Mercury Mariner V-250 V-275 Outboard Service Shop Manual 1990, Page 245Get this manual
Reverse Gear REM OVALJDISASSEMBLY
Remove reverse gear bearing adapter and shims using tools as shownMeasure shim thickness for future reference
IMPORTANT: Reverse gear can be removed from gear
housing only after drive shaft and pinion gear have been removed12Remove reverse gear
Remove thrust bearing and thrust washer
50760 a801l(91 -31229)Guide Plate (91-616243)Nut (11-24156)Jaws(91-S16242)Puller Head [From Slide Hammer Puller Kit (91-34569Al)J
a Reverse GearThrusl Bearing Thrusl Washer
NOTE: Cautiously applying heat to both sides of gearcase
where reverse gear bearing adaptor is located will aid in removal of bearing adaptor assembly