Maintenance Specifications; Power Unit - Yamaha F15B Service Manual

SPEC

Maintenance specifications

Power unit

Item
Power unit
Minimum compression
pressure (*1)
Lubrication oil pressure (*2)
at idle speed
Cylinder head
Warpage limit
(lines indicate straightedge
position)
Camshaft journal inside diameter
Cylinder
Bore size
Wear limit
Taper limit
Out-of-round limit
Pistons
Piston diameter (D)
Measuring point (H)
Piston-to-cylinder clearance
Piston pin boss bore
Oversize piston diameter
1 st
2 nd
Piston pins
Outside diameter
Piston rings
Top ring
Dimension B
Dimension T
End gap
Side clearance
Over size
1 st
2 nd
(*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.
Since this outboard motor is equipped with an automatic decompression mechanism, accurate data may be difficult
to obtain due to differences in the way the starter rope is pulled.
(*2)
The figures are for reference only.
2-3
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)
mm (in)
mm (in)
mm (in)
F15BMH
2 , psi)
2 , psi)
35.000–35.012 (1.3780–1.3784)
59.000–59.015 (2.3228–2.3234)
58.950–58.965 (2.3209–2.3215)
0.035–0.065 (0.0014–0.0026)
14.004–14.015 (0.5513–0.5518)
13.996–14.000 (0.5510–0.5512)
1.17–1.19 (0.0461–0.0469)
2.00–2.20 (0.0787–0.0866)
0.15–0.30 (0.0059–0.0118)
0.04–0.08 (0.0016–0.0032)
Model
F15BM
765 (7.8, 111)
330 (3.36, 48)
0.10 (0.0039)
59.1 (2.33)
0.08 (0.0032)
0.05 (0.0020)
5.0 (0.20)
59.2 (2.33)
59.5 (2.34)
59.25 (2.33)
59.50 (2.34)
6D45F11