1997+ Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-826148R2, Page 251Get this manual
4Secure power trim assembly in soft jaw vise5Unscrew end cap assembly from cylinder using spanner wrench 91-74951 Shock Rod Disassembly
NOTE: The only serviceable items on the shock rod assembly are the o-rings and wiper ringIf shock rod requires any other repair, replace shock rod assembly