Posted by dave2 on March 11, 2012 at 12:46:28 from (79.240.143.150):
One more time folks... The part I was trying to figure out is the stator... Anyway... need a little troubleshooting help. I don't have a shop manual and the owners manual doesn't help much. This a 250 cc yamaha ATV but I believe the problem is generic and I believe someone talked about it with a tractor before.....
Anyway,
it won't start with the electric start, cranks good but won't fire. A quick pull on the rope and it kicks right off.... Idles fine and revs decent. After it is warm it will sometimes start with the starter but usually not. Always starts right up with the rope.
This just started after I ran it without oil and almost siezed the motor..... Things got pretty warm down there......
The way it's acting is there just isn't enough power to fire the plug when the starter is turning. Also, when you ride it, it goes along just fine to about half throttle then looses power after..... Carb is fine, has been cleaned and adjusted..... Even put a carb off the same one that was/is running fine with the same results.......
Any idea where I should look? As far as I can see, there only 4 parts to the ignition. The CDI box, the stator, the coil, and the sparkplug. The part exposed to the heat was the stator, but could it be causing the problem I'm having?
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