Honda Outboards BF40A/BF50A Service Manual, Page 348Get this manual
BF40A-BF50A 11) Lift the left stern bracket and remove the gas assisted damper, Make sure that the tilt lever is in "RUN" position before removal
Store the gas assisted damper with fully extended position 12) Remove the 26 mm wave washer and 10 mm distance collar13) Remove the lower cylinder bushings if necessary Replace with new ones when the lower cylinder busing is removed[1 ]
_ 10 mm DISTANCE COLLAR