Yamaha EF2200iS, Service Manual

Page: 88 / 162

PISTON, CONNECTING ROD, CRANKSHAFT AND CRANKCASE
3-38
1
2
3
4
5
6
7
8
9
10
EN
GIN
E
2.
Install:
• Piston ring
(into the cylinder)
TIP
Use the piston crown to level the piston ring near bottom of
cylinder “a”, where cylinder wear is lowest.
3.
Measure:
• Piston ring end gap
Out of specification

Replace the piston rings as a
set.
Piston ring
Top ring:
Side clearance:
0.04–0.08 mm (0.0016–0.0031 in)
Limit:
0.12 mm (0.0047 in)
2nd ring:
Side clearance:
0.04–0.08 mm (0.0016–0.0031 in)
Limit:
0.12 mm (0.0047 in)
a
b
b. Upper of cylinder
Top ring:
End gap (installed):
0.15–0.30 mm (0.0059–0.0118 in)
Limit:
0.55 mm (0.021 in)
2nd ring:
End gap (installed):
0.25–0.40 mm (0.0098–0.0157 in)
Limit:
0.75 mm (0.0295 in)
Oil ring:
End gap (installed):
0.20–0.70 mm (0.008–0.028 in)
Limit:
0.90 mm (0.0354 in)