Yamaha F30B 2018, Руководство по обслуживанию

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7-51
Cylinder block
5. Remove:
• Piston pin clip “1”
• Piston pin “2”
• Connecting rod “3”
Checking the piston diameter
1. Measure:
• Piston outside diameter “a” (at the speci-
fied measuring point “b”)
Below specification

Replace.
Checking the cylinder bore
1. Measure:
• Cylinder bore (D1–D6) (at measuring
points “a”, “b”, and “c”, and in directions “d”
(D1, D3, D5) and “e” (D2, D4, D6))
Above specification

Replace the cylin-
der block.
1
1
2
3
a
b
Piston
Diameter
64.950–64.965 mm (2.5571–
2.5577 in)
Limit
64.910 mm (2.5555 in)
1st oversize diameter
65.200–65.215 mm (2.5669–
2.5675 in)
2nd oversize diameter
65.450–65.465 mm (2.5768–
2.5774 in)
Measuring point
5.0 mm (0.20 in)
above the bottom of the piston
skirt
a. 10.0 mm (0.39 in)
b. 48.0 mm (1.89 in)
c. 85.0 mm (3.35 in)
d. Parallel to the crankshaft
e. At a right angle to the crankshaft
Cylinder
Bore
65.000–65.015 mm (2.5591–
2.5596 in)
Limit
65.100 mm (2.5630 in)
a
b
c
d
e
D
1
D
2
D
3
D
4
D
5
D
6