Thought I would share this, I am at 5000 feet elevation putting the choke on all the way fouls the spark plug. I put it half way to completely off and it starts fairly quickly. It cuts like butter, I had to get used to how much gas power to use in cutting the different tree sections. I have past experience in pruning trees this was the first time in cutting a tree down. Man, it was a real workout as it was on a slope. The only complaint the cover for the pull cord had two small pieces of plastic break on the bottom section, needs better plastic material, otherwise I highly recommend buying this chainsaw.