Piston Disassembly; Powerhead Cleaning, Inspection, And Repair; Flywheel - Mercury 15 EFI FourStroke Service Manual

Cylinder Block/Crankcase
9. Remove the main bearings from the cylinder block and crankcase cover.

Piston Disassembly

IMPORTANT: Disassemble each piston separately to ensure the components will not be intermixed. After disassembly, place
the components into a container that identifies the cylinder location.
1. Remove the piston pin clips, and piston pin. Separate the connecting rod from the piston.
2. Use a piston ring expander to remove the top ring and the second ring.
3. Use a piston ring expander to remove the oil ring top scraper, bottom scraper, and the oil control ring.
Piston Ring Expander

Powerhead Cleaning, Inspection, and Repair

Flywheel

Inspect the flywheel keyway and teeth. Replace if damaged or worn.
Page 4A-16
b
a
e
© 2018 Mercury Marine
c
a - Oil rings
b - Second ring
c - Top ring
d - Piston pin
e - Piston pin clip (2)
d
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90-8M0125265 eng NOVEMBER 2017
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