Ferguson TO30 1951: I bought a used Taylor Pittsburgh finish mower and picked it up this morning. I went over it checking everything then attached to tractor. My field has gotten away from me with all the rain and is 8-12 inch high grass. I began mowing and it worked very well but due to height I only took half swipes with the 5" deck. The tractor was running hard and nearly full throttle. After 3-4 times back and forth the tractor just shut off sort of sputtered and died. I waited a minute and attempted to restart which it ran for a few seconds sputtered and died. I then thought it was low on gas so filled the tank. Cleaned the sediment from the bowl and started it. It ran so I proceeded mowing. Made 2 passes and it sputtered and died. The amount of time varies that it will run but seems to only die out when working hard with 3/4- full throttle. When I had it running one time I took it in the back yard where the grass was low and it ran round and round mowing with no problem. So what is wrong?? I drained the carb too just in case dirt in there or something. Grass is not going to get shorter so I would appreciate all the help you can give me.