Engine Exmark Quest Engine Surging?

henny

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Sep 9, 2016
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Have a 48" Quest (2006 model) and after about 20-30 minutes of mowing the engine starts to surge I guess is what you would call it. It's starts acting like it is cutting real tall grass and bogs down and then eventually dies if I don't disengage the blades soon enough. I've checked the spark and all is good. What else should I be looking for?
 
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