15331-KRF-S00 Oil Pump Rotor - Overview. The 15331-KRF-S00 Oil Pump Rotor is a critical part of the Honda marine engine lubrication system. Designed specifically for Honda Marine engines, this oil pump rotor plays a vital role in circulating oil throughout the engine to protect internal components from wear and overheating. Precision-engineered to Honda's exacting specifications, it ensures reliability and durability in marine environments. Compatible with Honda's engine lubrication system, it m