Small Engine Troubleshooting Problems? Ask a Mechanic Now.
First check the carburetor throttle shaft and the throttle flap in the carburetor. The flap can be off the shaft, or the shaft can be broken. If throttle checks out, see if you can control the speed by holding the throttle manually. And feel th governor linkage, governor should have a feel. push/pull to it. if not, the inner governor is broken.