Honda BF15D BF20D Outboard Motors Shop Manual., Page 159Get this manual

Honda BF15D BF20D Outboard Motors Shop Manual., Page 159

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6) Hold the crankshaft using the crankshaft holder as shown and loosen the 30 mm lock nut 7 Remove the 30 mm lock nut, timing belt drive pulley, guide plates and woodruff key8) Remove the 20 mm flange