Honda Outboards BF40A/BF50A Service Manual, Page 274Get this manual
BF40ABF50A [2] After change [3] Before change
[4] Swivel case
STEERING FRINCTION STUD INSTALLATION HOLE
[5] Tiller handle [6] Long tiller handle type added
[6)-1 LONG TILLER HANDLE
[4]-2 SWIVEL CASE