SOURCE: Mower engine cuts out at exactly 1/2 full tank of gas
When that happens loosen the fuel cap and see if it stays running. If this is a gravity feed system make sure you have the correct fuel filter on it,the clear paper filters can allow vapor lock to happen,put the small briggs and stratton filter in it,which has a small chamber and a stainless screen.Also make sure there is no excess fuel line that would cause a dip or a high spot for a vapor lock to occur.
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