Won't start Stihl MS-250
I inherited a almost new Stihl MS-250 chainsaw. It was new in Winter/Spring 2004. I am sure it was only used a couple of times. It sat in a garage with fuel in it since that time. I tried to start it with the existing fuel. It started once for a few minutes. Great I thought, mixed up fresh fuel and added it to the tank. Since then I cannot get it to start. Before I bring it to a dealer for service is there anything else I can try on my own? New spark plug? Air filter is clean. Topped off the chain oil. The chain does move properly and feels tensioned well. I'm new to chainsaws as well and want to keep things safe. I do apply the chain break when starting.
Thanks in advance.