Remove the air intake box from the engine using a wrench. It is a square or rectangular box using a single bolt through the top.
Locate the governor under the air intake box near the carburetor. The governor assembly includes a long handle, with a rod and several springs attached to it. Disconnect the control rod and the springs from the governor using a pair of pliers.
Remove the three bolts securing the governor assembly to the mower using a wrench. Place the air intake box on the mower and install the retaining bolt using a wrench.