Mercury 45 Jet 50-55 - Piston Ring Installation

4-28 - POWERHEAD 90-817643R1 DECEMBER 1996
6. Install new piston pin lockrings (each side of piston) us-
ing Lockring Tool (p/n 91-77109A1).
7. Make sure lockrings are properly seated in piston
grooves.
!
CAUTION
Do not re-use piston pin lockrings. Use only new lock-
rings and make sure they are properly seated in piston
grooves.
PE-51086
a
b
a - Lockring Installation Tool (91-77109A1)
b - Lockring (2)
PE-51086
NOTE: Shaft of Lockring Installation Tool 91-77109A1
must be modified (shortened) to 1.050 in. (26.7 mm).
1.050 in. (26.7 mm)
Piston Ring Installation
IMPORTANT: Piston ring side with letter or mark must
be facing up.
Piston Ring
Piston rings are TAPERED top side, and flat (rectangular)
on the bottom side (half-keystone rings). Note that,top ring
is chromed and bottom ring is steel.
Enlarged View of
Piston Ring Grooves
!
CAUTION
Care must be taken not to scratch the side surfaces of
ring groove. Scratching this area will damage the ring
groove.