1985 OMC 65, 100 and 155 HP Models Commercial Service Manual, PN 507450-D, Page 261Get this manual
Disassembly of Exhaust Housing and Adaptor100 o require service or rep Iacement, remove he gearcaseI swivel bracket or steering arm and pivot shaft assembly
Powerhead and exhaust housings can then be removed in one unit by removing upper mount screws and lower mount screwsRemove two front rubber mount screws Remove screws to separate adaptor and inner exhaust housing assembly from outer exhaust housingRemove inner exhaust housing and adaptor assembly from outer exhaust housing1