Honda Outboards BF40A/BF50A Service Manual, Page 62Get this manual
HONDABF3!5A-4SA 4) Remove the flywheel and 10 mm dowel pin
[2) FLYWHEEL
(1] 12 mm-_ DOWEL PIN
5) Disconnect the exciter coil and charging coil
EXCITER_ COIL
(2J"- CHARGING COIL
6) Loosen the 10 38 mm flange bolt which is tightening the timing belt tensionerthen retighten the 10 38 mm flange bolt while pushing the belt tensioner in the direction of the arrowCAunON