12011-ZW5-040ZA Short Block *NH8* - Overview. The 12011-ZW5-040ZA Short Block *NH8* is a fundamental component of Honda marine engine systems. This short block assembly forms the engine's base structure, supporting the crankshaft, pistons, and connecting rods, integral to the engine's mechanical function and durability. As a core part of the engine system, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine Honda OEM Short B