can not start the engine.

Discussion in 'Motorized Bicycle General Discussion' started by aportiz, Aug 23, 2011.

  1. aportiz

    aportiz New Member

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    Hi
    Every body.
    I need Help.

    I got 6 year installing motor on bicycles and this is the first time i can not get
    an engine to start.

    This is what happen: i bought a lot of 20 engines every one work with out no problems but i have one that i install on a bike put a bout 10 miles on it and
    after that can not start any more. change the spark plug, cdi, coil, magneto,
    carburetor, cylinder bottom gasket, head gasket, i thing that i did everything
    i can to get it start. Any body have a solution.? that happen to any body.?
    can you gays give me some advise of what is going on or what can possible
    happen.?

    Thank's

    Aportiz
     
  2. tim turbo

    tim turbo Member

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    Did you check to see if you have spark? Is there gas in it? Is gas getting to spark plug?I would do a bunch of checking before I would throw abunch of parts at it. Just saying!
     
  3. Al.Fisherman

    Al.Fisherman New Member

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  4. Mike B

    Mike B New Member

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    Change the engine.

    You've changed everything else, why not?
     
  5. aportiz

    aportiz New Member

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    this is fanny gays, but i not give up until i find out what is going on, because
    the angle of the engine is ok. gas is flooding everything is check ok. the engine is slant head my next step probably is going to be strait plug head.

    thanks gays for you input.

    Aportiz
     
  6. GearNut

    GearNut Active Member

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    Check it for air leaks. pressurize the whole engine to about 3 PSI through the intake port or spark plug hole and spray the whole thing down with Windex or Mr. Bubbles.

    3PSI max or you risk popping the crankshaft seals out. Easy enough to reinstall, but why make more work for yourself.

    Here's a video of it being done:
    Leak Down Test For 2-Stroke Engines.avi - YouTube

    Edit:
    The guy in the video says 9 PSI, but I would not recommend going above 5 with these Chinese engines.
     
    #6 GearNut, Aug 23, 2011
    Last edited: Aug 23, 2011
  7. dan+1

    dan+1 New Member

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    I know silly enough, but are you sure the engine is turning over, my clutch was slipping and the engine would not fire off due to not turning.
     
  8. FarRider

    FarRider New Member

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    English speak good you do.
    Sorry, just kidding, spark? compression? fuel? no vacuum leaks? is it turning over?
    Thats the problem with buying engines in lots... sooner or later your gonna get a lemon, so make lemonade, check it for vac leaks,
    FR
     
    #8 FarRider, Aug 23, 2011
    Last edited: Aug 23, 2011

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