The Hypro D813GRGI & Honda GX390 Electric Engine Assembly combines a high flow three diaphragm pump and a quiet, reliable electric start engine perfect for your spraying needs. Spray up to 21 gpm or 725 psi with this diaphragm pump. Whether you are replacing your current setup on a lawn truck or starting new this is an option for you. Simply attach to a rig to quickly construct your own high performance sprayer.