Well, I finally got my John deere running (see "weak spark" thread), it ran for about an hour and then backfired twice made a funny scraping sound and quit. Now it won't start again, but after replacing the spark plug (mmm hmm) and checking for spark (that was ok) I find that the plug is not getting the least bit wet, even when choking. The fuel pump is fine the fuel filter is fine and there is gas in the float bowl. Apparently it isn't getting gas, but I don't know if it is a carb problem or something more sinister like valves or even worse cylinder / piston. Before I have the carb rebuilt is there anything I can do to check on other possibilities? Any help is appreciated.