My son was cutting the grass with our Scott S2546 lawn tractor and he went threw a large clump of grass and the mower choke out. I cleared the grass and debris from underneath the mower. Now it won't start and the starter won't engage. Also when you turn the ignition switch I can hear a clicking on the engine. What do you think is wrong?"

Likely as dead battery, jump it from your car or recharge for a few hours.