For high flow and high quality check out the Ace GE-660-HONDA Gas Engine/Pump Combo.  With up to 110 gpm and the reliability of Honda you can feel secure you will get the job done efficiently. 

Ace GE-660-HONDA Gasoline Engine Driven Cast Iron Centrifugal Pump. Cast Iron pump mounted on 5.5 HP Honda Engine.

110 gpm, 120 psi. 1-1/2" Suction x 1-1/4" Discharge.

Features:

-Impeller attaches directly to 3/4" keyed shaft on 5.5 HP engine.

-Stainless Steel shaft sleeve with O-Ring leak protection.

-All iron construction.

-Available complete or less engine.