Yamaha F75F - Bracket Unit Technical Data; Lower Unit Technical Data

A-6
Model
F75FEHT F75FET F100GEHT F100GET
Limit 18.035 mm (0.7100 in)
Pin outside diameter 17.991–18.000 mm (0.7083–0.7087 in)
Limit 17.981 mm (0.7079 in)
Piston ring (Top)
Type Barrel
Height (B) 1.170–1.190 mm (0.0461–0.0469 in)
Width (T) 2.400–2.600 mm (0.0945–0.1024 in)
End gap 0.15–0.30 mm (0.0059–0.0118 in)
Limit 0.470 mm (0.0185 in)
Side clearance 0.04–0.08 mm (0.0016–0.0032 in)
Limit 0.130 mm (0.0051 in)
Piston ring (2nd)
Type Taper
Height (B) 1.170–1.190 mm (0.0461–0.0469 in)
Width (T) 2.600–2.800 mm (0.1024–0.1102 in)
End gap 0.70–0.90 mm (0.0276–0.0354 in)
Limit 1.050 mm (0.0413 in)
Side clearance 0.03–0.07 mm (0.0012–0.0028 in)
Limit 0.110 mm (0.0043 in)
Piston ring (Oil)
Height (B) 2.380–2.480 mm (0.0937–0.0976 in)
Width (T) 2.400 mm (0.0945 in)
End gap 0.20–0.70 mm (0.0079–0.0276 in)
Side clearance 0.03–0.15 mm (0.0012–0.0059 in)
Connecting rod
Small end inside diame-
ter
18.005–18.018 mm (0.7089–0.7094 in)
Big end inside diameter 50.025–50.045 mm (1.9695–1.9703 in)
Big end side clearance 0.150–0.300 mm (0.0059–0.0118 in)
Limit 0.35 mm (0.0138 in)
Big end oil clearance 0.017–0.040 mm (0.0007–0.0016 in)
Limit 0.070 mm (0.0028 in)
Crankshaft
Journal diameter 51.980–52.000 mm (2.0465–2.0472 in)
Crankshaft pin diameter 46.980–47.000 mm (1.8496–1.8504 in)
Runout 0.03 mm (0.0012 in)
Limit 0.04 mm (0.0016 in)
Model F75FEHT F75FET F100GEHT F100GET
Crankshaft pin width 21.00–21.10 mm (0.8268–0.8307 in)
Journal oil clearance 0.026–0.050 mm (0.0010–0.0020 in)
Limit 0.070 mm (0.0028 in)
Lower unit technical data
Lower unit assembly
Lower unit
Holding pressure 68.6 kPa (0.69 kgf/cm², 9.9 psi)
Gear backlash
Forward gear backlash 0.15–0.88 mm (0.0059–0.0346 in)
Reverse gear backlash 0.74–1.57 mm (0.0291–0.0618 in)
* Figures obtained using the special service tools.
Available shim thicknesses
Pinion shims 0.10/0.12/0.15/0.18/0.30/0.40/0.50 mm
Forward shims 0.10/0.12/0.15/0.18/0.30/0.40/0.50 mm
Reverse shims 0.10/0.12/0.15/0.18/0.30/0.40/0.50 mm
Propeller shaft
Runout 0.02 mm (0.0008 in)
Drive shaft
Runout 1.0 mm (0.039 in)
Bracket unit technical data
PTT system
Hydraulic pressure
Up 12.50 Mpa (125.0 kgf/cm², 1812.5 psi)
Down 3.00 Mpa (30.0 kgf/cm², 435.0 psi)
Motor
Standard commutator
diameter
22.00 mm (0.8661 in)
Wear limit 21.00 mm (0.8268 in)
Standard commutator
undercut
1.50 mm (0.0591 in)
Wear limit 1.00 mm (0.0394 in)
Standard brush length 10.00 mm (0.3937 in)
Wear limit 3.5 mm (0.14 in)
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