1978 Johnson 175, 200, 235 HP Outboard Service Manual, Page 104Get this manual
eUsing 58 inch thinwall socket, remove cOlllltersllllk screwSee Figure 6-8fUsing 12 inch socket and short extension, remove screw from inside Of trtm tab cavitySee Figure 6-9 REMOVAL OF EXHAUST HOUSING AND ADAPTER
aRemove front to rear exhaust housing cover screws (two each port and starboard)See Figure 6-11bRemove two rear exhaust cover to lower motor cover screwsSee Figure 6-12Remove rear exhaust cover
Figure 6-9Screw Inside Trim Tab Cavity
gUsing 9 16 inch socket, remove four screws (2 each port and starboard)See Figure 6-10hRemove gearcase assembly from exhaust housing, being careful not to bend shift rodLower inner exhaust housing may come out with gearcaseSee Figure 6-25For disassembly of gearcase, see page 6-181Two each port and starboard