Power Unit - Yamaha F30A Service Manual

Power unit

Item
Power unit
Minimum compression
(*1)
pressure
(*2)
Oil pressure
Cylinder head
Warpage limit
(lines indicate straightedge
position)
Cylinder head journal inside
diameter (A)
A
A
A
Camshaft
Intake and
exhaust (A)
Intake and
exhaust (B)
Camshaft journal diameter (C)
Camshaft journal diameter (D)
D
D
Camshaft runout limit
Rocker arm shaft
Outside diameter
(*1)
Measuring conditions:
Ambient temperature 20 °C (68 °F), wide open throttle, with spark plugs removed from all cylinders.
The figures are for reference only.
(*2)
For details of the checking method, see "Checking the oil pressure" (5-1).
The figures are for reference only.
67C3K11
Unit
kPa
2
(kgf/cm , psi)
kPa
2
(kgf/cm , psi)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
C
mm (in)
mm (in)
Maintenance specification
Model
F30AEHT F30AET
830 (8.3, 120.4)
210 (2.1, 30.5) at 52 °C (126 °F) with SL
10W-30 engine oil and at engine idle speed
0.10 (0.0039)
37.000–37.025 (1.4567–1.4577)
30.834–31.034 (1.2139–1.2218)
25.900–26.100 (1.0197–1.0276)
36.925–36.945 (1.4537–1.4545)
36.935–36.955 (1.4541–1.4549)
0.03 (0.0012)
15.971–15.991 (0.6288–0.6296)
F40BWHT F40BET
2-14
1
2
3
4
5
6
7
8
9