I just purchase a Homelite 45 cc from Harbor Freight. The engine comes with a Zama carb. When I run the engine it seem to lag going from idle to high speed when I hit the throttle hard. I have tried richening up the low speed needle and this has helped but it still seem to hesitate a little. I have a new Walboro Carb coming from Peter at Wacker engines, but I wanted to get some feedback from you guys. Am I doing somthing wrong or is the Zama carb a lemon?