Mercury 40 Service Manual page 191

3. Remove connecting rod/piston assembly from
crankshaft; re-attach caps to respective rod as
each is removed. CAPS MUST BE INSTALLED
IN SAME DIRECTION ON SAME ROD, or mat-
ing surface will not seat properly.
4. Remove main bearing sealing rings.
5. Scribe (with awl) identification number (cylinder
1, 2, and 3) on inside of piston and connecting rod
in order to reassemble piston to same connecting
rod.
1
90-852572R1 JANUARY 1998
6. Remove piston rings. Always install new piston
rings.
a - Piston Ring Expander (91-24697)
b - Piston Rings
NOTE: Cylinders must be honed for rings to seat
properly.
PE-51083
Safety glasses should be worn when removing or
installing locking rings.
7. Remove piston pin lock rings using awl. Always
install new lock rings.
PE-51081
b
CAUTION
POWERHEAD - 4-21
a
PE-51081
PE-51083