Yamaha F4B, Service Manual

Page: 26 / 202

1-9
SPEC
Specification
(*1) The figures are for reference only.
Lower unit technical data
Lower unit assembly
Connecting rod
Small end inside diameter mm (in) 15.015–15.029 (0.5911–0.5917)
Big end inside diameter mm (in) 28.000–28.015 (1.1024–1.1030)
Oil clearance mm (in) 0.016–0.046 (0.0006–0.0018)
Crankshaft
Runout mm (in) 0.020 (0.0008)
Journal diameter (cylinder
block side)
mm (in) 24.980–24.993 (0.9835–0.9840)
Journal diameter (crankcase
side)
mm (in) 24.982–24.994 (0.9835–0.9840)
Crankpin diameter mm (in) 27.969–27.984 (1.1011–1.1017)
Crankpin width mm (in) 21.000–21.100 (0.8268–0.8307)
Valve lifter
Outside diameter mm (in) 7.965–7.980 (0.3136–0.3142)
Item Unit
Model
F4BMH F5AMH F6CMH
Lower unit
Holding pressure
kPa (kgf/
cm
2
, psi)
98.0 (0.98, 14.2)
Propeller shaft
Runout mm (in) 0.02 (0.001)
Drive shaft
Runout mm (in) 0.4 (0.02)
Item Unit
Model
F4BMH F5AMH F6CMH