Honda BF75 BF100 Outboards Service Manual, Page 47Get this manual
HONDABF75BF 00 SPARK ADVANCER
After assembling, pull the weight outward to be certain that the rotor turns freely in the direction of the arrowIt should return to the original position smoothly when the weight is released
ROTOR (Motors, with serial number 1200001 and subsequent) WEIGHT
ASSEMBLYInsert advancer weight heels into groove
RETAINER