Honda BF35A-BF45A Outboard Motors Shop Manual., Page 427Get this manual
9) Hold the power trimltilt assembly upright and bring the oil level to the lower edge of the oil filler portLoosely tighten the oil hole cap 10)Move the piston rod from the fully compressed position to the fully extended position two or three times by operating the power trimltilt switch11) Push the "UP"side of the power trimhilt switch again to extend the piston rod fully12) Remove the oil cap bolt and check the oil levelIf the level is low, add ATF with syringe or equivalent tool until ATF flows out of the oil filler port:1I 31L FILLER
13) Install the new O-ring on the oil cap and tighten the oil cap to the specified torqueTORQUE: 0.8 Nm (0.08 kgf'm, 0.58 Ibfdt) 14)Wipe up ATF spilled from the cylinder compthoroughlyOperate the power trimltilt switch and check that the piston rod moves smoothly15) Check the blow pressure (P13-29)