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2018+ XStar prop thread.

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  • #46
    Acme 3289 prop swap

    We installed the 3289 on our 2021 XStar and went out and surfed. Here is what we experienced:

    We carry 1k in lead, 900lbs midship, 100lbs in the nose.
    All tanks full, including fuel and three adults onboard.
    Steep tab settings and 11.3 mph.

    We ran for 3.2 hours, all surf.
    Burned 22.9 gallons of fuel.
    RPMs were 3300-3350 depending on travel direction
    7.15 gph

    Stock prop, same setup and conditions were 3600-3650 burning 9.10 gph.
    Find us on Instagram @Bee_Boss_Surf

    Brynlee 7yrs, Boston 6yrs
    SoulCraft Team Riders



    2020 MC XStar white / Grey (Harley’s)
    2021 MC X22 white/ Kahuna
    2021 MC XStar Red
    2021 MC XT22. Yellow/Silver
    2020 MC XStar Blue
    2020 MC X24. Navy/Silver
    2020 MC XStar Red/Black
    2020 MC XT22 Red/black
    2019 MC XStar Blue/White
    2017 MC XT21 Black/Green
    2001 Calabria Pro V White/Yellow

    Comment


    • #47
      Originally posted by Black ‘n Green View Post
      We installed the 3289 on our 2021 XStar and went out and surfed. Here is what we experienced:

      We carry 1k in lead, 900lbs midship, 100lbs in the nose.
      All tanks full, including fuel and three adults onboard.
      Steep tab settings and 11.3 mph.

      We ran for 3.2 hours, all surf.
      Burned 22.9 gallons of fuel.
      RPMs were 3300-3350 depending on travel direction
      7.15 gph

      Stock prop, same setup and conditions were 3600-3650 burning 9.10 gph.

      Great feedback


      Sent from my iPhone using Tapatalk
      The question is not whether life exists after death, but whether you were alive before death - Osho

      Comment


      • #48
        We also improved our gph with my X22 running this prop.

        Comment


        • #49
          About to order another new prop for the new boat that will be coming in july. Figured I would check back in on this thread and see what everyones thoughts were. Seems the 3289 is still the prop for me and my use.

          I am still up in the air on if I will do the 6.2 again, or if i might opt for the 7.4 just for something different this year. If 7.4, I will probaly go 3289 for sure. If 6.2, I might try the OJ 18x17. If I do, i'll let you all know what I find and post it in this thread. I have a dicom now, so I can probably tell you exactly what the fuel burn difference is.... (If i find time to hook the computer up before and after.)

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          • #50
            By my count there are about 4 different prop recommendations throughout this thread.

            I have only seen real-world data/experience form one - which is the Acme 3289 18x17.5, in which there was reported a reduction of several hundred RPM's, reduction of ~2GPH while surfing, but decreased whole shot- which is deemed acceptable unless maybe you are at high elevation.

            still looking for real world feedback on the:

            OJ 18x15.5 - Variable pitch prop that might lower surf RPM and gain whole shot (magic prop)

            OJ 799-MF - 18x17 - less aggressive than stock prop, but not as drastic of a change as the Acme 3289, so might be a good middle ground for those who run at elevation or heavy wakeboard.

            Acme 3319 - 18x16 (same specs as stock prop) but might lower surf RPM's because of new shape.
            The question is not whether life exists after death, but whether you were alive before death - Osho

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            • #51
              Any real-world experience with Acme 3289 or OJ 799-MF on X24?

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              • #52
                Just ordered an OJ #799 18x17 from Eric for a 2019 Xstar. Will report back on the difference.

                Comment


                • #53
                  Out today- here is data-

                  2018 with 6.2L
                  3 adults in boat
                  100% full ballast
                  600 lbs of lead- 300 each side under tower arms
                  Acme 3319 prop
                  12.2 mph with 60% tab
                  3500-3550 rpm

                  Will check and update tomorrow with slower speeds, but super please. Ran around on the lake at 28.5 mph at 4200 rpm. Will swap to the OJ 899 at some point in the next few weeks and see if what differences that makes.

                  Comment


                  • #54
                    More info

                    Originally posted by coloradox45 View Post
                    Out today- here is data-

                    2018 with 6.2L
                    3 adults in boat
                    100% full ballast
                    600 lbs of lead- 300 each side under tower arms
                    Acme 3319 prop
                    12.2 mph with 60% tab
                    3500-3550 rpm

                    Will check and update tomorrow with slower speeds, but super please. Ran around on the lake at 28.5 mph at 4200 rpm. Will swap to the OJ 899 at some point in the next few weeks and see if what differences that makes.

                    I see you are in the mountains. What was the elevation? Thanks.
                    Find us on Instagram @Bee_Boss_Surf

                    Brynlee 7yrs, Boston 6yrs
                    SoulCraft Team Riders



                    2020 MC XStar white / Grey (Harley’s)
                    2021 MC X22 white/ Kahuna
                    2021 MC XStar Red
                    2021 MC XT22. Yellow/Silver
                    2020 MC XStar Blue
                    2020 MC X24. Navy/Silver
                    2020 MC XStar Red/Black
                    2020 MC XT22 Red/black
                    2019 MC XStar Blue/White
                    2017 MC XT21 Black/Green
                    2001 Calabria Pro V White/Yellow

                    Comment


                    • #55
                      This was all at table Rock lake.

                      Same yesterday. Dropped down to 11.2-11.5 for some foiling sessions and was running about 3250-3350. Hope this helps a touch. Very pleased.

                      Plenty of power also. Full ballast and up to wake speed at 22.5 mph zero issues.

                      Comment


                      • #56
                        Originally posted by Mystic3D View Post
                        Just ordered an OJ #799 18x17 from Eric for a 2019 Xstar. Will report back on the difference.
                        500' MSL
                        2019 XStar
                        changed stock prop OJ 18x16 to OJ 18x17
                        Easy to get on plane with Full Ballast
                        I did not get Surf RPM's as I was Surfing ;-)
                        Gained a few MPH at cruising speed

                        Tip: Eric at OJ sent me a "shouldered" Prop Nut, think basically a washer built into the nut, hope this helps with the prop getting loose.

                        Comment


                        • #57
                          Originally posted by wallnut21 View Post
                          Any real-world experience with Acme 3289 or OJ 799-MF on X24?
                          My 2019 X24 with 6.2L GDI came with an OJ 856-MF 17.5X16.5, 0.12 cup.

                          I picked up an Acme 3493 18x15.5, 0.09 cup and ran it this weekend. I did not do a full test in all scenarios, but it is a rocket out of the hole. I did hit the rev limiter and top speed was 35.4 at 5650 rpms. I cannot remember the exact surf RPM, but I think it was ~ 3500 with full ballast and 14 on the boat.

                          While I love the performance of the 3493, I just placed an order for the Acme 3289 18x17.5 0.105 and should have it next week. I will do some more testing and report all of my findings on all three props (actually never ran the factory OJ).
                          Last edited by Diesel; 06-01-2021, 12:23 PM.
                          05 ProStar 209, Navy Flake, Slate Gray, MCX 1:1 Sold
                          15 X23 7.4 FOR SALE

                          Comment


                          • #58
                            Originally posted by Mystic3D View Post
                            500' MSL
                            2019 XStar
                            changed stock prop OJ 18x16 to OJ 18x17
                            Easy to get on plane with Full Ballast
                            I did not get Surf RPM's as I was Surfing ;-)
                            Gained a few MPH at cruising speed

                            Tip: Eric at OJ sent me a "shouldered" Prop Nut, think basically a washer built into the nut, hope this helps with the prop getting loose.
                            Surf Data: full ballast, 10.8 MPH, 3000 RPM

                            Comment


                            • #59
                              Originally posted by Diesel View Post
                              My 2019 X24 with 6.2L GDI came with an OJ 856-MF 17.5X16.5, 0.12 cup.

                              I picked up an Acme 3493 18x15.5, 0.09 cup and ran it this weekend. I did not do a full test in all scenarios, but it is a rocket out of the hole. I did hit the rev limiter and top speed was 35.4 at 5650 rpms. I cannot remember the exact surf RPM, but I think it was ~ 3500 with full ballast and 14 on the boat.

                              While I love the performance of the 3493, I just placed an order for the Acme 3289 18x17.5 0.105 and should have it next week. I will do some more testing and report all of my findings on all three props (actually never ran the factory OJ).

                              I would love to hear the results on the X24 with 3289 when available. Tks.

                              Comment


                              • #60
                                Originally posted by wallnut21 View Post
                                I would love to hear the results on the X24 with 3289 when available. Tks.
                                Got it on this past weekend and only had a few hours on the boat. Unfortunately it was just a couple of us, and we did not get to surf.

                                But, here are my initial thoughts and data:

                                - Still came out of the hole strong with single tab autolaunch, but I did not have people or weight
                                - 4K cruise speed was 30mph vs 25 for the 3493
                                - WOT at 5650 was 41 vs 35 for the 3493

                                My initial conclusion is that it is a much more versatile prop than the 3493, but I really need to get my normal crew of 10-14 and see how it surfs. More to come.

                                Oh, and I may order the 3319 18X16 0.12 cup. It may be the perfect balance for the x24 with 6.2.
                                05 ProStar 209, Navy Flake, Slate Gray, MCX 1:1 Sold
                                15 X23 7.4 FOR SALE

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