Yamaha F50 Service Manual
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62Y3A112-8 1 2 3 4 5 6 7 8 I 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 stroke mm (in) 5.85–9.05 (0.23–0.35) Carburetor ID mark (USA and Canada) 62Y40 ID mark (worldwide) 62Y30 Main jet # #1: 124, #2: 126, #3: 116, #4: 114 Pilot jet # 39 Pilot screw turns out #1–#3: 2 1/4 ± 1/2, #4: 2 1/2 ± 1/2 Float height mm (in) 10.0 ± 0.5 (0.39 ± 0.02) Engine idle speed r/min 750 ± 50 (950 ± 50) Item UnitModel USA———F50TR Canada—F50TH—F50TR Worldwide F50AEHD F50AEHT F50AED F50AET Maintenance specifications
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 F50AEHT F50AED F50AET Ignition system Ignition timing (engine idle speed) Degree TDC ± 1.5 Charge coil output peak voltage (L – Br) @ cranking 1 (*1) V 144 @ cranking 2 (*1) V 137 @ 1,500 r/min V 169 @ 3,500 r/min V 129 Charge coil resistance (*2) (L – Br)Ω 272–408 Pulser coil output peak voltage (W/R – W/B) @ cranking 1 (*1) V6.3 @ cranking 2 (*1) V3.5 @ 1,500 r/min V 7.4 @ 3,500 r/min V 11.2 Pulser coil resistance (*2) (W/R – W/B)Ω 396–594 CDI unit output peak voltage (B/O – B, B/W – B) @ cranking 1 (*1) V 126 @ cranking 2 (*1) V 150 @ 1,500 r/min V 151 @ 3,500 r/min V 116 Spark plug gap mm (in) 0.9 (0.035) (*1)Cranking 1: unloaded Cranking 2: loaded (*2)The figures are for reference only.
62Y3A112-10 1 2 3 4 5 6 7 8 I 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 system Fuse A 20 Lighting coil output peak voltage (G – G) @ cranking (*1) V 11.9 @ 1,500 r/min (*1) V42 @ 3,500 r/min (*1) V 127 Lighting coil resistance (*2) (G – G)Ω 1.2–1.8 Rectifier Regulator output peak voltage (R – B) @ 1,500 r/min (*1) V 18.9 @ 3,500 r/min (*1) V 19.5 Charging current A @ 5,000 r/min10 Enrichment control system Prime Start Plunger projection extended minimum length a mm (in) 24.6 (0.97) (*1)Unloaded (*2)The figures are for reference only.Item UnitModel USA———F50TR Canada—F50TH—F50TR Worldwide F50AEHD F50AEHT F50AED F50AET Maintenance specifications
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 1 2 3 4 5 6 7 8 I 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) 63.00–63.01 (2.480–2.481) Taper limit mm (in) 0.08 (0.003) Out-of-round limit mm (in) 0.05 (0.002) Pistons Piston diameter (D) mm (in) 62.95–62.96 (2.478–2.479) Measuring point (H) mm (in) 5 (0.2) Piston-to-cylinder clearance mm (in) 0.04–0.06 (0.0016–0.0024) Oversize piston diameter 1st mm (in) + 0.25 (0.01) 2nd mm (in) + 0.50 (0.02) Piston pins Outside diameter mm (in) 15.965–15.970 (0.6285–0.6287) Piston rings Top ring Dimension B mm (in) 1.17–1.19 (0.046–0.047) Dimension T mm (in) 2.39–2.41 (0.094–0.095) End gap mm (in) 0.15–0.30 (0.006–0.012) Side clearance mm (in) 0.04–0.08 (0.0016–0.003) * Measuring conditions: Ambient temperature 20 °C (68 °F), wide open throttle, with plugs disconnected from all cylinders. The figures are for reference only. Maintenance specifications
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 exhaust (B)mm (in) 25.95–26.05 (1.0217–1.0256) Camshaft journal diameter #1 mm (in) 36.93–36.94 (1.4539–1.4543) #2, #3, #4 mm (in) 36.94–36.95 (1.4543–1.4547) Camshaft journal oil clearance #1 mm (in) 0.055–0.100 (0.0022–0.0039) #2, #3, #4 mm (in) 0.045–0.090 (0.0018–0.0035) Maximum camshaft runout mm (in) 0.04 (0.0016) Rocker arm shafts Outside diameter mm (in) 15.98–15.99 (0.6291–0.6295) Rocker arms Inside diameter mm (in) 16.00–16.01 (0.6299–0.6303) Valves Valve clearance (cold) Intake mm (in) 0.20 ± 0.05 (0.008 ± 0.002) Exhaust mm (in) 0.30 ± 0.05 (0.012 ± 0.002) Head diameter (A) Intake mm (in) 29.9–30.1 (1.177–1.185) Exhaust mm (in) 25.9–26.1 (1.020–1.027) Face width (B) Intake mm (in) 1.84–2.97 (0.072–0.117) Exhaust mm (in) 1.98–3.11 (0.078–0.122) Seat contact width (C) Intake mm (in) 0.9–1.1 (0.035–0.043) Exhaust mm (in) 0.9–1.1 (0.035–0.043) Item UnitModel USA T50TR——— Canada T50TR——— Worldwide FT50BET FT50CEHD FT50CED FT50CET
62Y3A112-14 1 2 3 4 5 6 7 8 I 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 length mm (in) 37.85 (1.490) Tilt limit mm (in) 1.7 (0.07) Connecting rods Small-end inside diameter mm (in) 15.985–15.998 (0.6293–0.6298) Big-end inside diameter mm (in) 36.000–36.024 (1.4173–1.4183) Crank pin oil clearance mm (in) 0.016–0.040 (0.0006–0.0015) Big-end bearing thickness Yellow mm (in) 1.500–1.504 (0.0591–0.0592) Red mm (in) 1.496–1.500 (0.0589–0.0591) Pink mm (in) 1.492–1.496 (0.0587–0.0589) Green mm (in) 1.488–1.492 (0.0586–0.0587) Crankshaft Crankshaft journal Diameter mm (in) 42.984–43.000 (1.6923–1.6929) Crankshaft pin Diameter mm (in) 32.984–33.000 (1.2986–1.2992) Runout limit mm (in) 0.04 (0.0016) Crankcase Crankcase main journal inside diametermm (in) 46.000–46.024 (1.8110–1.8120) Crankshaft main journal oil clearancemm (in) 0.012–0.036 (0.0005–0.0014) Crankcase main journal bearing thickness Yellow mm (in) 1.502–1.506 (0.0591–0.0593) Red mm (in) 1.498–1.502 (0.0590–0.0591) Pink mm (in) 1.494–1.498 (0.0588–0.0590) Green mm (in) 1.490–1.494 (0.0587–0.0588) Item UnitModel USA T50TR——— Canada T50TR——— Worldwide FT50BET FT50CEHD FT50CED FT50CET Maintenance specifications
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 stroke mm (in) 5.85–9.05 (0.23–0.35) Carburetor ID mark (USA and Canada) 62Y40— ID mark (worldwide) 62Y30 62Y30, 62Y50 (for Brazil) Main jet # #1: 124, #2: 126, #3: 116, #4: 114 Pilot jet # 35, 39 Pilot screw turns out #1–#3: 2 1/4 ± 1/2, #4: 2 1/2 ± 1/2 Float height mm (in) 10.0 ± 0.5 (0.39 ± 0.02) Engine idle speed r/min 750 ± 50 (950 ± 50) Item UnitModel USA T50TR——— Canada T50TR——— Worldwide FT50BET FT50CEHD FT50CED FT50CET
62Y3A112-16 1 2 3 4 5 6 7 8 I 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 idle speed) Degree TDC ± 1.5 Charge coil output peak voltage (L – Br) @ cranking 1 (*1) V 144 @ cranking 2 (*1) V 137 @ 1,500 r/min V 169 @ 3,500 r/min V 129 Charge coil resistance (*2) (L – Br)Ω 272–408 Pulser coil output peak voltage (W/R – W/B) @ cranking 1 (*1) V6.3 @ cranking 2 (*1) V3.5 @ 1,500 r/min V 7.4 @ 3,500 r/min V 11.2 Pulser coil resistance (*2) (W/R – W/B)Ω 396–594 CDI unit output peak voltage (B/O – B, B/W – B) @ cranking 1 (*1) V 126 @ cranking 2 (*1) V 150 @ 1,500 r/min V 151 @ 3,500 r/min V 116 Spark plug gap mm (in) 0.9 (0.035) (*1)Cranking 1: unloaded Cranking 2: loaded (*2)The figures are for reference only. Maintenance specifications
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 system Fuse A 20 Lighting coil output peak voltage (G – G) @ cranking (*1) V 11.9 @ 1,500 r/min (*1) V42 @ 3,500 r/min (*1) V 127 Lighting coil resistance (*2) (G – G)Ω 1.2–1.8 Rectifier Regulator output peak voltage (R – B) @ 1,500 r/min (*1) V 18.9 @ 3,500 r/min (*1) V 19.5 Charging current A @ 5,000 r/min10 Enrichment control system Prime Start Plunger projection extended minimum length a mm (in) 24.6 (0.97) (*1)Unloaded (*2)The figures are for reference only.Item UnitModel USA T50TR——— Canada T50TR——— Worldwide FT50BET FT50CEHD FT50CED FT50CET