Yamaha F25 - Lower Unit Technical Data

1-19
SPEC
Specification
Lower unit technical data
Lower unit assembly
Crankcase
Crankshaft journal oil
clearance
mm (in) 0.012–0.036 (0.0005–0.0014)
(*1) The figures are for reference only.
Item Unit
Model
F25MHA
F25EHA
Lower unit
Holding pressure
kPa
(kgf/cm
2
,
psi)
98.1 (0.981, 14.2)
Pinion-to-forward gear
Backlash (*1) mm (in) 0.30–0.73 (0.0118–0.0287)
Pinion-to-reverse gear
Backlash (*1) mm (in) 0.92–1.65 (0.0362–0.0650)
Pinion shim (T3) mm 0.7, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6
Forward gear shim (T1) mm 1.0, 1.1, 1.2, 1.3, 1.4
Reverse gear shim (T2) mm 1.0, 1.1, 1.2, 1.3
Propeller shaft
Runout mm (in) 0.02 (0.0008)
Drive shaft
Runout mm (in) 0.5 (0.0197)
Item Unit
Model
F25EA
F25A T25A
Lower unit
Holding pressure
kPa
(kgf/cm
2
,
psi)
98.1 (0.981, 14.2)
68.6
(0.686, 9.9)
Pinion-to-forward gear
Backlash (*1) mm (in) 0.30–0.73 (0.0118–0.0287)
0.22–0.69
(0.0087–
0.0272)
Pinion-to-reverse gear
Backlash (*1) mm (in) 0.92–1.65 (0.0362–0.0650)
0.90–1.37
(0.0354–
0.0539)
Item Unit
Model
F25EA
F25A T25A