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All internal combustion engines have the same requirements. They must have the correct air fuel mixture and source of ignition in order to run. Although I am unfamiliar with the system you have, the fact thst it will start without the air filter but won't with the air filter indicates that you either have a dirty air filter (you said yours was clean) or you have too much fuel entering the combustion chamber. Beyond that I would only be guessing the reason (air fuel mixture regulator, worn jet, wrong size jet, something else bocking air flow etc.)