Thanks Thanks:  0
Page 1 of 2 12 LastLast
Results 1 to 10 of 13

Thread: This just might work,,,,,I hope

  1. #1
    Team Member
    Join Date
    Oct 2011
    Posts
    34
    Post Thanks / Like

    Default This just might work,,,,,I hope

    Remember the guy 4 or 5 years ago that put a Honda motorcycle engine in a 3 point hydro and designed a surface drive for it? It's me. Now I've got another brain child to ponder. I have a 9 foot jet ski hull and would be using a Honda civic 4 cly. engine. This is where it gets dicey. I want to drive it with a prop but on a self trimming design. I thought that a prop shaft with a universal joint at the engine and the shaft being mounted to an A shaped arm to allow the shaft to have vertical movement. A spring mounted to the A arm will force it down to 12 or so degrees. When gaining speed a horizontal fin mounted to the shaft tube would force the shaft up to 9 or 10 degrees to allow the prop to break the surface. (surfacing prop needed). The shaft will be over driven by 15 or more percent. Steering will use an outboard mounted rudder. Now that you're done laughing,,,,,I built a bulldozer out of a lawn tractor, and converted a 16 ft outboard boat to V8 stern drive. This sounds doable.
    Those who say it can't be done should stop bothering those that are doing it.

  2. #2
    Team Member
    Join Date
    Aug 2008
    Posts
    2
    Post Thanks / Like

    Default

    I've often wondered how much faster a jetski could be if it had a surface drive. I'd be very interested to see how this project progresses.

    Why self trimming and not a trim system that you control?

  3. #3
    Team Member
    Join Date
    Sep 2008
    Location
    Singapore/Melbourne/Italy
    Posts
    844
    Post Thanks / Like

    Default

    Quote Originally Posted by TNT Teen View Post
    I've often wondered how much faster a jetski could be if it had a surface drive. I'd be very interested to see how this project progresses.

    Why self trimming and not a trim system that you control?
    There was a thread on a guy who ran the shaft out the back and had some F1 props on it, doing over 100mph then he stopped posting...hmmmm

  4. #4
    Team Member
    Join Date
    Oct 2011
    Posts
    34
    Post Thanks / Like

    Default

    Quote Originally Posted by TNT Teen View Post
    I've often wondered how much faster a jetski could be if it had a surface drive. I'd be very interested to see how this project progresses.

    Why self trimming and not a trim system that you control?
    No trim pump, no rams, no extra weight, no thinking.
    Those who say it can't be done should stop bothering those that are doing it.

  5. #5
    Team Member
    Join Date
    Oct 2011
    Posts
    34
    Post Thanks / Like

    Default

    Quote Originally Posted by Powerabout View Post
    There was a thread on a guy who ran the shaft out the back and had some F1 props on it, over doing over 100mph then he stopped posting...hmmmm
    I think I have a picture of that jet ski. He used 2 rudders and a surfacing prop. The engine, I believe was a jet ski engine.
    Those who say it can't be done should stop bothering those that are doing it.

  6. #6
    Team Member
    Join Date
    Feb 2008
    Location
    Oahu, Hawaii
    Posts
    12
    Post Thanks / Like

    Default

    "Those who say it can't be done should stop bothering those that are doing it."

    What a joy to finally see those words in print! I have been aware of the painful frustrations caused by the NAYSAYERS most of my 71 years of life.

    About your idea? Sounds good. GO FOR IT! I'm looking forward to see it's progress.

    I think I saw several videos of the jet ski you are writing about, showing his progress on that project. He was jamming down a river, with a huge rooster tail behind. VERY COOL.

    I have been restricted by some major self inflicted injuries, for the past few years, but I am preparing modify my already modified Sport C tunnel hull. https://www.youtube.com/watch?v=dqtSZBS5HzE http://www.boatracingfacts.com/forum...light=ken+boyd (Ron Hill four blade clever on that.)

    I'm replacing my 1989 70hp Evinrude long shaft fishing engine with a 1976 75hp Johnson Stinger. The steering is going from Teleflex to cable.
    Likes ProHydroRacer liked this post

  7. #7
    Team Member
    Join Date
    Oct 2011
    Posts
    34
    Post Thanks / Like

    Default

    Quote Originally Posted by kenboyd View Post
    "Those who say it can't be done should stop bothering those that are doing it."

    What a joy to finally see those words in print! I have been aware of the painful frustrations caused by the NAYSAYERS most of my 71 years of life.

    About your idea? Sounds good. GO FOR IT! I'm looking forward to see it's progress.

    I think I saw several videos of the jet ski you are writing about, showing his progress on that project. He was jamming down a river, with a huge rooster tail behind. VERY COOL.

    I have been restricted by some major self inflicted injuries, for the past few years, but I am preparing modify my already modified Sport C tunnel hull. https://www.youtube.com/watch?v=dqtSZBS5HzE http://www.boatracingfacts.com/forum...light=ken+boyd (Ron Hill four blade clever on that.)

    I'm replacing my 1989 70hp Evinrude long shaft fishing engine with a 1976 75hp Johnson Stinger. The steering is going from Teleflex to cable.
    It's good to see another master of mayhem (I'm 69) willing to climb in and go! My 11 ft cab over hydro melted the motor too. Couldn't get enough air to it getting on plane. (it was air cooled) I sold it to a couple of young fellas from Maine. I'm still in the cocktail napkin designing stage but I think it will work out OK, I hope.
    Those who say it can't be done should stop bothering those that are doing it.

  8. #8
    Team Member
    Join Date
    Jun 2005
    Location
    Eastern PA
    Posts
    742
    Post Thanks / Like

    Default

    I've seen snowmobile motors used, bolted vertically to a tower, but what I've always wanted to run is a rotary engine, say a Mazda two rotor. OMC messed with them years ago and they were fast.

    Jeff
    "We live at the bottom of an ocean of air." - General Marvage Slatington

  9. #9
    Team Member
    Join Date
    Feb 2018
    Posts
    3
    Post Thanks / Like

    Default

    Well, you can start with these photos..... The first consideration for our Arneson prototype was a secure housing on the transom, for the CV joint that was water proof.

    I don't know if Rik Wimp at Arneson Eng. ( now in Fontana, Ca) knows if a smaller version was ever made? Maybe find a used Borg Warner 'aluminum smallest drive you could modify? My sense is, you want a very small version ... but your idea seems like a fun project.

    If you want HP in a small engine, may I suggest you contact Curt Jordan ( Jordan Engineering - Oceanside, Ca). He knows nearly every motorcycle & snow mobile/ jet ski engine, & how to make power, tune it for your needs & exhaust.
    Attached Images Attached Images   

  10. #10
    Team Member
    Join Date
    Dec 2004
    Location
    Lake Lanier (North of Atlanta, Georgia)
    Posts
    93
    Post Thanks / Like

    Default

    Why not just grossly overpower the PWC with a readily available Mercury V6 outboard engine stuffed under the seat?? You keep the stock jetpump so you only have to invent half the project.

    http://www.greenhulk.net/forums/showthread.php?t=11389
    Attached Images Attached Images  

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Dangerous Work
    By JohnsonM50 in forum Boat Racing Encyclopedia
    Replies: 0
    Last Post: 01-19-2013, 08:12 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •