1.?Hydraulic Power Unit?: Replacement Part Number: V351HPU1. The power unit operates on a 12V electrical system, ensuring compatibility with the majority of boats and marine applications. 2.?Enhanced Quality?: Crafted with premium materials, the V351HPU1 Marine Hydraulic Power Pump Unit offers increased power and extended service life. Each V351HPU1 Hydraulic Power Unit undergoes rigorous testing before leaving the factory to ensure the quality of every product.