I know the basics of how a gas engine works, and have been having a hard time with my 2nd lawn mower (I cut a lot of lawns so need a back up). It has been idling like crap and had next to no power. I changed the oil, air filter, spark plug, and shot some carb cleaner in it. Didn't help...

Figure I had nothing to lose so pulled off the carburetor, fly wheel, fuel line, and gave it all a good cleaning.. I managed to get it all back together and it's run into better than it has in years!