99101-ZH7-0720 Main (#72) Jet - Overview. The 99101-ZH7-0720 Main (#72) Jet is a critical part of the Honda marine engine fuel system. This jet regulates the fuel flow during medium to high throttle positions, ensuring the engine receives the correct air-fuel mixture for efficient combustion and optimal power output. It supports the carburetor system in Honda marine engines, providing reliable operation and keeping the engine running smoothly. Designed to OEM specifications, it ensures seamless