Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Briggs and Stratton 793880 is the camshaft for this model.
What you have is too much compression. First thing t check is the valve clearance, needs to be set on the low side,.004 to .006 inch, intake and exhaust. If it does not help, run a compression test and if the compression is 100 psi or more, your camshaft with the compression release on the back side of the camshaft gear is broken.
The compression release is a spring loaded weight , on the back side of the gear and if it breaks, do not release the compression for easy start. Repair is to replace the camshaft! Common failure on this camshaft!
There is no high torque starter for the engine. You may want to check voltage to the starter when it is engaged, and if the voltage stays above 8 volts, battery and starter are ok.