Issues together with your gasoline cap will resemble the conduct of your lawnmower when it is working out of fuel; vented caps are designed to let air into the gasoline tank and if there isn’t any airflow, your engine will cease. Suppose you turned on the engine and began mowing, however the machine started to die on you after a couple of passes. If it began sputtering and misfiring earlier than fully shutting off, there’s in all probability one thing unsuitable together with your gasoline cap; nonetheless, you may want to concentrate to your engine to make sure the fuel cap just isn’t venting.
If the engine runs appropriately proper after turning it on however slowly begins to behave up, it is doubtless because of venting issues with the fuel cap. If the sputtering or misfiring is fixed from the second you begin your engine, there are in all probability different issues together with your lawnmower.
If you happen to let your lawnmower relaxation for a bit after stalling and it runs positive whenever you begin it once more, it is positively the fuel cap; this occurs as a result of whereas it is likely to be clogged, it isn’t correctly sealed and air will get contained in the tank ultimately.