Originally Posted by piston slapper
That rock didnt get close enough to the valves to bend them....
Check for loose or damaged wiring on the engine...
Will do. I'll check everything just to be sure, but I don't know of any wiring under the mower anywhere...at least not that near the deck.
This was a huge rock that sort of wedged itself in the blades for a moment. It's probably 2 feet long and 4 inches thick and didn't break when hit. The blades look ok except for a nick and the spindles look ok and they still sound and look good too. Cuts well.