Honda BF20A-BF25A, BF25D-BF30D Outboard Motors Shop Manual., Page 89Get this manual
HONDA BFSOAmS5A
TIMING BELT
INSTALLATION: CAUTION The valves may become bent if the cam pulley or crankshaft is rotated with the timing belt removed or incorrectly installedIf the timing marks have become substantially misaligned, it may be necessary to loosen the valve adjusting screw lock nuts and back off the valve adjusting screws before aligning the No1 cylinder timing marks
1) The spark plugs should be removed at this time2Install the cam pulley (P6-4)
111 CROWFOOT WRENCH 1-1316 (Commercially available)
3) Align the cam pulley timing marks as shown (P3-17)
I11 CAM PULLEY
CAUTION To avoid water pump impeller damage, always turn the crankshaft in clockwise direction
[2! DIRECTION
4) Install the timing belt guide plate, 16 15 mm woodruff key, and the timing pulley on the crankshaft (P6-315) Align the "0" mark on the timing pulley with the "I" mark on the cylinder block6) Install the timing belt (P3-17)NOTE When installing the timing belt, do not move the timing marks out of alignment