04104-ZY3-050ZA Cyln Crank Assembly Kit - Overview. The 04104-ZY3-050ZA Cyln Crank Assembly Kit is a critical component within Honda marine engine systems. This complete assembly kit supports the core engine system, focusing on the cylinder and crankshaft assembly essential for maintaining smooth mechanical motion and power delivery. Designed to comply with factory specifications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features.