You shouldnt be running your machine with the doors shut. it will wreck the machine. I bought a trailer mount, which had been run with all the covers/lids down, and it needed a new carb, fuel lines, etc as they all got clogged from recirculating the exhaust fumes. Not to mention the air filters breathing in all the dirty fumes.
Just bolt it down so the pikeys cant steal it while your round the back washing the patio?