i have a mcculloch i bought at a yard sale for $2.00 it is a pro mac 3505av-16 special edition. i had to put new fuel line on it.it ran great even better than my brand new poulin. but after a month or two it just stopped running. i was cutting with it yesterday and when i turned it off it wouldnt start back. i checked the fuel line and filter both were good then checked the sparkplug it was fireing. i let it set for a little while thanking it might have been floded. then tried to crank it it cranked and ran for about 10 seconds and quit again.thats all it will do run shortly then quit. i thank it may be a gas problem but im not sure. i would love to get it running again it cut so good i rather use it than a new one. can anyone give me some idea how to fix this. thanks cutter.