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Acme 1285 vs 1479 -- any experience?

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  • Acme 1285 vs 1479 -- any experience?

    I'm currently running an Acme 1285 on my 05 X2. (Was installed by the PO.) We board and surf but also slalom. I contacted Acme for suggestions on a prop that might lower my RPM's when skiing but still provide low end grunt. They suggested that the 1479 would lower my RPM by a couple hundred. Same diameter and pitch as the 1285 but .150 vs .105 cup. Anyone have experience with the 1479 prop? I'm not sure if it's worth the $$ just for a small change. I do know I could sell my 1285 in a heartbeat.
    "For every complex problem there is an answer that is clear, simple, and wrong." (Henry Louis Mencken)
    2005 X2, Viper Red, MCX, Acme 1285, PPass, rear 750 sacs, KGB, IBS, Bennett Wake Plate
    (previous) 2001 X5, 1991 TriStar 190

  • #2
    What engine is in the boat? EDIT - Just saw the MCX engine. How much ballast do you typically run?
    Eric Johnson
    Johnson Propeller Co., Inc
    OJ PROPS 800-359-9730

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    • #3
      For surfing we run about 1500lbs.
      "For every complex problem there is an answer that is clear, simple, and wrong." (Henry Louis Mencken)
      2005 X2, Viper Red, MCX, Acme 1285, PPass, rear 750 sacs, KGB, IBS, Bennett Wake Plate
      (previous) 2001 X5, 1991 TriStar 190

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      • #4
        To drop the RPM for skiing and still have decent low end while loaded I would suggest our 14.75 X 15.5 LC Splined XMP EDGE 4-blade.
        Eric Johnson
        Johnson Propeller Co., Inc
        OJ PROPS 800-359-9730

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        • #5
          I ran the 1479 for awhile. I have both a 1285 and 1479. Both worked good for surfing 3200-3300 Rpm with alot of ballast. At 12 mph wakeboarding not much difference between them. 1285 had a higher top speed by 3 mph with no weight in the boat. I am running the OJ TZ X-5 right now and I feel it's a better all around prop running Serious weight while surfing and wakeboarding. Fuel economy is up for sure
          Last edited by thamax; 06-21-2013, 02:09 PM. Reason: willyt doesn't like my sentence

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          • #6
            Originally posted by thamax View Post
            I ran the 1479 for awhile I have both a 1285 and 1479 worked good for surfing 3200-3300 Rpm with alot of ballast at 12 mph wakeboarding not much difference the 1285 had a higher top speed by 3 mph with no weight in the boat I am running the OJ TZ X-5 right nowand I feel it's a better prop all around with serious weight and surfing and wakeboarding I know my fuel economy is up for sure
            Your 1285 had a slightly higher top speed than the 1479? That seems to be at odds with what Acme indicated would happen for my boat.
            "For every complex problem there is an answer that is clear, simple, and wrong." (Henry Louis Mencken)
            2005 X2, Viper Red, MCX, Acme 1285, PPass, rear 750 sacs, KGB, IBS, Bennett Wake Plate
            (previous) 2001 X5, 1991 TriStar 190

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            • #7
              Not much I think 43 mph and 40 was spread on them but I need to retest this year when I get a chance I am in a 4300 lb x-star mcx with a hotter cam so like 10-15 hp above stock

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              • #8
                At 4000-5000ft elevation

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                • #9
                  Originally posted by EJ OJPROP View Post
                  To drop the RPM for skiing and still have decent low end while loaded I would suggest our 14.75 X 15.5 LC Splined XMP EDGE 4-blade.
                  Thanks Eric. Any idea what the approx. RPM gain would be at 34 mph running unweighted?
                  "For every complex problem there is an answer that is clear, simple, and wrong." (Henry Louis Mencken)
                  2005 X2, Viper Red, MCX, Acme 1285, PPass, rear 750 sacs, KGB, IBS, Bennett Wake Plate
                  (previous) 2001 X5, 1991 TriStar 190

                  Comment


                  • #10
                    Originally posted by thamax View Post
                    I ran the 1479 for awhile I have both a 1285 and 1479 worked good for surfing 3200-3300 Rpm with alot of ballast at 12 mph wakeboarding not much difference the 1285 had a higher top speed by 3 mph with no weight in the boat I am running the OJ TZ X-5 right nowand I feel it's a better prop all around with serious weight and surfing and wakeboarding I know my fuel economy is up for sure
                    That... Was the longest sentence I have ever read

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                    • #11
                      Don't you know that in the 21st century punctuation is irrelevant (or so it seems.) Communication is evolving . . . back to grunts and gestures.
                      "For every complex problem there is an answer that is clear, simple, and wrong." (Henry Louis Mencken)
                      2005 X2, Viper Red, MCX, Acme 1285, PPass, rear 750 sacs, KGB, IBS, Bennett Wake Plate
                      (previous) 2001 X5, 1991 TriStar 190

                      Comment


                      • #12
                        Interested in your research here, I have known we need to re-prop our X2 from what I assume is the stock 14X20.
                        After surfing all day yesterday with lots of extra ballast, it painfully apparent how much the boat struggles.
                        Seems general consensus is the 1479 is the answer if we don't need 36mph all day to ski

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                        • #13
                          hey ive got a 14.75X15.5 for sale!
                          "if one day the speed kills me, do not cry because i was smiling." -Paul Walker

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                          • #14
                            Originally posted by willyt View Post
                            That... Was the longest sentence I have ever read
                            You should have a look at what we attorneys use to write the whole day long...

                            I'm currently running the OJ 14.75 x 15.5 and it seems to be a good choice. However not too much top speed anymore but, who cares?
                            What a local prop specialist told me today was that lowering rpms is generally spoken not a good idea since every engine has its optimal range of rpms. For the LY6 they write it is between 5200 and 5600 max. So by putting on another prop might cause your engine not running in the optimal range and therefore run under overload even at low rpms. However by having my engine running at 5200 rpms (top speed scenarios) I don't feel too comfortable.

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                            • #15
                              Did you go any further on a prop selection, I have a 1285 on order and was interested in what you found from any of the ideas here.

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