the 224L is commercial duty. i have a honda with the same engine. i've been using it over 10 years now. they hold up to anything. now the more i think about it i think i will just wait on a 4 stroke blower. i'll just use my br600 until it goes poof and at that time look into buying a 4 stroke blower. by then they power on them should be up there alot more. it would be weird to buy a blower with less power. it would feel weak. you can only go up in power. i wish honda would make a backpack blower or an engine for one that husqvarna would sale. it doesn't even have to be as big as the 580bts or 570bts in power. if it was just something like 205-225mph and 750-800cfm it would be perfect.