Knob Choke 6H4-41271 for outboard motors: compatible with 2-stroke models 9.9 , 13.5 , 15 , 25 , 40 , and 50 ; and 4-stroke models F6, F8, F9.9, FT8, and FT9.9.Also fits part numbers 6H4-41271-02, 6H4-41271-01, and 6H4-41271-00.