99101-124-0880 Main (#88) Jet - Overview. The 99101-124-0880 Main (#88) Jet is a precision-engineered carburetor component essential to the fuel system of Honda marine engine systems. It regulates fuel flow at higher throttle settings ensuring your engine runs efficiently and reliably. Designed to seamlessly integrate with Honda carburetor systems, it maintains optimal performance and durability for your marine engine.. Key Features. The main jet #88 controls fuel delivery accurately during high