Mercury 25 EFI Service Manual page 273

Table of Contents
Cylinder Head Specifications............................................. 4B-2
Cylinder Head Components...............................................4B-4
Camshaft and Timing Belt Tensioner Components........... 4B-6
Intake and Exhaust Valve Components.............................4B-8
Cylinder Head Removal................................................... 4B-10
Cylinder Head Disassembly......................................4B-11
Cleaning and Inspection.................................................. 4B-13
Valves....................................................................... 4B-13
Valve Springs............................................................4B-14
90-8M0105568 eng MARCH 2016
Powerhead
Section 4B - Cylinder Head
Cylinder Head Reassembly............................................. 4B-16
Cylinder Head Installation................................................ 4B-19
Valve Adjustments........................................................... 4B-21
© 2016 Mercury Marine
Cylinder Head Resurfacing.......................................4B-14
Valve Guides............................................................ 4B-15
Valve Seat Reconditioning........................................4B-15
Valve Installation.......................................................4B-16
Cam and Rocker Installation.....................................4B-17
Cylinder Head
4
B
Page 4B-1