15021-399-000 Oil Pump Rotor Set - Overview. The 15021-399-000 Oil Pump Rotor Set is a critical component designed specifically for Honda marine engine systems. It is an OEM genuine part that supports the engine's oil circulation system, ensuring proper lubrication that contributes to smooth operation and extended engine life. With precise engineering to match factory specifications and tolerances, this rotor set integrates seamlessly with existing components, preserving the optimal performance and durability of your Honda marine engine.. Key Features. Replacement rotor set designed for Honda oil pump system.. OEM genuine part that matches exact material, dimensions, and tolerances.. Supports proper oil circulation vital for engine lubrication.. Ensures seamless integration with existing seals and housings.. Manufactured to maintain expected durability and performance.. Suitable for a broad range of Honda marine engines ensuring compatibility.. Why Choose Genuine OEM. Using original Ho