Can an outdoor extension cord be used with this machine? Yes, you can use your outdoor extension cord. It has to be a 25 Ft Cord and 14 gauge. A cord greater than 25ft cannot be used with this unit. Related articles What extension cord can I use? Will I Damage my batteries if I leave it charging after it is fully charged? ICHRG40-DPC Can I use another brand's accessory with my Sun Joe pressure washer? Do you need to connect the hose every time you use it or does it stay connected when you unwind it from the reel? What type of extension cord should I use with my Blower Joe SBJ605E?