I have a Snapper Ninja mulching push mower. Don't know the year. Suddenly I can't pull the pull cord more than 7" sometimes 10" out. I had just started it and made a couple passes and it died. When I tried to start it again that's when I had issues with the pull cord. I have tipped it over, can't see anything stuck up in there from the bottom. I removed the top cover that houses the pull cord and it pulls freely but not when it's fastened onto the mower. Could this be a worn choke cable or the other cable that attaches to the lever you hold in while starting and running the mower.