Mower blades will not engage when I pull the switch to engage. I have checked all wiring for wore places, seat switch, all plugins and anything else I could find. Mower is only 3 years old with 194 on the meter. Stumped.

Hi,
Check just inside the right hand frame for the wires going to the clutch. There has been some issues with the ground(usually) wire breaking.
Peace,
Clarke