06125-ZZ3-E00 Gear Case Kit - Overview. The 06125-ZZ3-E00 Gear Case Kit is a crucial component designed for Honda marine engine systems. This kit supports the lower gear housing unit, playing an essential role in maintaining the mechanical integrity and reliable operation of your outboard motor. Engineered for seamless compatibility and durability, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Complete kit for the gear case sy