Mercury Mariner Outboard 225 3 Litre Service Manual 1994, Page 176Get this manual
6Remove bolts securing exhaust adaptor plate to drive shaft housing 89
Remove bolls securing water tube to adaptor plate and remove tubeRemove bolts securing exhaust tube to adaptor plaleRemove tube
a Bolts Adaptor Plate
7Lift adaptor plate off housing
a Bolts Exhaust Tube Water Tube