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Thread: ATC70 drove through a puddle and lost spark

  1. #1
    Join Date
    Mar 2017
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    Chico CA
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    119

    ATC70 drove through a puddle and lost spark

    Took off the recoil cover and it was a little wet but not soaked. I hosed it down with starting fluid and blew it out with air. Still no luck. Any ideas? Did I fry something? : Should I use this as an excuse to throw it away and get a 140cc?

  2. #2
    Join Date
    May 2016
    Location
    OH Canada
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    1,102
    How big was that puddle? LOL

    Possible it may have got wet in the kill switch(?)
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------

    '83 200X

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  3. #3
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    Mar 2017
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    Chico CA
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    Quote Originally Posted by Rob Canadian View Post
    How big was that puddle? LOL

    Possible it may have got wet in the kill switch(?)

    Puddle/pond.. You know... I was watching the intake and didn't think to watch the pull start hole.

    No kill switch on her. right now have to kill it by pulling off the spark plug wire.

  4. #4
    Join Date
    Jun 2009
    Location
    Leander TX
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    2,219
    Try a new plug. Sometimes the porcelain cracks when they're hot and get wet.

    Had this happen on a 400 SBC in a Blazer once when wheeling through mud. Took a long time to figure out the plug was bad.

  5. #5
    Join Date
    Mar 2017
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    Chico CA
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    119
    Tried the new plug and still no love. Time to find a repair manual and bring out the ohm meter. =/

  6. #6
    Join Date
    Jun 2010
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    Cold Lake, Alberta, Canada
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    Simple things first. Did you unscrew the spark plug boot to see how the connection is? Pull all your connections apart and blow them dry just to be safe. It ran before the puddle.
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  7. #7
    Join Date
    Jul 2012
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    Next time build a snorkel before you go submariner on the old 70.

  8. #8
    Join Date
    Apr 2011
    Location
    Mexico
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    I suspect the issue is that you drove a puddle jumper through a puddle rather than well, you know... jumping it.
    It sucks to get old

  9. #9
    Join Date
    Mar 2017
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    Quote Originally Posted by 3 Wheel Drive View Post
    Next time build a snorkel before you go submariner on the old 70.
    I have been thinking about that. But in this case the water did not make it anywhere near the intake.

  10. #10
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  11. #11
    Join Date
    Jun 2013
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    Quote Originally Posted by shortline10 View Post
    New points and condenser , only OEM no china junk .
    I agree with Mike, when I read your posting a couple days ago thought did you remove the flywheel/stator to clean or raise with starting fluid, which isn't a solvent cleaner and won't remove the rust / corrosion between the points contacts. Clean the points faces with a thin file and piece of cardboard like a match cover, old timer's trick.

    "HJ" Click image for larger version. 

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    ’84 YT60
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  12. #12
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    Mar 2017
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    Quote Originally Posted by HairyJR View Post
    I agree with Mike, when I read your posting a couple days ago thought did you remove the flywheel/stator to clean or raise with starting fluid, which isn't a solvent cleaner and won't remove the rust / corrosion between the points contacts. Clean the points faces with a thin file and piece of cardboard like a match cover, old timer's trick.

    "HJ" Click image for larger version. 

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    Fresh water, and had it blown out with starter fluid and compressed air within 30 minutes. I would hope it could not have rusted in that short amount of time. Then again maybe the points are that sensitive?

  13. #13
    Join Date
    May 2016
    Location
    OH Canada
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    Quote Originally Posted by Quinc View Post
    Fresh water, and had it blown out with starter fluid and compressed air within 30 minutes. I would hope it could not have rusted in that short amount of time. Then again maybe the points are that sensitive?
    I don't think rust is the issue as you are thinking. I am not sure if the starting fluid put a layer of film on the contacts of the points.

    Try a new points and condenser. OR at least give a quick file on the points.
    -------------------------------------------------------------------------------------------------------------------------------------------------------------------

    '83 200X

    Chicks love guys that ride trikes

  14. #14
    Join Date
    Mar 2017
    Location
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    I got the flywheel off and it looks like there should be something on the crank or flywheel that opens and closes the points? Still has the felt that cleans it. Anyone have a picture of one in working condition?

  15. #15
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    Quote Originally Posted by Quinc View Post
    I got the flywheel off and it looks like there should be something on the crank or flywheel that opens and closes the points? Still has the felt that cleans it. Anyone have a picture of one in working condition?
    The flywheel or stator has an eccentric cam lob built into the center hub which opens and closes the points. Points need to be set / adjusted to open at the "F" flywheel timing mark to run. I've added a pic of a modified / machined flywheel a fellow member "KASEY" posted on the site many years back. Setting and or adjusting the points is difficult for even the best of us.

    Click image for larger version. 

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    "HJ" Click image for larger version. 

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    ’84 YT60
    ’85 350x (423cc) with ’81 XL500 head conversion
    ’83 XR500 (628cc) converted 3 Wheel hybrid
    ’73 CB750 K3 converted 3 Wheel hybrid
    ’86 TRX250R chassis XR650L engine hybrid
    ’89 TRX250R (stock )
    ’90 LT500 Quadzilla
    ’85 FL350 Odysses ( water cooled head )
    Lost (sold) but not forgotten ’80 ATC 110 (205cc on alcohol ) ’83 200x ( 222cc ) ’83 200x ( 185s eng ) ’85 350x ( stock )
    added to the collection recently, (2) '70 US90 Aquarius Blue and '74 ATC90 Daytona Orange

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