Honda BF15D BF20D Outboard Motors Shop Manual., Page 165Get this manual
8) Loosen the timing belt driven pulley mounting bolt9) Turn the crankshaft clockwise by turning the flywheel #I clockwise (in the arrow marked direction) until the "I" timing mark on the timing belt driven pulley aligns with the" mark on the cylinder head 11I TIMING BELT
Don't turn the flywheel counterclockwise or the water pump may be damage
TIMING MARK