Power Unit - Yamaha F50F Service Manual

SPEC

Power unit

Item
Power unit
Minimum compression
(*1)
pressure
(*2)
Oil pressure
Cylinder head
Warpage limit
(lines indicate straightedge
position)
Journal inside diameter
Cylinders
Bore size
Taper limit
Out-of-round limit
Pistons
Piston diameter (D)
Measuring point (H)
Piston clearance
Piston pin boss bore
Oversize piston diameter
1st
2nd
Piston pins
Outside diameter
Piston rings
Top ring
Dimension B
Dimension T
End gap
Side clearance
(*1)
Measure conditions:
Ambient temperature 20 °C (68 °F), wide open throttle, with spark plugs removed from all cylinders.
The figures are for reference only.
(*2)
The figures are for reference only.
2-11
Specifications
Unit
kPa
(kgf/cm
kPa
(kgf/cm
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
F60CEHT
2
, psi)
125 (1.25, 18.1) at engine idle speed
2
, psi)
37.000–37.025 (1.4567–1.4577)
65.000–65.015 (2.5591–2.5596)
64.950–64.965 (2.5571–2.5577)
0.035–0.065 (0.0014–0.0026)
15.974–15.985 (0.6289–0.6293)
65.200–65.215 (2.5669–2.5675)
65.450–65.465 (2.5768–2.5774)
15.965–15.970 (0.6285–0.6287)
1.17–1.19 (0.0461–0.0469)
2.30–2.50 (0.0905–0.0984)
0.15–0.30 (0.0059–0.0118)
0.02–0.06 (0.0008–0.0024)
Model
F60CET FT60DET
960 (9.6, 139.2)
0.10 (0.0039)
0.08 (0.0032)
0.05 (0.0020)
5.0 (0.20)
6C13G11