I have a B&S Troy-bilt that I bought in April. I have used 3 times. On the 4th time the mower was working. It suddenly died. I assumed it was low on gas. I added gas and the pull rope will not pull. I am not sure how to fix any ideas.

Does it have any sort of warranty? Then working on it may void it. Let them deal with it. Is this a quantum, classic? Or a Over head valve briggs?

One thing I want to ask to make sure you didn't kill the engine... have you kept a check on the oil and it is of course to the full mark on the dipstick?