Honda BF35A-BF45A Outboard Motors Shop Manual., Page 403Get this manual
3) Remove the four mm socket bolts and remove the oil tank and motor cord bracket B[mm SOCKET BOLT (4)
4) Remove the O-ring from the cylinder Comp
Discard the O-ringReplace it with new one during reassembly
[5] MOTOR CORD BRACKET B
[2] OIL TANK
I [41 WIRE BAND CLIP (2)
5Remove the oil seal using small screw driver as shown