Hey Scotty, I know you don't do mower engines that much but I was wondering if you had the answer to this. I have a Honda push mower my neighbor gave me a year ago before he moved away. It wouldn't start first couple of tries, so I sprayed some starter fluid in the carb and it started up and ran just fine for the whole 10 minutes I spent mowing the lawn.

I felt like starting it up again after a few hours but it wouldn't start unless I sprayed some starter fluid. I checked the carb and it didn't look dirty at all. What could be the problem?