That thing is a death trap, where are the safety guards? It's just a matter of time before you trip and fall into that thing when it's running and it takes your head right off.
Do yourself a favor... let me come pick it up and I'll make sure that it's disposed of in a safe manner.
If you insist on endangering yourself, your family, and your neighbors, put a wiper of some sort (even a small paint brush) against the blade but before the wheel. It'll help keep chips out of the tires and they'll last longer.