Mercury 200 OptiMax Jet Drive Service Manual page 318

IMPORTANT: The piston ring side with a dot or letter must be facing up.
a
a - Piston ring
b - Dots
c - Feeler gauge
d - Ring end gap
e - Dot or letter
f - Piston ring
Piston ring end gap
Standard bore
Oversize bore
3. Use a piston ring expander and install the piston rings with the dot side up onto the piston.
4. Verify the piston rings rotate in the ring groove.
5. Lubricate the piston and rings with 2‑Cycle Premium Outboard Oil.
Piston Ring Expander
Tube Ref No.
2-cycle Premium
14
Outboard Oil
6. Align the piston ring end gap with the locating pin.
7. Install the piston ring compressor.
Piston Ring Compressor
90-8M0050731 MAY 2011
b
c
d
a
b
Description
e
0.25 mm–0.45 mm (0.010 in.–0.018 in.)
a - Piston ring expander
b - Dot side up on piston ring
8723
91‑24697
Where Used
Piston and cylinder wall
91‑818773T
f
17260
92-858021K01
Powerhead
Part No.
Page 4A-53