How do you adjust a 5hp Tecumseh valve clearance?

To adjust the valve clearance on a 5hp Tecumseh engine, first ensure the engine is off and cool. Remove the valve cover, then rotate the engine to set it at top dead center (TDC) on the compression stroke. Use a feeler gauge to measure the clearance between the rocker arm and the valve stem; it should typically be between 0.004 to 0.006 inches. Adjust the clearance by loosening the lock nut on the rocker arm and turning the adjustment screw until the desired clearance is achieved, then tighten the lock nut and reassemble the valve cover.