99101-GHB-0980 Main (#98) Jet - Overview. The 99101-GHB-0980 Main (#98) Jet is a precise OEM fuel system part designed specifically for Honda marine engine carburetors. Serving as a key component within the fuel delivery system, it regulates the main fuel flow to ensure the ideal fuel-air mixture that optimizes engine performance and efficiency. With exact manufacturing to factory dimensions and tolerances, it ensures seamless integration with existing parts, maintaining optimal performance and