Thread: Bravo on SHO

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  1. 07-12-2019, 02:32 PM #1
    FishNChip
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    Bravo on SHO

    Just replaced my Yamaha Vmax series T1 27P with a Bravo 1 25P. Used all the parts in the Flow-Torq II 835274Q1 kit. Have the thrust washer oriented properly as I have read (larger opening towards the lower unit). Attached is a pic of the finished installation. I still need to torque to specs but have it pretty snug. The gap you see between the trailing edge of the lower unit and where the beveled edge starts on the prop is 5.5 mm. Does this seem correct? The Vmax prop was only 2.5 mm. My first time switching out a prop.
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  2. 21XDC
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    #2 07-12-2019, 03:02 PM
    Looks fine If you used all of the right hub parts.

    Marks Props 317-398-9294, 1850 East 225 South, Shelbyville, Indiana 46176 propellerman59@gmail.com http://www.marksprops.com/index.html
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  3. FishNChip
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    #3 07-12-2019, 03:32 PM
    Used all the parts in the kit. Nothing re-used from the original prop setup. Can't wait to try it. Too bad all the news channels are saying I'm about to get Biblical rains. Don't know if the drainage in my garden can handle 40 days and nights!
    Last edited by FishNChip; 07-12-2019 at 03:41 PM.
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  4. magqw7
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    #4 07-12-2019, 04:33 PM
    Looks just like mine, I had to remove the spacer and the washer to get the nut far enough on to get a pin in it though
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  5. FishNChip
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    #5 07-12-2019, 05:41 PM
    Yeah there was a splined spacer (YD-SP) that sat just below the washer/castle nut stack. I removed it.
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  6. mdtritn21
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    #6 07-13-2019, 10:09 AM
    The 25 Bravo is probably too small if you were turning the 27 T1 to top rpm's before.
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  7. FishNChip
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    #7 07-13-2019, 09:11 PM
    Max RPM from the NEMA 2000 link was 5422. Should be at least 5700. Previous owner said he was turning 6200 but ran the same top end speed as me. I think he was running his motor too high on the Atlas hydraulic JP and possibly blowing out. Took his info and calculated prop slip and it was near 25%! My slip was 14%, just about where it should be for a bass boat.
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  8. mdtritn21
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    #8 07-14-2019, 07:25 PM
    It should be alright then
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  9. FishNChip
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    #9 07-21-2019, 12:22 PM
    Finally got to test out the new Bravo. WOT rpms up as much as 500 (5422 - 5925), lost 1mph on top end, and hole shot improved about 25%. Was only expecting a 300 +/- 50 rpm increase going from the 27P Vmax to the 25P Bravo. Read on an offshore racing forum that Bravos for 22P-30P are actually 1" lower than stamped. This is consistent with the numbers I'm seeing. Prop slip dropped to 13%.
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  10. 12many
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    #10 07-25-2019, 09:32 AM
    bravo should also run a lot higher. and maybe less trim. I can set mine stupid high and if I drop trim a bit off max on a long run I pick up speed
    Nitro2023 triton allure 250 proxs
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