Mercury Mariner 25HP 4-Stroke Outboard Service Manual 1997, Page 228Get this manual
3Use the (.060 wi re) removal tool (see previous page) and push out the spool and one seat4From opposite side, use punch and push out the remaining seat CleaningInspectionRepair
IMPORTANT: Components must be dirt and lint freeSlightest amount of debris in Power Trim system could cause system to malfunctionClean shock rod and components with parts cleaner and dry with compressed airIt is recommended that all a-rings in trim system be replacedUse O-Ring Kit 25-B2766BA 1Lubricate all a-rings with power trim fluid