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  1. #11

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    Quote Originally Posted by Myself View Post
    Not to mention, the starter drive is clutched and would just freewheel in the wrong direction......wouldn't even crank the engine over.

    Maybe just coincedence and the midshaft splines OR impeller splines stripped out. Maybe even trashed out pump bearings.

    could you,please, if you know, explain me how could it happened and simple drive shaft turns in completely opposite direction?


  2. #12
    steve45's Avatar
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    It's not turning in the wrong direction. It appears to be because of the frame rate of your camera.

  3. #13
    Reaper9789's Avatar
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    Looks like its spinning the correct way to me.
    I agree with steve, it only looks like its spinning the wrong way because of the camera frame rate.
    Sucking in smoke though, that seems weird.

  4. #14
    I see where its turning in the proper direction at first, but it really looks like once it gets started its going the opposite direction. It is sucking in the smoke. I dont know, it is really wierd.

  5. #15

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    Could the stator keyway be broke causing the timing to be off?

  6. #16
    steve45's Avatar
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    Quote Originally Posted by Jonesyfxr View Post
    Could the stator keyway be broke causing the timing to be off?
    A broken flywheel key would definitely change the timing, but I don't think it would start backwards with a forward turning starter. If it did, it would probably strip the gears on the starter or something.

  7. #17
    Reaper9789's Avatar
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    Quote Originally Posted by steve45 View Post
    A broken flywheel key would definitely change the timing, but I don't think it would start backwards with a forward turning starter. If it did, it would probably strip the gears on the starter or something.
    Is the older 2 strokes directly connected like the newer 4 strokes? On my 1800, if it was running backwards, it would have to spin the starter since they are connected via a one way bearing. There is no bendix.

  8. #18

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    Quote Originally Posted by steve45 View Post
    A broken flywheel key would definitely change the timing, but I don't think it would start backwards with a forward turning starter. If it did, it would probably strip the gears on the starter or something.
    Just thinking outside the box. I don’t see how it would be possible to run backwards even with a normal rotation starter…. But hey, ya never know!!

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  10. #19
    DavidH's Avatar
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    In some rare/odd scenarios, 2 strokes can absolutely kick back and run backwards. I saw it happen more than once with model RC aircraft engines, we'd have to throw a rag into the prop to stop it and start it the correct way. Timing must be off or your compression is seriously Effed to do it with a starter turning it over.

  11. #20
    steve45's Avatar
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    Yes, of course the 2-stroke model airplane engines can run backwards. There is no timing control, only a glow plug. However, there is also no starter and starter clutch to contend with on a model airplane.

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