11820-ZVL-B10 R Timing Belt Cvr - Overview. The 11820-ZVL-B10 R Timing Belt Cvr is an essential cover component for Honda marine engine systems. This timing belt cover protects the timing belt from dirt, debris, and damage, ensuring reliable operation of the engine's critical timing mechanism. Designed to maintain seamless integration with existing parts, it preserves optimal engine performance and durability.. Key Features. A genuine Honda OEM timing belt cover designed specifically for Honda m