For me with motors.......it's always a new plug, then make sure its got good spark. Next is off to the fuel system, if you didn't smell gas from being flooded after pulling and pulling then thats your problem.......time to check filters and gaskets and carb/choke..... hmmmm i am guessing they charged you 425 for a 5 dollar gasket and a half hour work. Maybe it's just me but i wouldn't be thanking them
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