Westerbeke 6.5KW Technical Manual page 31

Piston ring groove width
Top
Second
Oil scraper
Piston ring thickness
Top
Second
Oil scraper
Clearance between piston ring
and ring groove
Top
Second
Oil scraper
Wear limit
. Piston ring end gap
Top
Second
Oil scraper
Wear limit
Oversized piston rings available
6.5
& 8KW
11KW
Piston pin diameter
Interference fit in a piston pin
boss
Pressure to install piston
pin in piston pin boss
Flywheel run-out
25
1.22 - 1.24
mm
(0.048 - 0.050
in)
1.52 - 1.54
mm
(0.0598 - 0.0606
in)
4.02 - 4.04
mm
(0.1583 - 0.1591
in)
1.17 - 1.19
mm
(0.0461 - 0.0469
in)
1.47 - 1.49
mm
(0.0579 - 0.0587
in)
none given
0.03 - 0.07
mm
(0.0012 - 0.0028
in)
0.03 - 0.07
mm
(0.0012 - 0.0028
in)
none given
0.15
mm
(0.0059
in)
0.2 - 0.4
mm
(0.008 - 0.016
in)
0.2 - 0.04
mm
(0.008 - 0.016
in)
0.3 -0.9
mm
(0.012 - 0.035
in)
1.0
mm
(0.039
in)
0.25
mm
(0.010
in)
0.50
mm
(0.020
in)
0.75
mm
(0.030
in)
1.00
mm
(0.040
in)
0.25
mm
(0.010
in)
0.50
mm
(0.020
in)
19.976 - 19.988
mm
(0.7865 - 0.7869
in)
o -
0.024
mm
(0 - 0.0009
in)
500 - 1,500
kg
(1,102 - 3,307 1b)
0.20
mm
(0.008
in)