99101-ZG0-0650 Main (#65) Jet - Overview. The 99101-ZG0-0650 Main (#65) Jet is a critical fuel metering component in Honda marine engine systems. It plays a vital role in the carburetor by precisely controlling the amount of fuel entering the combustion chamber under various engine operating conditions. As an OEM part, the jet matches factory specifications, ensuring reliability and seamless integration with existing carburetor hardware, maintaining peak engine efficiency and durability.. Key Fe