Mariner 70 Service Manual page 143

IMPORTANT: On some engines, BOTH the piston
rod and rod cap bolt holes are threaded. The rod
cap and rod must be aligned and held tight togeth-
er when threading in rod cap bolts. Check mating
surfaces to be sure that they are tight together af-
ter bolt enters the threads in the piston rod.
16. Remove main bearing sealing rings - 2 per center
main journal.
17. Using an awl, scribe identification number of con-
necting rod on inside of piston. Reassemble pis-
ton on same connecting rod.
a
a - Scribe Mark
90-13645--2 495
18. Use piston ring expander (91-24697) to remove
piston rings. Always install new piston rings.
NOTE: Cylinders must be honed in order for new rings
to seat properly.
b
a - Piston Ring Expander (P/N 91-24697)
b - Piston Rings
Eye protection MUST BE worn while removing
piston pin lockrings from piston.
19. Using an awl, remove piston pin lockrings (a) from
51083
both ends of piston pin. Never re-use piston pin
lockpins. Hold shop cloth over lockring area when
snapping out lockrings.
20. Support piston and tap out piston pin (a), using
17770
service tool (b) 91-74607A2, as shown.
a - Piston Pin
b - Wrist Pin Tool (91-74607A2)
POWERHEAD
a
CAUTION
a
b
51081
51083
a
51086
4A-15