How do I switch between blowing and vacuuming/mulching? Your Blower Joe SBJ604E converts from blower to vacuum/mulcher in one easy step by simply turning the transfer lever switch from Blower Mode to Vacuum Mode, and vice versa; no tools are ever needed for blower/vacuum conversion. Related articles What is the reduction ratio of the mulch produced by my Blower Joe SBJ604E? What type of extension cord should I use with my Blower Joe SBJ605E? What should I do if my Blower Joe SBJ604E gets clogged or jammed? How many speed settings does my Blower Joe SBJ604E have? How fast is the rotor spinning in my Blower Joe SBJ601E?