Yamaha WaveRunner Service Manual page 204

POWR
CONNECTING RODS AND PISTONS
2. Install:
• Piston ring
(into the cylinder)
NOTE:
Level the piston ring in the cylinder with the
piston crown.
a 5 mm (0.2 in)
3. Measure:
• Piston ring end gap
Out of specification → Replace the pis-
ton ring.
NOTE:
The oil ring expander spacer's end gap cannot
be measured. If the oil ring rail's gap is exces-
sive, replace all three piston rings.
Piston ring end gap:
Top ring:
0.32–0.44 mm
(0.0126–0.0173 in)
2nd ring:
0.43–0.58 mm
(0.0169–0.0228 in)
Oil ring:
0.10–0.35 mm
(0.0039–0.0138 in)
5-95
E