Yamaha F6C Service Manual

7-43
POWR
Power unit
Checking the crankshaft
1. Check the crankshaft gear a. Replace
the crankshaft if damaged or worn.
2. Measure the crankshaft journal diameter
b and c, crankpin diameter d, and
crankpin width e.
3. Measure the crankshaft runout.
Checking the connecting rod oil
clearance
1. Clean the connecting rod, connecting rod
cap, and crankpin.
2. Place a piece of Plastigauge (PG-1) onto
the crankpin a, parallel to the
crankshaft.
Connecting rod small end inside diameter
e:
15.015–15.029 mm
(0.5911–0.5917 in)
Connecting rod big end inside diameter f:
28.000–28.015 mm
(1.1024–1.1030 in)
Connecting rod cap bolt a:
1st: 6 N·m (0.6 kgf·m, 4.4 ft·lb)
2nd: 12 N·m (1.2 kgf·m, 8.9 ft·lb)
e
a
f
a
c
b
d
e
c
b
d
a
Crankshaft journal diameter (cylinder block
side) b:
24.980–24.993 mm
(0.9835–0.9840 in)
Crankshaft journal diameter (crankcase
side) c:
24.982–24.994 mm
(0.9835–0.9840 in)
Crankpin diameter d:
27.969–27.984 mm
(1.1011–1.1017 in)
Crankpin width e:
21.000–21.100 mm
(0.8268–0.8307 in)
Crankshaft runout: 0.020 mm (0.0008 in)
a

Yamaha F6C Specifications

General

Brand	Yamaha
Model	F6C
Category	Outboard Motor
Language	English