Ok..Got a mint McCulloch 'Mac 3200' saw. Betting less than 2 hours use. But, I can see why! I replaced fuel lines- I replaced Spark plug- I replaced the filter in tank- I cleaned carb twice. The diaphrams/gaskets in carb look new. I am baffled on why it runs like no tomorrow for 5-10 seconds then goes down to idle..then dies? Appears it is running out of gas? Tried the H/L set screws at numerous settings starting at 1 1/8 turns out. It was running slightly longer when I took it out on job sight last week..but not good enough to use. I also removed spark screen- no help. ANY IDEAS? I'm loosing my sanity on this thing! 5lb Hammer is next in line to try. Thanks- Geno Getting a cheap Poulan 'wild thing' tomorrow- This a 'throw away saw'?