1978 Johnson 175, 200, 235 HP Outboard Service Manual, Page 73Get this manual
REMOVAL OF POWER HEAD FROM EXHAUST HOUSING
aRemove electric starter and solenoid as described in Section 7bRemove air silencer, fuel pumps, carburetors, and intake manifold as described in Section 3cRemove flywheel, stator, timer ass embly, electrical component brackets, and ignition coils as described in Section 4d Remove cylinder heads and exhaust covers as described in paragraph "Inspect Cylinder Walls and Pistons" on page 5-5eDisconnect power head ground lead on starboard sideRemove front rubber mount screws (port and starboard)See Figure 5-14fLoosen beHcrank screw and nut sufficiently to disconnect shift rod connector from beHcrankSee Figure 5-14
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Cylinder head cover Gasket Seals Thermostat Thermostat cover Pressure valve Spring
Figure 5-13Thermostat and Pressure Valve