SERVICE STANDARDS
Service Standards
14-8
6LY3 Service Manual
© 2007 Yanmar Marine International
Piston Ring
Inspection Item
Standard
Limit
Reference Page
Top Ring
Ring Groove Width
2. 626-2.646 mm
(0.1033-0.1041 in.)
2.746 mm
(0.1081 in.)
5-38
Ring Width
2.470-2.490 mm
(0.0972-0.0980 in.)
2.450 mm
(0.0964 in.)
Side Clearance
0.136-0.176 mm
(0.0053-0.0069 in.)
0.250 mm
(0.0098 in.)
Gap
0.30-0.50 mm
(0.0118-0.0196 in.)
1.5 mm
(0.0590 in.)
Second Ring
Ring Groove Width
2.570-2.585 mm
(0.1082-0.1017 in.)
2.140 mm
(0.0842 in.)
Ring Width
2.470-2.490 mm
(0.0972-0.0980 in.)
1.950 mm
(0.0767 in.)
Side Clearance
0.080-0.115 mm
(0.0031-0.0045 in.)
0.200 mm
(0.0078 in.)
Gap
0.50-0.70 mm
(0.0196-0.0275 in.)
1.5 mm
(0.0590 in.)
Oil Ring
Ring Groove Width
4.010-4.025 mm
(0.1578-0.1584 in.)
4.130 mm
(0.1625 in.)
Ring Width
3.970-3.990 mm
(0.1562-0.1570 in.)
3.950 mm
(0.1555 in.)
Side Clearance
0.020-0.055 mm
(0.0007-0.0021 in.)
0.150 mm
(0.0059 in.)
Gap
0.25-0.45 mm
(0.0098-0.0177 in.)
1.5 mm
(0.0590 in.)
