Checking The Connecting Rod Small End Inside Diameter; Checking The Connecting Rod Big End Side Clearance; Checking The Crankshaft - Yamaha F25C Service Manual

Checking the connecting rod small
end inside diameter
1. Measure the connecting rod small end
inside diameter a. Replace the connect-
ing rod if out of specification.
Connecting rod small end inside
diameter a:
15.985–15.998 mm
(0.6293–0.6298 in)
Checking the connecting rod big end
side clearance
1. Measure the connecting rod big end side
clearance a. Replace the connecting
rod or crankshaft, or both if out of specifi-
cation.
a
Connecting rod big end side
clearance a:
0.05–0.22 mm (0.0020–0.0087 in)

Checking the crankshaft

1. Measure the crankshaft journal diameter
a, crankpin diameter b, and crankpin
width c. Replace the crankshaft if out of
specification.
6D55F11
a
S6D55800
a
b
c
Crankshaft journal diameter a:
42.984–43.000 mm
(1.6923–1.6929 in)
Crankpin diameter b:
32.984–33.000 mm
(1.2986–1.2992 in)
Crankpin width c:
21.000–21.070 mm
(0.8268–0.8295 in)
2. Measure the crankshaft runout. Replace
the crankshaft if above specification.
Crankshaft runout limit:
0.05 mm (0.0020 in)
Cylinder block
1
2
S6D55810
3
4
S6D55820
5
6
7
8
S6D55830
9
5-40