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Thread: WTH


  1. #1

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    WTH

    i got this engine in some trade stuff. so i was gonna run it in test stand to check it out. i got to the point of starting and found the glowplug here. what was OS thinking here.
    engine is an old OS 90fs. i think im gonna pass on this situation.
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  2. #2

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    RE: WTH

    Looks like the prop just clears it. What is the problem?
    A couple ofalligator clips and a D cell might be helpful in this situation.

  3. #3
    Moderator w8ye's Avatar
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    RE: WTH

    When this engine was designed, everyone, used a right angle glow plug connector shaped like a spring type clothes pin.

    Now people use a short remote glow adapter fastened somewhere behind the engine. And that is where you connect your igniter.
    Attended the CutFinger Institute of DirtNap University for years but never did graduate....
    Recipient, Mangledhand award August 2008
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    RE: WTH

    do yall know how old this OS is ? also it has what appears to be a pump as part of the back plate. is it a pump ? i just couldnt believe they set this engine up like this. seems kinda dangerous for the mass.

  5. #5
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    RE: WTH



    I think it is arround 1988


  6. #6
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    RE: WTH

    ORIGINAL: A6TEXAN

    do yall know how old this OS is ? also it has what appears to be a pump as part of the back plate. is it a pump ? i just couldnt believe they set this engine up like this. seems kinda dangerous for the mass.
    First introduced in 1983:http://osengines.com/history/ostimeline10 The FS-91S shows up in 1988.

    Two choices for dealing with the plug are an onboard glow driver or a remote connection.

    AMA 87959

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    RE: WTH

    Resulted from their design choice of putting the cam and pushrods at the rear of the engine. Likely easier to put the cam on the end of the crank rather than between the crank throw and prop drive.

  8. #8
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    RE: WTH

    Good morning Richard, he needs some of this stuff.

    http://www.sonictronics.com/xcart/home.php?cat=329
    Farmall 240 the final issue of the Farmall C, Super C, 200, 230 series.
    122 Cu. In. 22 hp. A small tractor that would do big work due to its 10x36 inch rear tires.

    As competition improves products, the differences between them get smaller and smaller

    Club Saito member #5

  9. #9
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    RE: WTH

    yeah the old early version OS 4 stroke engines and the Enya 4 stroke engines all have a front angled glow plug on them like that.
    You need to use a glow plug adapter or use a angled clip like they used many years ago, or a pair of aligator clips.

    Here is a Enya engine glow plug adapter used so one can use our modern nicad glow ignitors on the engines. This puts the ignitor back behind the engine in a safer location.

    Club Saito #722, Sig Kadet Brotherhood #80, GlowHead Brotherhood #14,
    AMA # 928076

  10. #10
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    RE: WTH

    I think the prevailing theory was: Put the pushrods behind the head to protect them in case of a crash. Makes sense - until you realize that most people are not going to buy a special glow clip
    Mike B. AMA# 42400 www.gettingairborne.com
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  11. #11
    Moderator w8ye's Avatar
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    Attended the CutFinger Institute of DirtNap University for years but never did graduate....
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  12. #12
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    RE: WTH

    Someone should tell this guy:

    [youtube]http://www.youtube.com/watch?v=-xHKBIWasKg&feature=results_main&playnext=1&list=PL701B8B194D499D87[/youtube]

  13. #13

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    RE: WTH

    There were more of this version of an OS 15cc four-stroke flying at our club field in the early nineties than there were front pushrod engines. They ran fine, made adequate power and had an endearing miss at high throttle, just like the Enya four-strokes they emulated.


    Ed Cregger
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  14. #14

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    RE: WTH

    They have a great sound, a little different than the Surpass. I have one in a VQ Hurricane with a 13/8 TF wood prop. I need to slow him down though.

  15. #15

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    RE: WTH

    This 90 is actually a fine engine. Many great four cycles had the plug in front.

  16. #16

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    RE: WTH


    ORIGINAL: Mr Cox

    Someone should tell this guy:

    [youtube]http://www.youtube.com/watch?v=-xHKBIWasKg&feature=results_main&playnext=1&list=PL701B8B194D499D87[/youtube]
    Its only a little engine . It wouldnt cause MUCH damage . Cheers the pope

  17. #17
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    RE: WTH

    I've got one of the FS-90 engines. I really like it a lot. I use an old GloBee Fire plug and a regular Sullivan glow plug clip.

    It idles so slow that I just reach in and disconnect the glow plug clip before the other propeller blade has time to come around....
    Club Saito member #715
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  18. #18
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    RE: WTH

    Put it on a plane and sell it to me
    Life should not be a journey to the grave with the intention of arriving safely in an attractive and well preserved body, but rather to skip in sideways, a glass of Malbec in one hand and chocolate in the other. Body thoroughly used up, totally worn out and screaming " Woo Woo, what a ride"

  19. #19

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    RE: WTH

    Hi!
    What to say!
    What a fool!!!
    Jan Karlsson - Supplier MVVS Products

  20. #20

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    RE: WTH


    I got int rc back in 1984. Grew to love and own many of the .40 fp. Maybe my eyesight is going but for the life of me I cant find it at that website below. When did the 40 Fp show up on scene?


    ORIGINAL: piper_chuck

    ORIGINAL: A6TEXAN

    do yall know how old this OS is ? also it has what appears to be a pump as part of the back plate. is it a pump ? i just couldnt believe they set this engine up like this. seems kinda dangerous for the mass.
    First introduced in 1983:http://osengines.com/history/ostimeline10 The FS-91S shows up in 1988.

    Two choices for dealing with the plug are an onboard glow driver or a remote connection.

    Pull back houses get smaller
    Pull back more, houses get bigger !

    http://sigfourstar.weebly.com/

  21. #21
    bob62's Avatar
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    RE: WTH

    Engine is a 90 not a 40
    Life should not be a journey to the grave with the intention of arriving safely in an attractive and well preserved body, but rather to skip in sideways, a glass of Malbec in one hand and chocolate in the other. Body thoroughly used up, totally worn out and screaming " Woo Woo, what a ride"


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