Briggs & Stratton B&S WP2-35 Water Pump - B&S 550 Series™ engine, Cast iron volute & impeller increases durabilityThe pump head is fitted with cast iron volute and impeller for long life and durability. Briggs & Stratton engines run at 70% of maximum load to achieve the rated pump performance. This reduced load enables our pumpsets to be durable and very fuel efficient. The self priming feature ensures quick start up. Our pumps are manufactured with heavy duty components allowing them to handle wear and abuse. As a result, Briggs & Stratton water pumps are suited