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    • Cummins Marine Forum Topics
    • What Aftercooler do I have ? MOTA or Serek Designs

      This topic has 0 replies, has 1 voices, and was last updated by 1 year ago

      May 20, 2022 at 5:12 pm Hopefully this will help the boating community as to sorting the new changes in aftercooler design Cummins has come up with.. It used to be easy for me as itĀ  all set in my “memory bank”.. Corey put most of this together and Justin & I added some thoughts.Ā  I am sure this will be a “moving topic” are these newer coolers get a few years of “Marine Age” on them. Now I even have to look at pictures and notes …

      Started by: Tony Athens in: Cummins Marine Engines

      0 Replies - Can you Help? ...be the First to Respond!

    • Popular Q engines— fuel pressure numbers

      This topic has 0 replies, has 1 voices, and was last updated by 1 year ago

      May 12, 2022 at 6:49 am These are the proper running fuel pressure number measured on the filter head on the QSB 5.9, QSC and QSL 9.. Ā  I have not measured th 6.7 yet, but suspect it in the 50-100 PSI range.Ā 

      Started by: Tony Athens in: General Discussion

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    • Tax Payer Hot Rodding

      This topic has 1 reply, has 2 voices, and was last updated byWoo 1 year ago

      April 16, 2022 at 10:13 am This is what you can get for $350K these days when you need a bunch of them Ā  Based on the QSB 5.9 ( 480??) You get 400 Hours and then you send it back yo the “upfitter” in Florida for a complete go-thru redo ( of course on your dime) 2-Speed gear box ( the main case is a Velvet Drive for sure) with a 2-speed tail shaft?Ā Ā  Drives a 36Ft military rib with,Ā  Ā probably w/ twin Mercury racing division out-drivesĀ  The more you look at the…

      Started by: Tony Athens in: General Discussion

      1 Reply
      April 20, 2022 at 6:35 pm Wow Tony, that’s fascinating. They’ve certainly left nothing to the imagination there!

      Last Post by: Woo posted: 1 year ago

    • A different method to “down angle” a gear

      This topic has 1 reply, has 1 voices, and was last updated byTony Athens 4 years ago

      December 24, 2019 at 7:29 am Obviously, “A New Way to Skin a Cat” is still alive and well.. Walters Machine Company did something like this for decades to make their V-drive output shaft operate at 10-20 degrees in relation to the input shaft.. It’s worked for them and kinda put them on the map for many years.. Innovative in the 60’s & 70’s for sure.. Today–More like “adaptive engineering vs. “new engineering & de…

      Started by: Tony Athens in: General Discussion

      1 Reply
      December 24, 2019 at 10:37 am Did some more “looking”.. I was right– For educational purposes.. Check out the web site.. Neat stuff for a ” Man Cave” https://nadascientific.com/technology_education/

      Last Post by: Tony Athens posted: 4 years ago

    • Prop Slippage

      This topic has 5 replies, has 4 voices, and was last updated bySteve Lewis 5 years ago

      March 10, 2019 at 11:41 am I am currently involved in a potential repower project with a Southern Cross 52 that has 1987 Vintage 8V-92 TIā€™s in the 730-735 HP range/ 2300 Rated RPM.. 1.54:1 gears swinging 28ā€ x 25ā€ 4B props (maybe 26ā€ of pitchā€”conflicting email numbers) .. Not sure on any cup but probably has some (it could even have a lot, donā€™t know) .. I am using 50,000 lbs as the weight.. The performance numbers posted are from the owner. And, more or less, they gen…

      Started by: Tony Athens in: General Discussion

      5 Replies
      March 19, 2019 at 5:43 am Rob and Tony, I have an accurate idea of the slippage of our Sea Ray, but only at Cruise RPM. I have not done a full RPM graph of performance. Shame on me I guess. My numbers are within reasonable error with Rob’s around 20kts. I sat towards the back of the class. I was 6′ 4″ in the 8th grade so I got complaints that I was blocking the view of those behind me…………. I have a spread sheet that does th…

      Last Post by: Steve Lewis posted: 5 years ago

    • QSM 535

      This topic has 2 replies, has 2 voices, and was last updated byTony Athens 5 years ago

      November 14, 2018 at 11:33 am And I though I had it all….Boy, I was wrong.. I need a serial number from any QSM11 535.. Anyone out there have one they can share? Thanks, Tony

      Started by: Tony Athens in: General Discussion

      2 Replies
      November 14, 2018 at 7:20 pm I should have figured you’d come thru.. Thanks.. Tony

      Last Post by: Tony Athens posted: 5 years ago

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Viewing 6 topics - 1 through 6 (of 6 total)