Mercury Mariner V-250 V-275 Outboard Service Shop Manual 1990, Page 165Get this manual
Drive Shaft Housing and Dyna-Float Suspension REMOVAL and DISASSEMBLY Refer toPowerhead Removal" In Section and Remove PowerheadRefer toLower Unit Removal" In this Section and Remove Lower Unit
5Remove lower mount retainers
1Remove upper mount nuts, meta washers, and nylon washers2Remove gasket
aower Mount Retainer
bBolt and lockwasherGround Cable (One Side Only)
6Remove rubber cap from each lower mount bolt7Remove lower mount nutsabcdNut Metal Washer Nylon Washer Gasket