ENGINE
6LPA Service Manual
5-5
Specifications
12/05
© 2007 Yanmar Marine International
Valve
Valve overall length
Standard: Intake
126.85 to 127.45 mm (4.994 to 0.5.018 in.)
Exhaust
126.43 to 127.03 mm (4.977 to 5.001 in.)
Limit: Intake
126.85 mm (4.994 in.)
Exhaust
126.43 mm (4.977 in.)
Stem diameter
Intake
6.975 to 7.985 mm (0.275 to 0.314 in.)
Exhaust
6.960 to 6.975 mm (0.274 to 0.275 in.)
Stem oil clearance
Intake
0.020 to 0.055 mm (0.0008 to 0.0022 in.)
Exhaust
0.020 to 0.055 mm (0.0008 to 0.0022 in.)
Limit: Intake
0.08 mm (0.003 in.)
Limit: Exhaust
0.10 mm (0.004 in.)
Margin thickness
Standard: Intake
1.00 mm (0.040 in.)
Exhaust
1.00 mm (0.040 in.)
Limit: Intake
0.83 mm (0.033 in.)
Limit: Exhaust
0.83 mm (0.033 in.)
Valve
spring
Deviation
Limit
2.0 mm (0.080 in.)
Free Length
Limit
49.6 mm (1.952 in.)
Valve
rocker arm
and shaft
Valve rocker arm inside diameter
20.012 to 20.033 mm (0.788 to 0.789 in.)
Valve rocker arm shaft diameter
19.972 to 19.993 mm (0.786 to 0.787 in.)
Oil clearance
Standard
0.019 to 0.061 mm (0.0007 to 0.0024 in.)
Limit
0.10 mm (0.004 in.)
Item
Description
Specification