Page 14 of 26 FirstFirst 1234567891011121314151617181920212223242526 LastLast
Results 131 to 140 of 251

Thread: OMC’s 4-Rotor Wankel Racing Engine - The Real Story

  1. #131
    Team Member
    Join Date
    Sep 2008
    Location
    Singapore/Melbourne/Italy
    Posts
    780
    Post Thanks / Like

    Question

    Quote Originally Posted by LIQUID NIRVANA View Post

    The OMC 6hp Prototype Rotary outboard powerheads


    This picture indicates just how much smaller the Rotary powerhead was when compared with a 1971 6hp Johnson/Evinrude or the earlier Johnson/Evinrude 9.5hp

    ================================================== ==============
    How did that carb work mounted sideways?
    ( I dont want to hear it was a rotary so centrifical force kept the fuel in the bowll)

  2. #132
    Team Member
    Join Date
    Nov 2008
    Location
    Horseshoe Bend, ID
    Posts
    657
    Post Thanks / Like

    Default Sideways carb?

    My guess is the engines were tested horizontally in the prototype phase, ans that the image is rotated 90 degrees. The tip is what appears to be a starter pull on the end opposite the flywheel. Might this be a leftover from a snowmobile application that would have the PTO where the flywheel is?

    Tim

  3. #133
    Sam Cullis Mark75H's Avatar
    Join Date
    Nov 2004
    Location
    Annapolis, MD USA
    Posts
    1,795
    Post Thanks / Like

    Default

    I think Tim is right ... look at it this way:

    The wires now seem to be hanging down naturally and the things now at the right appear to be parts bins with nuts and bolts in them
    Attached Images Attached Images  
    Since 1925, about 150 different racing outboards have been made.


  4. #134
    - Skoontz's Avatar
    Join Date
    Apr 2006
    Location
    Encinitas, California
    Posts
    581
    Post Thanks / Like

    Default

    Quote Originally Posted by Tim Kurcz View Post
    My guess is the engines were tested horizontally in the prototype phase, ans that the image is rotated 90 degrees. The tip is what appears to be a starter pull on the end opposite the flywheel. Might this be a leftover from a snowmobile application that would have the PTO where the flywheel is?

    Tim
    I don't know what i am looking at in regards to 6HP powerheads, but I do know that is a belt driven torque converter as used in a snowmobile in the flywheel of the first motor. Are you sure these are outboards and not something that maybe was not intended for Cushman carts or Lawnboy mowers? The taper on op of the flywheel without the clutch is used for a belt as well.....The snowmobiles had fins over the end of the housing.
    Bill Schwab
    Dirty Deck Brewing
    Company

  5. #135
    Burgess/Evinrude F1 V8 Lars Strom's Avatar
    Join Date
    Jan 2008
    Posts
    908
    Post Thanks / Like

    Default

    Quote Originally Posted by Rotary John View Post
    I'm afraid the Charlie Strange's and Charlie Alexander's of the marine world are long gone. Some blame Charlie Strang for the demise of OMC. I guess in todays world ecomony the almighty $ is the most important thing. In my day, we sold in excess of 500K 10/15 hp outboards alone. Now that's the total marine market. I remember when Honda brought out thier 350cc 4 cylinder 4-cycle bike at a retail of $1395.00 I put it next to the OMC 15 hp at a $1295 retail and asked where was the value difference between the two. I also said if OMC didn't address the cost issue head on with vigor, the marine business would die. However, at the time OMC sold out every thing they could make for the model year by years end, starting in Sept. so nobody would listen.
    Thank you Rotary John,

    This is one of the best posts I have ever read.. about the Outboard business
    going south..

    I had exactly the same feeling as an exclusive Evinrude dealer..
    and Waukegan was not listening to the dealers..
    Lars Strom

    Life is good





    Check my own racing history at BRF...http://www.boatracingfacts.com/forum...ead.php?t=6727

    My racing web site SVERA.se....http://svera.se/blogg/paris-6-hours/

  6. #136
    Team Member
    Join Date
    Sep 2008
    Location
    Singapore/Melbourne/Italy
    Posts
    780
    Post Thanks / Like

    Default

    Thanks guys, I think you got it.

    Lars
    I agree, I always asked why they didnt make Jet ski's as they will be big soon after seeing Kawasaki 440's start to turned up to our marina in Oz in the late 70's.
    Both Merc and OMC said there was no market and they will be banned soon?

  7. #137
    Team Member
    Join Date
    Sep 2008
    Location
    Singapore/Melbourne/Italy
    Posts
    780
    Post Thanks / Like

    Default

    My big question to John if he can answer is
    Back in 100 cu days why wasn't a V6 made using 49cu stuff?

  8. #138
    Sam Cullis Mark75H's Avatar
    Join Date
    Nov 2004
    Location
    Annapolis, MD USA
    Posts
    1,795
    Post Thanks / Like

    Default

    Quote Originally Posted by Powerabout View Post
    My big question to John if he can answer is
    Back in 100 cu days why wasn't a V6 made using 49cu stuff?
    I think that would be a better question for Jim Nerstrom
    Since 1925, about 150 different racing outboards have been made.


  9. #139
    Team Member
    Join Date
    May 2009
    Location
    Metter, Ga.
    Posts
    130
    Post Thanks / Like

    Default v-6

    Quote Originally Posted by Powerabout View Post
    My big question to John if he can answer is
    Back in 100 cu days why wasn't a V6 made using 49cu stuff?
    The first showing of the V-6 was at Paris in 1973; Johnnie Sanders won the race with that engine. It was actually made from 100cu V-4 parts with a new block and head castings resulting in 150ci. The crank was actually made from 2 V-4 cranks welded together. OMC got a copy of the Merc V-6 and knew it was a 122cu looper with a 60 degree V. It was a HP race. OMC knew they would get more HP out of 150ci than Merc could from 122. Also the 60 degree V from Merc wouldn't allow a bigger bore, so OMC thought they had won the HP race. Be sides, OMC had all the machinery to machine the V where as the 49ci was inline.

  10. #140
    Team Member
    Join Date
    May 2009
    Location
    Metter, Ga.
    Posts
    130
    Post Thanks / Like

    Default pictures

    Quote Originally Posted by Skoontz View Post
    I don't know what i am looking at in regards to 6HP powerheads, but I do know that is a belt driven torque converter as used in a snowmobile in the flywheel of the first motor. Are you sure these are outboards and not something that maybe was not intended for Cushman carts or Lawnboy mowers? The taper on op of the flywheel without the clutch is used for a belt as well.....The snowmobiles had fins over the end of the housing.
    Guys. The picture of the engine horizontal is correct. It shows the snowmobile engines as they were produced on the assembly line at Evinrude in Milkwauke. The flywheel was one half of varriable sheeve pully used for the drive; an OMC patent. The posting Ken had before with the colored slide shows the prototype 6 HP outboard. It got put in with the snowmobile engine with the wrong orientation that was taged 6 HP outboard.

Thread Information

Users Browsing this Thread

There are currently 3 users browsing this thread. (0 members and 3 guests)

Similar Threads

  1. 2008 Blue Water Resort and Casino 300 Enduro Rules
    By Ron Hill in forum Outboard Racing History
    Replies: 3
    Last Post: 01-20-2009, 01:53 PM

Tags for this Thread

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
  •