Yanmar 3YM30 Sevice Manual page 221

Marine diesel engine
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13. Service standards
3YM20
Inspection item
Top ring
Groove width
Ring width
Side clearance
Ring gap
Second ring
Groove width
Ring width
Side clearance
Ring gap
Oil ring
Groove width
Ring width
Side clearance
Ring gap
(5) Connecting rod
1) Rod big end
Inspection item
Side clearance
2) Rod small end
Item
Bushing inside diameter
Pin outside diameter
Clearance
Standard
1.550-1.570
1.470-1.490
0.060-0.100
0.15-0.30
1.540-1.560
1.470-1.490
0.050-0.090
0.18-0.33
3.010-3.030
2.970-3.010
0.020-0.060
0.20-0.45
Standard
0.20-0.40
Standard
22.025-22.038
21.991-22.000
0.025-0.047
206
Reference
Limit
page
-
1.450
-
0.390
1.660
1.450
5.3.3(1)
0.210
0.420
3.130
2.950
0.180
0.540
Reference
Limit
page
0.55
5.4.1(2)
Reference
Limit
page
22.068
21.963
5.4.3(1)
0.105
mm
mm
mm

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