Cylinder Head Disassembly - Mercury 25 EFI Service Manual

12. Remove the three cylinder head perimeter bolts located on the port side of the head.
13. Remove the eight cylinder head bolts.
14. Remove the cylinder head.
a
b

Cylinder Head Disassembly

1. Loosen all of the adjuster locknuts and turn all of the adjusting screws out several turns.
b
a
2. Remove the two rocker shaft retaining bolts.
3. Remove the oil galley cover bolt. Remove the oil galley cover.
NOTE: Note the position of the spacer at the bottom of the rocker shaft.
a
90-8M0105568 eng MARCH 2016
a -
b -
b
11491
b
© 2016 Mercury Marine
Perimeter bolts (3)
Head bolts (8)
a - Locknut
b - Adjusting screw
11518
a -
b -
c -
c
11496
Cylinder Head
Spacer
Rocker shaft retaining bolts (2)
Oil galley cover bolt
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