Honda BF75DK3 BF90DK4 Outboards Shop Service Manual, 2014, Page 505Get this manual
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TRIMTILT Apply ATF to new O-ring [1] and Install it on the bottom (i.enut side) of piston rod [2] Apply ATF to new O-ring [3] and Install it on the cylinder cap [4] of piston rod AApply marine grease