Mercury MerCruiser Service Manual page 272

Engine Inspection and Assembly
5. Insert a valve spring compressor under the rocker arm nut, compress the valve spring, and remove the valve keepers.
a
a - Rocker arm nut
b - Valve spring compressor
c - Valve keepers
Description
Valve spring compressor (cylinder head on engine)
6. Carefully release the valve spring compressor.
7. Remove the valve spring cap and valve spring.
IMPORTANT: If compressed air is not available, do not turn the crankshaft while valve springs, retainers, and locks are
removed or the valves will fall into the cylinder.
8. Remove and discard the valve stem oil seal.
Page 3B-70
b
Typical valve stem oil seal
© 2016 Mercury Marine
c c
29806
SPX Part Number
J5892‑D
29807
90-8M0099748 eng DECEMBER 2015