99101-124-0820 Main (#82) Jet - Overview. The 99101-124-0820 Main (#82) Jet is a critical component in Honda marine engine fuel systems, specifically supporting the carburetor system. Its primary role is to regulate fuel flow at higher throttle settings, ensuring efficient combustion and reliable engine performance. Designed for seamless compatibility with Honda marine engines, it maintains optimal engine operation and longevity by precisely controlling fuel metering.. Key Features. This is an O