I was tilling a part of my yard site and encountered numerous buried rocks of various sizes. The 647 tiller would just glang bang and cough them out. Then I encountered something that temporarily bogged the engine down then returned to normal. Curious I stopped to take a look and found a 2ft piece of rebar wrapped around the shaft. Took me a while with a crowbar to bend it in an orientation that allowed me to wrestle it off the shaft. Then back to tilling.
What a brute this tiller is. :thumbup1gif: