SELVA MARINE Dorado 50 EFI, Service Manual

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6C13G11
5-40
1
2
3
4
5
6
7
8
9
2. Level the piston ring
1
in the cylinder
with a piston crown.
3. Check the piston ring end gap
d
at the
specified measuring point. Replace if out
of specification.
Checking the piston ring grooves
1. Measure the piston ring grooves.
Replace the piston if out of specification.
Piston ring dimensions:
Top ring
a
:
B: 1.17 – 1.19 mm
(0.0461 – 0.0469 in)
T: 2.30 – 2.50 mm
(0.0905 – 0.0984 in)
2nd ring
b
:
B: 1.47 – 1.49 mm
(0.0579 – 0.0587 in)
T: 2.60 – 2.80 mm
(0.1024 – 0.1102 in)
Oil ring
c
:
B: 2.36 – 2.48 mm
(0.0929 – 0.0976 in)
T: (reference data)
2.75 mm (0.1083 in)
Piston ring end gap
d
:
Top ring:
0.15 – 0.30 mm
(0.0059 – 0.0118 in)
2nd ring:
0.30 – 0.50 mm
(0.0118 – 0.0197 in)
Oil ring:
0.20 – 0.70 mm
(0.0079 – 0.0276 in)
Measuring point
e
: 20 mm (0.8 in)
Piston ring groove:
Top ring
a
:
1.21 – 1.23 mm
(0.0476 – 0.0484 in)
2nd ring
b
:
1.51 – 1.53 mm
(0.0594 – 0.0602 in)
Oil ring
c
:
2.52 – 2.54 mm
(0.0992 – 0.1000 in)
Cylinder block