Power Unit Technical Data; Power Unit; Cylinder Head Assembly - Yamaha F150B Service Manual

Power unit technical data

Power unit

Item
Cylinder
Minimum compression pres-
sure (*1)
Engine oil
Oil pressure (*2)
at 60 °C (140 °F) with SL
10W-30 engine oil and at
700 r/min
Replacement engine oil quan-
tity (at periodic maintenance)
Without oil filter replacement
With oil filter replacement
(*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" (7-2). The figures are for reference
only.

Cylinder head assembly

Item
Cylinder head
Warpage limit
Valve stem
Diameter
Intake
Exhaust
Runout limit
Intake
Exhaust
Valve stem guide
Inside diameter
Intake
Exhaust
Stem-to-guide clearance
Intake
Exhaust
Valve spring
Free length
Tilt limit
Fuel system technical data / Power unit technical data
Unit
F150B
kPa (kgf/
cm 2 , psi)
kPa (kgf/
2
cm , psi)
L (US qt,
lmp qt)
L (US qt,
lmp qt)
Unit
F150B
mm (in)
mm (in) 5.477–5.492 (0.2156–0.2162)
mm (in) 5.464–5.479 (0.2151–0.2157)
mm (in)
mm (in)
mm (in) 5.504–5.522 (0.2167–0.2174)
mm (in) 5.504–5.522 (0.2167–0.2174)
mm (in) 0.025–0.058 (0.0010–0.0023)
mm (in) 0.025–0.058 (0.0010–0.0023)
mm (in)
mm (in)
Power unit technical data
Model
FL150B
880.0 (8.80, 127.6)
450.0 (4.50, 65.3)
4.30 (4.54, 3.78)
4.50 (4.76, 3.96)
Model
FL150B
0.1 (0.0039)
0.01 (0.0004)
0.01 (0.0004)
44.2 (1.74)
1.2 (0.05)
0
1
2
3
4
5
6
7
8
9
10
A
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