41100-Zvp-803za Gear Nh565 Case - Overview. The 41100-ZVP-803ZA Gear NH565 Case is a crucial component in Honda marine engine systems, specifically designed as a gearcase assembly. It serves to house and protect the internal gears of the outboard motor, ensuring smooth mechanical motion and reliable power transmission. Engineered to meet factory specifications, this genuine OEM part guarantees seamless integration with existing engine hardware, maintaining optimal performance and durability over