Yamaha F100B F100C Outboards Factory Service Manual, Page 335Get this manual
Bracket unit Symptom: Shift mechanism of the forward gear and reverse gear does not operate properly
Check the shift cable operation
Good operating condition? Yes
Check the shift cables and links of the remote control box
Check the operation of the shift rod
Good operating condition? Yes
Check the detent of the bottom cowling
Check the condition of the shift rod connection between the lower case and upper case