31116-ZVP-010 Flywheel Boss - Overview. The 31116-ZVP-010 Flywheel Boss is an essential component in Honda marine engine systems. This part functions as the mounting point and interface for the flywheel, which transfers rotational force from the engine's crankshaft to ensure smooth mechanical operation. Designed and manufactured to OEM standards, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine OEM Honda component designe