I've enjoyed looking over post for the past month. I'm hoping some of you can help me. I'm using my saw to cut firewood. My Husky 435 is one year old and has had maybe 3-4 gallons of gas run through it. I brought it into a local dealer because it was almost impossible to start after the saw was shut off when hot. The condensed version of the story is that a stuck piston ring was discovered which damaged the cylinder and piston. Husqvarna won't honor the warranty because they say I ran straight gas (which I did not). Because of a couple different details the dealer absorbed the labor costs and I paid for the new cylinder assembly. Now I'm concerned that whatever caused the piston to become stuck the first time, might happen again. I have a couple of questions... 1. Is it possible the ring was never seated correctly to start with? 2. Could this be a result of the 10% ethanol gas sold locally? I've bought the gas at a quality station and used the 87 octane grade. I've used the husqvarna low smoke oil. I've read many posts about using a higher octane grade and possible even adding a marine stabilizer to offset the ethanol. 3. Do I need to break the saw in again, like when it was new because of the new cylinder assembly (the manual says something to the effect of only running it for 1/2 hour at a time for the first 10 hours)? Thanks for your thoughts!