Rocker Arm Cover
Removal
NOTE: For some applications it may be necessary to remove the exhaust manifold before removing a rocker arm cover. Refer
to
Section 7
for exhaust manifold removal.
1.
Remove the engine wiring harness. Refer to Section 3D ‑ Engine Wiring Harness.
2. Disconnect the crankcase ventilation hoses.
3. Remove any items that interfere with the removal of the rocker arm covers.
4. Remove the rocker arm covers.
a - Rocker arm cover gasket
b - Rocker arm cover
c - Grommets
d - Screws
Rocker Arms and Valve Pushrods
Removal
NOTE: When servicing only one cylinder's rocker arms, bring that cylinder's piston up to top dead center (TDC) before
removing the rocker arms. When servicing all rocker arms, bring cylinder number 1 piston up to TDC before removing the
rocker arms.
1. Remove the rocker arms.
a - Rocker arm retaining
screw
Engine Disassembly
Page 3A-22 © 2016 Mercury Marine 90-8M0099748 eng DECEMBER 2015
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