Oliepomp, valve check

Oliepomp valve check; Yamaha 2 takt buitenboordmotor 20pk type 20D, 25pk type 25D - 25J - 25N - 25Q, 30pk type 30D, 40pk type 40H, 50pk type 50D, 60pk type 60F, 70pk type 70B, 80pk type 80A, 90pk type 90A. ( 6J8-13183-00-00 / 6J8131830000 / 6E9-13183-70-00 / 6E9131830000 )