Yamaha F50A - Page 51

62Y3A11
2-8
1
2
3
4
5
6
7
8
I
Oil pump
Type Trochoid
Outer rotor-to-housing
clearance
mm (in) 0.09–0.15 (0.004–0.006)
Outer rotor-to-inner rotor
clearance limit
mm (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/min
70 (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 Unit
Model
USA ———F50TR
Canada — F50TH — F50TR
Worldwide F50AEHD F50AEHT F50AED F50AET
Maintenance specifications