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Old 07-13-2009, 07:13 PM
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punkid punkid is offline
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Join Date: Jul 2009
Location: NH
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Well I don't know too much about these tractors yet, but if this was a car I would say you are running it real hot and your starting to experice detonation. I would try running a tank of premium fuel and see if it goes away. if so it might be time to remove some carbon, and or clean the outside of the engine to make sure your getting full cooling.
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