Two mowers, one is about a year old, one is nearly new. Just obtained the newer one today. Neither will run. I think it has to be from not getting gas. Spraying starter fluid directly into carb will result in both of them starting and running for about 3 seconds (until the starter fluid is gone). I've drained/flushed the gas tanks. Gas is fresh and also had a little SeaFoam added. Removed the carb, cleaned the bowl with B-12, and sprayed as much B12 as I can to flush out the innards of the carb. Hitting the primer button, I can see fuel shoot into the carb. However, the carbs on these things are small, one-piece deals that really make it impossible to get into the jets. Also, there is no way to adjust the carbs that I can see, just a screw to back-off the throttle. What else can I try?