Yamaha F150 Service Manual Page 34

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SPEC
Specifications
2-3
63P3F11
Maintenance specification
2
Power unit
Item Unit
Model
F150AET FL150AET
Power unit
Minimum compression
pressure
(*1)
kPa
(kgf/cm
2
, psi)
880 (8.8, 128)
Lubrication oil pressure
(*2)
kPa
(kgf/cm
2
, psi)
450 (4.5, 65.3) at engine idle speed
Cylinder head
Warpage limit mm (in) 0.10 (0.0039)
(lines indicate straightedge
position)
Camshaft cap inside diameter mm (in) 25.00025.021 (0.98430.9851)
Cylinders
Bore size mm (in) 94.00094.017 (3.70083.7014)
Taper limit mm (in) 0.08 (0.0032)
Out-of-round limit mm (in) 0.05 (0.0020)
Pistons
Piston diameter (D) mm (in) 93.92893.934 (3.69793.6982)
Measuring point (H) mm (in) 5.0 (0.20)
Piston-to-cylinder clearance mm (in) 0.0750.080 (0.00300.0031)
Piston pin boss bore mm (in) 21.00421.015 (0.82690.8274)
Piston rings
Top ring
Dimension B mm (in) 1.171.19 (0.04610.0469)
Dimension T mm (in) 2.803.00 (0.11020.1181)
End gap mm (in) 0.150.30 (0.00590.0118)
Side clearance mm (in) 0.040.08 (0.00160.0031)
2nd piston ring
Dimension B mm (in) 1.171.19 (0.04610.0469)
Dimension T mm (in) 3.703.90 (0.14570.1535)
End gap mm (in) 0.300.45 (0.01180.0177)
Side clearance mm (in) 0.030.07 (0.00120.0028)
(*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.
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