Small Engine Troubleshooting Problems? Ask a Mechanic Now.
If blades are not engaging it is normally either the PTO switch or the Clutch. PTO switch can be checked for ohms and the clutch can be tested by putting power directly to it from another power source. Both of these can be done at home if you order the correct parts
a battery charger and wire or you can use wires and jumper cables from a car to power it. any other 12V power source