Small Engines (Lawn Mowers, etc.): murray riding lawn mower, fuel lines, lawn mower

Question
eric, i have a 2000 murray riding lawn mower, model 283707 type 1139e1 code 0003152E . i crank and it wont start, i put a splash of fuel in the carb, & it will run til that is gone, which is a few seconds, i have cleaned the carburetor, checked fuel lines the are clear, changed the plug,(mainly just to do it) & i can't figure out what the problem is, should i just rebuild the carb which is walbro 0520497119 any help would be appreciated. thanks

Answer
Most non-mechanics with all due respect, don't really know how to clean a carb, or where to look for fuel circuits within the carb body. Not to mention after going through the trouble of pulling the carb, and cleaning it why even hesitate over throwing a $6.00 carb kit into it...I will guarantee you the carb still isn't right, what you explaining is a block in the main jet or main fuel circuit.......Tom