2001 Honda 130 runs fine until I shut it off

Frfighter222

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May 15, 2017
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Honda cranks and runs fine for hours until I turn the motor off. Once I turn motor off it will only turn over until I wait a couple hours. Once it cranks back up it will run like new until I turn it off again. Fuel pump kicks on when problem occurs, plugs fire but are dry when taken out to check for spark. I had an extra ecm and plugged it in when problem occurred and motor fired right up so I swapped them out. Took motor out and same exact thing happened with new ecm. I put old one back on when it happened and motor fired right up. Any suggestions on what might be happening??
 
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