I took the mower into the shop a couple weeks ago. My own conclusion led me to pick up a new gas canister, put only about 1/2 gallon of gas in it so I'll need more in maybe a month max. I'm still on the fence as to whether or not to use Sta-bil in the gas container NOT the mower. I know it's corrosive, so shops would push not using it (?). But the problem may have been bad fuel. Got it yesterday and easily started it. I haven't had bad fuel since circa 1979 and was able to pinpoint it to where I got the gas. The GCV never had an issue in the 10 years that I had it.I have the same model with the 200 engine, contacted a company tech and he told me that pulling 2 or 3 times is normal, same response from my local dealer. I have found that if I go to start it and pull the cord out slow the first time and pull the 2nd time like I wanted to start it, it usually starts.