99101-GHB-1050 Jet, Main (#105) - Overview. The 99101-GHB-1050 Jet, Main (#105) is a critical component within Honda marine engine carburetor systems that regulates fuel flow at higher throttle settings. This main jet plays a vital role in delivering fuel efficiently to maintain reliable engine performance and optimal power output. Designed to meet rigorous factory specifications, it integrates seamlessly with existing carburetor assemblies, ensuring consistent operation and durability in demand