This is a 5 yr old mower that was running fine when I put it away last fall. I did not winterize so the stale gas sat in there all winter. Drained the tank and bowl and added fresh gas. Started fine and then died after about 2 min. Tried removing the gas cap to see if that was the problem, no change. Tried running the engine on straight carb cleaner using a separate fuel line, no change. Removed carb and cleaned according to directions on the web, no change. At this point I'm considering just replacing the carb (they're cheap). Thoughts? Best place to buy a new carb?