Mercury 25 EFI Service Manual page 243

Table of Contents
Cylinder Block/Crankcase Specifications...........................4A-2
Piston Specifications..........................................................4A-2
Cylinder Block Components...............................................4A-4
Crankshaft, Piston, And Connecting Rod Components..... 4A-6
Powerhead Removal..........................................................4A-8
Powerhead Components Removal ................................. 4A-10
Cylinder Block Disassembly.............................................4A-11
Crankcase Disassembly........................................... 4A-11
Flywheel...........................................................................4A-14
Crankshaft Drive Gear..................................................... 4A-14
Timing Belt....................................................................... 4A-14
Anode...............................................................................4A-14
90-8M0105568 eng MARCH 2016
Powerhead
Section 4A - Cylinder Block/Crankcase
Cleaning/Inspection/Repair .............................................4A-14
Measuring Cylinder Bore.......................................... 4A-14
Measuring Piston...................................................... 4A-15
Crankcase Main Bearings.........................................4A-17
Connecting Rod Oil Clearance................................. 4A-19
Cylinder Block Assembly................................................. 4A-20
Piston Installation......................................................4A-20
Crankshaft Installation.............................................. 4A-21
Thermostat and Anode Installation........................... 4A-23
Powerhead Reassembly...........................................4A-24
Powerhead Installation.....................................................4A-27
© 2016 Mercury Marine
Cylinder Block/Crankcase
Page 4A-1
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