The mower stopped shortly after starting to cut and wouldn't start back up. It has a plastic carburetor. I pulled it and checked it. Float valve moves freely and parts don't seem gummed up. I put a small wire through each location just to double check. I put it back together, careful to double check the float valve is moving freely and gaskets are all in place. Now not only does it still not start, fuel is backing up into the air filter. I already pulled it back off to check that the float valve still moves freely (yes pin is in place) and it looks fine. Why do I have fuel backing up and why won't it start?
