Honda Outboards BF40A/BF50A Service Manual, Page 346Get this manual
BF40A-BF50A 7) In:stall the other friction disc onto the friction lever
shaft by aliqning the cutout with the boss on the swivel case and facing the disc surface toward the friction
[1] FRICTION DISC CUTOUT
8) Install the mm nylon washer, friction adjusting lever
and mm washer9) Turn the adjusting lever to the left side fully, and hold it in this position and tighten the mm self-locking nut