Compatible with MFS2A, MFS2B, MFS2C MFS3.5A, MFS3.5B, MFS3.5C (Also compatible with Mercury) This is a carburetor set up specifically for Tohatsu 2 horsepower outboard motors! The internal components have been modified and tuned to fully unleash the potential of the Tohatsu 2 horsepower engine. The base is a 5 horsepower carburetor. Simply replacing the carb allows for easy speed increases exceeding the 3.5 horsepower carb. On my Tohatsu 2 horsepower engine, the actual speed with this carb installed is 16 km/h on average with a 300cm Achilles boat and one person on board ★ Installation of the carb is basically plug-and-play, so it's easy to install(^^) Pilot adjustment and idling adjustment have been completed. If you feel the idling is too high, please adjust the wire slightly so that the link rod does not press on the throttle. 2 horsepower boat AF boat Achilles Joycraft Rubber boat Others