Yamaha WaveRunner FX Cruiser SHO, Service Manual

Page: 227 / 433

5-102
E
POWR
1
2
3
4
5
6
7
8
9
Piston ring check
1. Measure:
• Piston ring dimensions B and T
Out of specification
→
Replace the pis-
ton rings as a set.
Piston ring dimensions:
Top ring
a
:
B: 1.17 – 1.19 mm
(0.0461 – 0.0469 in)
T: 2.85 – 3.05 mm
(0.112 – 0.120 in)
2nd ring
b
:
B: 1.17 – 1.19 mm
(0.0461 – 0.0469 in)
T: 2.60 – 2.80 mm
(0.102 – 0.110 in)
Oil ring
c
:
B: 2.37 – 2.47 mm
(0.093 – 0.097 in)
T (reference data):
2.50 mm (0.098 in)
c
B
T
T
B
b a
T
B
2. Measure:
• Piston ring end gap
a
Piston ring end gap
a
(reference data):
Top ring:
0.30 – 0.45 mm (0.012 – 0.018 in)
2nd ring:
0.45 – 0.60 mm (0.018 – 0.024 in)
Oil ring:
0.10 – 0.35 mm (0.004 – 0.014 in)
Measuring point
b
:
5 mm (0.2 in)
a
b
Crankcase, connecting rod, and piston