50212-ZV1-000 Friction Block - Overview. The 50212-ZV1-000 friction block is a vital component in Honda marine engine systems. It supports the swivel case system and plays a critical role in the smooth operation of the engine's mechanical functions. Designed to meet exact factory specifications, the block friction ensures optimal friction management and seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. The friction block is an OEM genuine co