Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Welcome to JUST ANSWER small engines, let me try to help you !! I don't know it all, but maybe together we can get you a satisfactory answer!
DO you have adjustable screws on carburetor, or non adjustable? If adjustable, try adjusting the high speed screw while you throttle the engine.
See link above, in the top of the carburetor are the low and high speed screws.
Try Amazon , they have the tool individually and in sets.