Yamaha F50 Service Manual

62Y3A112-8
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Oil pump
Type Trochoid
Outer rotor-to-housing 
clearancemm (in) 0.09–0.15 (0.004–0.006)
Outer rotor-to-inner rotor 
clearance limitmm (in) 0.01–0.10 (0.0004–0.0039)
Rotor-to-cover clearance mm (in) 0.03–0.08 (0.001–0.003)
Thermostats
Opening temperature°C (°F) 60 (140)
Fully open temperature°C (°F) 70 (158)
Valve open lower limit mm (in) 3.0 (0.12)
Fuel pump
Discharge L (US gal, 
Imp gal)/hr 
@ 6,000 r/min70 (18.5, 15.4)
Pressure kPa 
(kgf/cm
2, psi)49 (0.49, 7.0)
Plunger...

SPECSpecifications
2-962Y3A11
Lower unit
Electrical
Item UnitModel
USA———F50TR
Canada—F50TH—F50TR
Worldwide F50AEHD F50AEHT F50AED F50AET
Gear backlash
Pinion-to-forward gear mm (in) 0.18–0.54 (0.007–0.021)
Pinion-to-reverse gear mm (in) 0.71–1.07 (0.028–0.042)
Pinion shims mm 0.10, 0.12, 0.15, 0.18, 0.30, 0.40, 0.50
Forward gear shims mm 0.10, 0.12, 0.15, 0.18, 0.30, 0.40, 0.50
Reverse gear shims mm 0.10, 0.12, 0.15, 0.18, 0.30, 0.40, 0.50
Item UnitModel
USA———F50TR
Canada—F50TH—F50TR
Worldwide F50AEHD...

62Y3A112-10
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Ignition control system
Oil pressure switch kPa 
(kgf/cm
2, psi)50 (0.5, 7.11)
Thermoswitch (Gy/B – B)
OFF →
 ON°C (°F) 76–84 (169–183)
ON →
 OFF°C (°F) 63–77 (145–170)
Starter motor
Type Bendix
Output kW 1.1
Cranking time limit Second 30
Brushes
Standard length mm (in) 16.0 (0.63)
Wear limit mm (in) 12.0 (0.47)
Commutator
Standard diameter mm (in) 33.0 (1.30)
Wear limit mm (in) 31.0 (1.22)
Mica
Standard undercut mm (in) 0.8 (0.03)
Wear limit mm (in) 0.2 (0.01)
Charging...

SPECSpecifications
2-1162Y3A11
Power trim and tilt system
Trim sensor
Setting resistanceΩ
 9−
11
Resistance (P – B)Ω
 10–288.3
Fluid type ATF Dexron II
Brushes
Standard length mm (in) 10 (0.39)
Wear limit mm (in) 3.5 (0.14)
Commutator
Standard diameter mm (in) 22.0 (0.87)
Wear limit mm (in) 21.0 (0.83)
Mica
Standard undercut mm (in) 1.5 (0.06)Item UnitModel
USA———F50TR
Canada—F50TH—F50TR
Worldwide F50AEHD F50AEHT F50AED F50AET 

62Y3A112-12
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Power unit
Item UnitModel
USA T50TR———
Canada T50TR———
Worldwide FT50BET FT50CEHD FT50CED FT50CET
Power unit
Minimum compression 
pressure*kPa 
(kgf/cm
2, psi)840 (8.4, 119)
Lubrication oil pressure
at 55 °C (131 °F), with 
10W-30 engine oilkPa 
(kgf/cm
2, psi) 
@ 900 r/min100 (1.0, 14)
Cylinder heads
Warpage limit mm (in) 0.1 (0.004)
(lines indicate straightedge 
position)
Cylinder head journal inside 
diametermm (in) 37.00–37.02 (1.4567–1.4575)
Cylinders
Bore size mm (in)...

SPECSpecifications
2-1362Y3A11
2nd ring
Dimension B mm (in) 1.47–1.49 (0.058–0.059)
Dimension T mm (in) 2.49–2.51 (0.098–0.099)
End gap mm (in) 0.30–0.50 (0.012–0.020)
Side clearance mm (in) 0.03–0.07 (0.001–0.003)
Oil ring
Dimension B mm (in) 2.34–2.46 (0.092–0.097)
Dimension T mm (in) 2.75 (0.108)
End gap mm (in) 0.20–0.70 (0.008–0.028)
Side clearance mm (in) 0.05–0.19 (0.002–0.008)
Camshafts
Intake (A) mm (in) 30.89–30.99 (1.2161–1.2200)
Exhaust (A) mm (in) 30.82–30.92 (1.2135–1.2175)
Intake and...

62Y3A112-14
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Margin thickness (D)
Intake mm (in) 0.6–1.0 (0.024–0.039)
Exhaust mm (in) 0.7–1.1 (0.028–0.043)
Stem diameter
Intake mm (in) 5.48–5.49 (0.2157–0.2161)
Exhaust mm (in) 5.46–5.47 (0.2150–0.2153)
Guide inside diameter
Intake and exhaust mm (in) 5.50–5.51 (0.2165–0.2169)
Stem-to-guide clearance
Intake mm (in) 0.01–0.03 (0.0004–0.0012)
Exhaust mm (in) 0.03–0.05 (0.0012–0.0020)
Stem runout limit mm (in) 0.03 (0.0012)
Valve springs
Free length mm (in) 39.85 (1.569)
Minimum free...

SPECSpecifications
2-1562Y3A11
Oil pump
Type Trochoid
Outer rotor-to-housing 
clearancemm (in) 0.09–0.15 (0.004–0.006)
Outer rotor-to-inner rotor 
clearance limitmm (in) 0.01–0.10 (0.0004–0.0039)
Rotor-to-cover clearance mm (in) 0.03–0.08 (0.001–0.003)
Thermostats
Opening temperature°C (°F) 60 (140)
Fully open temperature°C (°F) 70 (158)
Valve open lower limit mm (in) 3.0 (0.12)
Fuel pump
Discharge L (US gal, 
Imp gal)/hr 
@ 6,000 r/min70 (18.5, 15.4)
Pressure kPa 
(kgf/cm
2, psi)49 (0.49, 7.0)
Plunger...

62Y3A112-16
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Lower unit
Electrical
Item UnitModel
USA T50TR———
Canada T50TR———
Worldwide FT50BET FT50CEHD FT50CED FT50CET
Gear backlash
Pinion-to-forward gear mm (in) 0.12–0.45 (0.005–0.018)
Pinion-to-reverse gear mm (in) 0.71–1.11 (0.028–0.044)
Pinion shims mm 0.10, 0.12, 0.15, 0.18, 0.30, 0.40, 0.50
Forward gear shims mm 0.10, 0.12, 0.15, 0.18, 0.30, 0.40, 0.50
Item UnitModel
USA T50TR———
Canada T50TR———
Worldwide FT50BET FT50CEHD FT50CED FT50CET
Ignition system
Ignition timing
(engine...

SPECSpecifications
2-1762Y3A11
Ignition control system
Oil pressure switch kPa 
(kgf/cm
2, psi)50 (0.5, 7.11)
Thermoswitch (Gy/B – B)
OFF →
 ON°C (°F) 76–84 (169–183)
ON →
 OFF°C (°F) 63–77 (145–170)
Starter motor
Type Bendix
Output kW 1.1
Cranking time limit Second 30
Brushes
Standard length mm (in) 16.0 (0.63)
Wear limit mm (in) 12.0 (0.47)
Commutator
Standard diameter mm (in) 33.0 (1.30)
Wear limit mm (in) 31.0 (1.22)
Mica
Standard undercut mm (in) 0.8 (0.03)
Wear limit mm (in) 0.2 (0.01)
Charging...