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marine engines

Discussion in 'The Hokey Ass Message Board' started by stainlesssteelrat, Mar 16, 2011.

  1. stainlesssteelrat
    Joined: Nov 23, 2010
    Posts: 583

    stainlesssteelrat
    Member
    from ms

    wondering how many of you have converted them to power your rods and bikes?

    i was thinking of using a johnson outboard 4 cyl for my bobber project.
    or would there be a better one?
     
  2. Why don't you put the imaginary crossfiring experimental engine you
    had in your imaginary project?:confused:
    You know the one!:rolleyes:
     

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  3. boldventure
    Joined: Mar 7, 2008
    Posts: 1,766

    boldventure
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  4. 53sled
    Joined: Jul 5, 2005
    Posts: 5,819

    53sled
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    from KCMO

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  5. stainlesssteelrat
    Joined: Nov 23, 2010
    Posts: 583

    stainlesssteelrat
    Member
    from ms

    I was thinking a 115hp V4 Mercury Mariner mounted sideways to a Harley divorced transmission. Ought to fit her with some hacking and lengthening. right now she has a suzuki 650cc single cyl.
    [​IMG] #1
    [​IMG] #2
    [​IMG] #3
     
  6. SUHRsc
    Joined: Sep 27, 2005
    Posts: 5,078

    SUHRsc
    Member

    Evinrude 2cycle V4 in a midget
    [​IMG]
     
    Last edited: Mar 17, 2011
  7. stainlesssteelrat
    Joined: Nov 23, 2010
    Posts: 583

    stainlesssteelrat
    Member
    from ms

    i like how their responce is, it's instant, no hesitation and MAN do they get to some crazy rpms.
     
  8. retro54
    Joined: Apr 1, 2004
    Posts: 736

    retro54
    Member
    from PA

    A 1959 Evinrude Starflite V4 most likely, with a factory 70.7 cubic inches of displacement, producing 50 horsepower at 4000 RPM...

    In 1960 displacement was increased to 89.5 cubic inches and 75 HP at 4500 RPM



     

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  9. aerorocket
    Joined: Oct 25, 2007
    Posts: 488

    aerorocket
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    from N.E. P.A.


    They sound like they are reving higher than they are because they are 2 stroke engines. A stock 140 V-4 OMC will turn around 6000, the racing V-4 strangler was good for around 7500+. The motor is run with the crank in the verticle position so if you want to run it horizontally you will have to either adapt dowm draft carbs or configure a different intake to run the stock side draft carbs. A better choice would be an injected 2.5 V -6 merc. The powerhead weighs around 160# complete and they make anywhere from 200 to 350hp depending on the state of tune. The 250 hp ones can be found somewhat inexpensively but expect to pay an arm an a leg for a drag powerhead. Because they are injected they can be run in any position, I was told of one that was in an autocross car that was having crank problems. [hearsay] Performance parts, pistons etc. for the hot motors are astronomically priced.
     
    Last edited: Mar 17, 2011
  10. Ned Ludd
    Joined: May 15, 2009
    Posts: 3,953

    Ned Ludd
    Member

    Many years ago I had an idea for a 2-stroke V6 from an outboard in a motorbike. The idea was to keep the crank vertical, but I can't remember how I thought to get the drive into a more usable direction.

    If the drive thing can be solved I think the vertical-crank layout might have a lot of potential in a motorbike, because it allows you to do an air-cooled V6 or V8 with all the cylinders getting cooling air, and it keeps the bike narrow where you want it to be narrow. I'd be thinking 4-stroke there, though, and reverse-flow i.e. carbs on the outside, exhausts down the vee.
     
  11. My 454 "WAS" a 330 horse Crusader Marine engine when I got it.
     
  12. stainlesssteelrat
    Joined: Nov 23, 2010
    Posts: 583

    stainlesssteelrat
    Member
    from ms

    same way they get the power to the prop, worm drive, just make it much shorter, the go from the worm drive to a divorced tranny and belt or chain drive to the rear. or you can do it like the old snapper mowers do with a friction drive plate
     
  13. Ned Ludd
    Joined: May 15, 2009
    Posts: 3,953

    Ned Ludd
    Member

    But the ratio on the worm drive is, what, 4:1-ish? You'd have to step back up to the gearbox, with a chain/belt/gear-train.

    The same problem arises when you want to run a non-unit, chain-drive bike gearbox behind a car engine in a bike. Best I've come up with involves a 2.5-odd:1 ring and pinion behind the engine, driving the clutch and gearbox via a chain with an appropriate ratio to get the gearbox input in the right rpm range. The tricky bit is getting the whole thing compact enough.
     
  14. Tom S. in Tn.
    Joined: Jan 16, 2011
    Posts: 1,108

    Tom S. in Tn.
    Member

    laff your a** off if you want, but a college professor I had back in 80' used a stripped down outboard motor with some kind of radiator in a home made helicopter project he had. I recall him bringing photos one day of his progress.
    He said there were no small light weight 2 cycle engines other than outboard marine suitable for something like a small aircraft. That was 1980, so I suppose he was probably correct for that time.
    Tom S. in Tn.
     
  15. aerorocket
    Joined: Oct 25, 2007
    Posts: 488

    aerorocket
    Member
    from N.E. P.A.


    Outboards do not use worm drive they use a ring and pinion. V-4 OMC outboards use a 2:1 ratio some high performance outboards use as high as 1.5:1.: some direct drive racing lower units are 1:1. To me it makes much more sense to use a fuel injected outboard in the horizontal position and eliminate the 90 degree gearbox.
     
  16. David Chandler
    Joined: Jan 27, 2007
    Posts: 1,101

    David Chandler
    Member

    How about snowmobile engines? They have horizontal crankshafts as far as I know.
     
  17. stainlesssteelrat
    Joined: Nov 23, 2010
    Posts: 583

    stainlesssteelrat
    Member
    from ms

    well you could always take a page from corvair and belt drive it with odd angle pullys to a horizontal tranny.

    or cut up, shorten and mod a small rearend, like a golfcart rearend and hook
    the engien to the rearend and hook the output shaft of the rearend that's left to a tranny and that to the rear..
    all very odd. but would look amazing.
     
  18. Adam Bahm
    Joined: Nov 12, 2008
    Posts: 27

    Adam Bahm
    Member

    OMC used their V4,88 hp powerhead in an out drive, and therefore it was set up for horizontal shaft operation. I was going to use one in a BD5. now I'd like to find a old Saab to stick it in.
     
  19. stainlesssteelrat
    Joined: Nov 23, 2010
    Posts: 583

    stainlesssteelrat
    Member
    from ms

    didn't saab have a tiny 2 stroke in some of it's cars?
     
  20. Ned Ludd
    Joined: May 15, 2009
    Posts: 3,953

    Ned Ludd
    Member

    That's useful to know. Right-angle drives with a 1:1 ratio are really hard to come by. Industrial units, if they're rated for the sort of power and torque one is looking at, tend to be bigger and heavier than the engine :eek: It must be about how they're rated, but in the absence of any knowledge about that, I've got no way of knowing if, say, a 40hp-rated box will handle a peak of 300bhp.

    As soon as one thinks car engines and bike architecture at the same time, one will probably develop a need for a stout 1:1 right-angle drive somewhere.
     
  21. tubman
    Joined: May 16, 2007
    Posts: 4,861

    tubman
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    Since we're getting crazy, how's about a Sea-Doo pwc engine? 230 HP Supercharged! Lots of 150hp+ snowmobile engines too!:D
     
  22. stainlesssteelrat
    Joined: Nov 23, 2010
    Posts: 583

    stainlesssteelrat
    Member
    from ms

    how's using a V4 marine outboard engine crazy?

    i'm thinking if mounted horzontal , sideways with a chain or belt to a divorced tranny it'd look pretty damn good.

    or mayhaps inline mated with a small outomatic out of a VW golf or something like that to a shaft drive rearend. with wrapped zoomies a tripower and witewall tires it'd look evil.
     
  23. SixFive
    Joined: Aug 19, 2004
    Posts: 183

    SixFive
    Member

    So you want the HAMB to help you put a boat engine in your motorbike? Riiiiiight.

    Shit is just getting ridiculous now.
     
  24. stainlesssteelrat
    Joined: Nov 23, 2010
    Posts: 583

    stainlesssteelrat
    Member
    from ms

    not help, just if anyone's done it or has any ideas.

    a sounding board of sorts. ya dig?
     
  25. SixFive
    Joined: Aug 19, 2004
    Posts: 183

    SixFive
    Member

    You get what I'm trying to say right? 2-stroke Boat motors and VW golf transmissions?

    What the fuck does this have to do with period, traditional Hot Rods or Customs?
     
  26. Ned Ludd
    Joined: May 15, 2009
    Posts: 3,953

    Ned Ludd
    Member

    It might be edging OT, but I think it's right in the hot-rod mind-set of adapting stuff to applications way outside the original intention. And there's been none of the modern reversion to bodging things right with electronics: all good, mid-20th century mechanical thinking.

    stainlesssteelrat, I think you'll run up against the same problem one always does when turning a transverse fwd gearbox longitudinal, namely that your output speed is about a quarter of what you want, and your output torque is about four times what you want. Rather try a CX500 or BMW 'box?
     
  27. Ebbsspeed
    Joined: Nov 11, 2005
    Posts: 4,937

    Ebbsspeed
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    You'd be hard pressed to find an air cooled V6 or V8, unless there's something available in aircraft that I don't know about.
     
  28. mustangsix
    Joined: Mar 7, 2005
    Posts: 1,296

    mustangsix
    Member

    Tatra - air cooled, Hemi head, V8....OK, it's a little weird.
     
  29. Ned Ludd
    Joined: May 15, 2009
    Posts: 3,953

    Ned Ludd
    Member

    I was thinking in terms of a new engine built from scratch, not that I've got any intention of actually doing it :D I suppose one could build one out of air-cooled Japanese motorbike engine parts, but getting the oiling to work would be a job.

    Then, of course, there are Magirus-Deutz diesels ...
     
  30. Ned Ludd
    Joined: May 15, 2009
    Posts: 3,953

    Ned Ludd
    Member

    A Tatra V8 in a bike would be cool, installed longitudinally like in those Flathead bikes that have been built.
     

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