This question is for winterizing the machines. I did all my 4 cycle things already. My main concern now is the 2 cycle machines and the 4 cycle that don't have a fuel shut off valve. My generator does not have a fuel shut off valve. what do i do gas wise? do i drain the gas? or fill it up to the top with gas/stabilizer? If i keep it full, the carb will gum up eventually. Also, with my stihl blower and trimmer, they obviously don't have fuel shut off valves, do I drain the gas out of them as well? Any info would help. Thanks!