99101-ZH8-0720 Main (#72) Jet - Overview. The 99101-ZH8-0720 Main (#72) Jet is a critical fuel system component in Honda marine engine systems. This high-quality OEM main jet plays a vital role in regulating fuel flow through the carburetor at higher throttle openings, ensuring efficient combustion and smooth engine operation. Engineered to strict factory specifications and dimensions, it integrates seamlessly with existing carburetor hardware to maintain optimal marine engine performance and du