cabo, Brunswick switch back to Federals to save money. Veems are a superior prop.
  11. Ben Cooksey, May 7, 2021
    #11
    Ben Cooksey

    Ben Cooksey Member

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    Ok great info and experience thanks
  12. Ben Cooksey, Jul 17, 2021
    #12
    Ben Cooksey

    Ben Cooksey Member

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    Ran boat for few months now, running great with the wheels thanks for the advice.
  13. Ben Cooksey, Jan 17, 2022
    #13
    Ben Cooksey

    Ben Cooksey Member

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    Does anyone have the Cabo Yachts sea trial sheets for the 43 fly ??
  14. Ben Cooksey, Jan 20, 2022
    #14
    Ben Cooksey

    Ben Cooksey Member

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    Just got it good info

    Attached Files:

  15. CaboFly, Jan 20, 2022
    #15
    CaboFly

    CaboFly Active Member

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    Heck of a Cabo fan to have all those performance reports and brochures in his desk drawer all these years later.
  16. Ben Cooksey, Jan 20, 2022
    #16
    Ben Cooksey

    Ben Cooksey Member

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    Quite a large following for those involved in building, maintenance and ownership of Cabo
  17. CaboFly, Jan 20, 2022
    #17
    CaboFly

    CaboFly Active Member

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    I was just being funny. I posted that pic. :D
  18. Breckster, Nov 4, 2026 at 5:39 AM
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    Breckster

    Breckster Member

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    You mentioned Sam’s said 30x35 from factory with Veem propellers? Wonder if there is any sea trial information with that set-up?

    assuming the larger diameter helped get on plane quicker at the expense of top-end? Wondering if cruise speed would be comparable?
  19. Ben Cooksey, Nov 4, 2026 at 12:46 PM
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    Ben Cooksey

    Ben Cooksey Member

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    They don't have any performance numbers I've only located the sheets from Cabo testing with federal/Michigan wheels. I got quotes for Veem, Acme and Michigan they're all 15-20 k certainly get some advantages from new wheels but maybe 1-2 knots of speed isn't worth it to us
  20. Breckster, Nov 4, 2026 at 4:30 PM
    #20
    Breckster

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    Veem said 28.5 x 35.6 is what they recommended and yes…. 20.5k
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