Honda BF75 BF100 Outboards Service Manual, Page 46Get this manual
HONDA BF75BF 100
PULSE COl (Engine serial number 1200001 and subsequent)
CAM PULLEY
DISASSEMBLDo not hammerASSEMBLYAlign the keyway in the pulley with the woodruff key in the camshaftMake sure the pulley is seated before tightening the bolt