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  1. #1
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    Prop question on new v8 250

    What size prop is recommended for the new v8 250 on bass boats. I see the ones at pro choice have 23 fury's on them.

  2. Member
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    #2
    Interested as in this as well! I would think they could utilize a smaller prop given the higher red line. Better hole shot AND still get good top end because the motor spins higher.

  3. Member
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    #3
    It will differ depending on the boat, The Z521L Rangers are being shipped with a 23p Fury 3. Thing heavy 21 foot boat. Lighter hubs will have a taller pitch.
    2018 Z521L 250 PRO XS V8

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    #4
    I'd say count on dropping at least a pitch from what the 2 stroke ran on the same hull. Could be alot of people finding a bravo is quicker than a fury as well

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    #5
    Looks like with all this supposed extra torque the 4 stroke would swing a larger prop







  6. Member
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    #6
    My new Nitro Z21 came in with a 23 fury from the factory. Going pick it up Saturday and test run.

  7. Member 2500's Avatar
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    #7
    I think it will be a 24/25 in the end, but they have tested them and 23 is a overall pitch. I think it the timing curve and the 23 allows for instant holeshot and timing curve allows the midrange and WOT with RPM band. boats got power and with a 1:75 gear its allowing the gear case turn a 23/24 easier without over revs. my 250 Verado Pro turns 6250 WOT on a 26 Bravo FS (Croxton B&B)1:85 gearing, so I feel its the case gearing and whole layout on this V8.
    JEFF MURRAY USMC
    RANGER Z521C & 15 VERADO PRO 250
    DEEP CREEK LURES and ROSE JIGS
    GREENFISH TACKLE and ALX RODS

  8. Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
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    #8
    We also need to remember that for models running the G2-TM gearcase, that case ALONE will account for a decrease in pitch of approximately 1 pitch point (due to substantially lower prop pitch numbers).

    23-24P is definitely a realistic choice on heavier hulls.


    Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
    Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
    Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor

  9. Member
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    #9
    Thanks for the suggestions. I'm gonna repower my Z-9 with one and just trying to get an idea. The 23 fury's are back ordered till 23rd of June. Maybe I can find a 24 pitch. Wonder how a 4 blade fury would do.

  10. Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
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    #10
    Should do very well.


    Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
    Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
    Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor

  11. Nitro Boats Moderator BMCD's Avatar
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    #11
    I think this is to get the RPMs above 6k. A 23p is just as fast as a 24p if u can turn it 200+ more RPMs.
    Bryan McDonough
    2023 Nitro Z21 XL
    Nitro Team

  12. Member
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    #12
    Quote Originally Posted by BMCD View Post
    I think this is to get the RPMs above 6k. A 23p is just as fast as a 24p if u can turn it 200+ more RPMs.
    This was exactly what I was thinking. Plus then you get the benefit of a better hole shot.

  13. Member ragtopped's Avatar
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    #13
    I am in the process of repowering my Triton TR20X with a 225 Pro XS four stroke. I was wondering what prop to use. I want a Fury 4. I have a 25p Fury 3. My motor won’t be in for a couple weeks.
    05 Triton TR20X 225 Optimax

  14. Member
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    #14
    Quote Originally Posted by EuropeanAM View Post
    We also need to remember that for models running the G2-TM gearcase, that case ALONE will account for a decrease in pitch of approximately 1 pitch point (due to substantially lower prop pitch numbers).

    23-24P is definitely a realistic choice on heavier hulls.
    can you clarify why the G2-TM would account for a lower pitch? I’m not clear what the substantially lower prop pitch numbers means?

  15. Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
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    #15
    Prior to the G2-TM, prop slip numbers "below 8.0" were pretty rare. I've seen well documented cases MANY times with prop slip in the 6's (with previous gearcases, that would not even be believable).

    Lower slip numbers mean higher load (due to higher efficiency). Hence a lower pitch of 1 point is usually necessary JUST due to the G2-TM case geometry.


    Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
    Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
    Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor

  16. Member
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    #16
    Quote Originally Posted by EuropeanAM View Post
    Prior to the G2-TM, prop slip numbers "below 8.0" were pretty rare. I've seen well documented cases MANY times with prop slip in the 6's (with previous gearcases, that would not even be believable).

    Lower slip numbers mean higher load (due to higher efficiency). Hence a lower pitch of 1 point is usually necessary JUST due to the G2-TM case geometry.
    Ah, prop “slip” numbers. That makes sense. Thx

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    #17
    Quote Originally Posted by EuropeanAM View Post
    Should do very well.
    Don,

    What pitch fury 4 would be recommended? Motor is a 225 on a Phoenix 919

  18. Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
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    #18
    Quote Originally Posted by KPFishing View Post
    Don,

    What pitch fury 4 would be recommended? Motor is a 225 on a Phoenix 919
    Just not enough info there to wager a starting-guess by. Good idea to open a separate thread and provide as much relevant info as possible (examples of what's REQUIRED and what's HELPFUL are provided in the Forum Announcements).


    Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
    Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
    Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor

  19. Member
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    #19
    Good info there on the G2-TM case !!! I just calculated my 2018 Eyra to be 3.87% slip ! 2 people/half load of fuel/ full of gear, 79.5gps mph (both directions) with 26p Fury 3 @5880rpm. Engine is a July 2017 mfg date ProXS 250 w/Smartcraft gauges, w/1.75 gearcase. At 5880rpm/1.75 ratio and 26p prop the 'theoretical' speed with 0 slip is 82.7mph. So, 1.0-(actual speed of 79.5/theoretical speed of 82.7= .0387 or 3.87% slip !!!!
    2020 BassCat Eyra w/Merc v8 Pro XS (2b685615)
    2008 Triton TR196 w/Merc200 (1B505505)
    2024 Havoc Alum Duck boat w/ Mod Mercury 3-cyl 2-stroke
    0T899507 w/1B728726 powerhead (sleeved/ported/welded chambers, mod carbs/tuner &light flywheel)
    Previously owned:
    2018 Eyra w/Merc250 (2b525704)
    2015 PII w/Merc200 (2b115304)
    Brooks tunnel w/Merc 200 carb & CLE l/u motor (A913415)

  20. Member
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    #20
    Quote Originally Posted by FastCat04 View Post
    Good info there on the G2-TM case !!! I just calculated my 2018 Eyra to be 3.87% slip ! 2 people/half load of fuel/ full of gear, 79.5gps mph (both directions) with 26p Fury 3 @5880rpm. Engine is a July 2017 mfg date ProXS 250 w/Smartcraft gauges, w/1.75 gearcase. At 5880rpm/1.75 ratio and 26p prop the 'theoretical' speed with 0 slip is 82.7mph. So, 1.0-(actual speed of 79.5/theoretical speed of 82.7= .0387 or 3.87% slip !!!!
    More like 7 because you have to add a pitch when calculating a fury but still very good numbers

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