This is the Honda GX200 replacement engine for Keene and Proline 5HP-6.5HP pumps used on many dredge and highbanker models for decades. A perfect upgrade for those that have the older, less fuel efficient and less reliable motors. Not just any GX200 will do, as most Keene and Proline pumps have impellers that thread directly onto the end of the engine shaft. There are exceptions however so be sure and double check your exact engine model number. If your pump has a 5/8″ threaded shaft though this is the engine you need. The Honda 196cc GX Series OHV commercial-grade engine is designed for the most demanding commercial applications. It has set an industry standard for reliability and durability. The overhead valve design offers cooler, fuel-efficient operation and cast iron cylinder sleeve provides longer service life. The GX is reliable, easy starting and quiet running. Meets EPA and CARB emission levels standards.