99101-ZH8-0850 Main (#85) Jet - Overview. The 99101-ZH8-0850 Main (#85) Jet is a vital component within Honda carburetor fuel system that regulates fuel flow for optimal engine performance. It plays a key role in maintaining smooth operation and efficient fuel delivery in Honda marine engine systems. Manufactured to precise factory standards, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Precisely calibrated Main Jet size #85