1978 Johnson 55 HP Outboards Service Manual, Page 79Get this manual
REMOVAL OF EXHAUST HOUSING AND ADAPTER aRemove power headSee Section for instructionsbRemove gearcase as described in "Removal of Gearcase cThe exhaust housing and adapter assembly, which carries the power head, is rubber mounted to the swivel bracket assemblyTo release the exhaust housing, remove port and starboard lower mount coversSee Figure 6-10Remove rubber mount screws, two each port and starboardSee Fig'ure 6-7Remove three upper mount screws (see Figure 6-7) and remove exhaust housing and adapter assemblySee Figure 6-853182
UPPER MOUNT SCREWS
Figure 6- 8Removing Exhaust Housing