Sorry, its a hustler raptor flipup 54, 933853 mod num, 16057849 ser num. Shunted seat switch, key module and solenoid replaced. Ill try the gas cap. Filter LOOKS ok. But is now suspect. Other ideas? And thanks loads. By the way, in “flight chekin” the thing; sometimes, if I slap the pto down, it will continue to run, sometimes no, sometimes levers to park AND pto off will run, sometimes not. Drivin me insane.