99101-124-0700 Main (#70) Jet - Overview. The 99101-124-0700 Main (#70) Jet is an essential component of the fuel system in Honda marine engines. It plays a vital role in regulating fuel flow to the engine carburetor, maintaining optimal fuel mixture and engine performance. Designed to exact factory specifications, this main jet integrates seamlessly with existing carburetor hardware, contributing to reliable operation and fuel efficiency for your marine equipment.. Key Features. Precision fuel