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Christian Hubbell

things to check…  The pulse line and the pumps themselves can fill up with oil and you may have not enough fuel.  You should see almost a constant stream of fuel coming out of the carb and a constant stream in.  Fuel filters, plugged jets and at least two vents are next.  Which carb?  Pwm or pwk?  My pump around works well and usually start my kart by spinning the rear tire by hand.