13331-Z8B-900 Key (25X18) - Overview. The 13331-Z8B-900 Key (25X18) is an essential mechanical component designed specifically for Honda marine engine systems. It plays a critical role in securing vital engine components through its precise fit within the crankshaft assembly. As a special Woodruff key, it ensures seamless integration with existing parts, maintaining optimal performance and durability. This key is manufactured to match factory specifications and tolerances, guaranteeing that it u