Hi all I have a Briggs and Stratton engine on a greenfield tractor 11. I have had it started before but have just put in some wiring for the electric start. The engine cranks really well but will not fire. Have checked spark and not long cleaned out the carby. But it will still not fire. It did once yesterday but the starter motor did not stop it kept on running. Can anyone please offer suggestions. Anything would be greatly appreciated. It does have a pull start as well but even using that I sill can’t get it to fire. Please help

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