Checking The Piston Ring; Checking The Piston Ring End Gap; Checking The Piston Ring Groove - SELVA MARINE Pike 9,9 Service Manual

POWR

Checking the piston ring

1. Measure the piston ring dimensions B
and T. Replace the piston ring set if out
of specification.
a
B
T
c
T
Piston ring dimensions:
Top ring a:
B: 1.17–1.19 mm
(0.0461–0.0469 in)
T: 1.95–2.15 mm
(0.0768–0.0846 in)
2nd ring b:
B: 1.47–1.49 mm
(0.0579–0.0587 in)
T: 2.40–2.60 mm
(0.0945–0.1024 in)
Oil ring c:
B: 2.35–2.50 mm
(0.0925–0.0984 in)
T: 2.30–2.60 mm
(0.0906–0.1024 in)

Checking the piston ring end gap

1. Level the piston ring 1 in the cylinder
with a piston crown at the specified mea-
suring point a.
2. Measure the piston ring end gap b.
5-43
Power unit
b
B
T
B
S6AU5133
5
a
NOTE:
The figures are for reference only. Depend-
ing on how the parts are assembled, the
actual measurements may not be within the
specified ranges.
Piston ring end gap b (reference
data):
Top ring:
0.15–0.30 mm
(0.0059–0.0118 in)
2nd ring:
0.30–0.45 mm
(0.0118–0.0177 in)
5
Oil ring:
0.20–0.70 mm
(0.0079–0.0276 in)
Measuring point a (reference data):
10 mm (0.4 in)

Checking the piston ring groove

1. Measure
Replace the piston if out of specification.
b
the piston ring
1
S6AU5134
5
grooves.
6AU3K11