Honda BF8, BF9.9 and BF10 Outboard Motors Shop Manual., Page 356Get this manual
13)Turn the piston rod of the outer tubelpiston rod assembly upside down and check whether the piston rod is extended fully14)Pour fresh ATF into the cylinder and outer tube up to the top edge of the cylinder and outer tube Pour ATF up to the
[2] OUTER TUBE
[3] CYLINDER
15)lnstall the valve body on the outer tube that had been filled with ATF in 14, and tighten the valve bodyInstall the valve body with care not to spill ATF from the outer tubelpiston rod assembly