15100-ZW1-000 Oil Pump Assembly - Overview. The 15100-ZW1-000 Oil Pump Assembly is an essential component of Honda marine engine systems. It supports the engine's lubrication system by circulating oil throughout the engine to ensure moving parts remain properly lubricated, preventing wear and overheating. This vital function is key to maintaining optimal engine performance and durability. Designed with factory precision, the oil pump assembly fits seamlessly with existing engine hardware, ensuri