Checking The Connecting Rod Big End Side Clearance; Checking The Crankshaft - Yamaha F30B 2018 Service Manual

b. Measure the connecting rod small end in-
side diameter "a" and big end inside diam-
eter "b".
b
1
Connecting rod bolt "1"
1st: 6 N·m (0.6 kgf·m, 4.4 lb·ft)
2nd: 17 N·m (1.7 kgf·m, 13 lb·ft)
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Checking the connecting rod big end
side clearance
1. Measure:
• Connecting rod big end side clearance "a"
Above specification  Check the crank-
shaft pin width.
See "Checking the crankshaft" (7-55).
a
Big end side clearance
0.050–0.220
0.0087 in)
Limit
0.27 mm (0.0106 in)

Checking the crankshaft

1. Measure:
• Crankshaft journal diameters "a", crank-
shaft pin diameters "b", and crankshaft pin
widths "c"
Out of specification  Replace.
a
a
mm (0.0020–
7-55
a
Journal diameter
42.984–43.000
1.6929 in)
Crankshaft pin diameter
32.984–33.000
1.2992 in)
Crankshaft pin width
21.00–21.07
0.8295 in)
2. Measure:
• Runout
Above specification  Replace.
Crankshaft
Runout
0.03 mm (0.0012 in)
Limit
0.04 mm (0.0016 in)
Cylinder block
b
c
mm (1.6923–
mm (1.2986–
mm (0.8268–