Mercury 40 Service Manual page 206

CYLINDER HEAD
Valve Clearance Adjustment
NOTE: Valves should be adjusted when engine is cold.
Engine could possibly start when turning flywheel during adjustment. To prevent
this type of accidental engine starting and possible serious injury, always remove
spark plug leads from spark plugs.
Cylinder Head Cover Removal
1. Disconnect the breather hose and vent hose.
2. Remove fuel pump assembly.
a -
b -
c -
3. Remove cylinder head cover.
a -
b -
c -
Page 4A-10
a
b
Fuel Pump Assembly
Vent Hose
Breather Hose
c
b
a
Cylinder Head Cover
Bolts (7)
Harness Retainer
WARNING
c
53726
53734
90-828631R3 MARCH 1999