Hi guys, I ran a couple of tanks of gasoline, with the Seafoam added, after I drained the carb bowl, and the engine is running really smooth and starts the first time (cold start may take two pulls). I never used to use stabilizer in my gas, and sometimes I left it in there all winter, so I'm sure I had gum, etc in the carb. I don't do that any more, and with cleaning, I think this Honda engine has a lot of years left in it. It doesn't use a drop of oil, so I'll run this mower until the wheels fall off. Thanks for the tips.