1997+ Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-826148R2, Page 264Get this manual
Shock Rod Installation 1Place trim cylinder in soft jawed vice2Install lubricated o-ring to memory piston and place into cylinderPush memory piston all the way to bottom
Manual Release Valve Installation
1Install "E" clip (if removed) and lubricate O-Rings with power trim fluid2Insert manual release valve into manifold and tighten securely
aMemory PistonO-ring
3Fill cylinder three inches (76.2mm) from top of cylinder using Dexron III, (ATF) automatic transmission fluidIf not available, use Quicksilver Power Trim and Steering Fluid4Install shock rod into cylinder until power trim fluid flows through oil blow off ball passageFill remaining cylinder to just below the cylinder threads
Bleeding Power Trim Unit
1Secure power trim unit in soft jawed vise2Remove reservoir plugAdd power trim fluid until its even with the bottom of the fill holeReinstall plug3Close the manual release valve(Turn full clockwise)