The 5.5 HP gas wheelbarrow has long been the top choice of framing and roofing contractors. In this class, the 4090HK17 stands out because of its high CFM output, portability and rugged build. Delivering 9.3 CFM at 90 PSI this unit incorporates the popular 5.5 HP Honda engine with automatic idle-down, for increased fuel efficiency, and an atmospheric unloading system to prevent oil consumption. Battle tested contractor tough? Theres only one way to find out. Get it dirty, run it hot and dont let up - just like a contractor. Thats how theyre used, so thats how theyre tested. Engines, pumps, motors, switches - every component of every ROLAIR compressor is battle-tested both in the field and at our Wisconsin factory. You have our guarantee that your ROLAIR compressor is ready to roll on day one, no excuses.