i also have a husky 455 that run great for about 5-10 min, then boggs down to the point where it won't turn the chain. i've checked if the chain was too tight, mixture is fine, oiling for the bar is working great! it seems like it's firing on every other stroke! i shut it off for about 5 min. start it up again, & it runs great for another 5 min then does the same thing over again! i haven't messed w/ any adjustments, and i've checked the fuel for water, fuel lines look good also. filter is nice & clean, could the ignition be heating up? any help would be great.....

Mark, October 2009

Hard to start, hard to keep running!
I found the least painful solution was to buy a Echo :)

billsr, November 2009

Could well be ignition, however i have seen problems with the fuel tank breathers, the breather is situated under the starter cover set down in a recess, it is white in colour with a nipple on top, if it is not working it will vacume the tank and starve the engine of fuel, to remove grab with long nose pliers and pull out the assembly. To prove the point, when the saw starts to run bad slacken off the fuel filler cap, if it picks up again it is a breather issue

Husqvarna man, October 2009