Honda BF35A-BF45A Outboard Motors Shop Manual., Page 422Get this manual
25)Tighten the outer tube guide to the specified torque using the lock nut wrench TORQUE: 88(9.0 kgf-m, 65 Ibf-ft)
26)Tighten the manual valve securely1I LOCK NUT WRENCH 070PA-ZW40100
27)Apply rubber grease or ATF to new oil seal.Holding the oil seal with your fingers so that it shapes "U" and install it in the groove in the outer tube taking care not to damage theoil seal28)Apply ATF to new O-ring and install it on the outer tube guide29)Apply ATF to the piston rod and install the oil tank by turning it taking care not to damage the oil seal in the oil tank30)Set the oil tank as shown and tighten the four mm socket bolts to the specified torque