Yamaha F20A, Руководство по обслуживанию

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2-5
SPEC
E
MAINTENANCE SPECIFICATIONS
CONNECTING ROD(S)
Small end inside diameter mm (in) 15.985 ~ 15.998 (0.6293 ~ 0.6298)
Big end oil clearance mm (in) 0.020 ~ 0.052 (0.0008 ~ 0.0020)
Connecting rod inside diameter A: Blue B: Black C: Brown
CRANKSHAFT
Crankshaft outside diameter mm (in) 42.984 ~ 43.000 (1.692 ~ 1.693)
Main journal clearance mm (in) 0.012 ~ 0.044 (0.0005 ~ 0.0017)
Crankcase mark - bearing color A: Blue B: Black C: Brown
Crankshaft big end side
clearance mm (in) 0.05 ~ 0.22 (0.002 ~ 0.009)
Crankshaft journal clearance mm (in) 0.020 ~ 0.052 (0.0008 ~ 0.0020)
Runout limit mm (in) 0.03 (0.0012)
BALANCER
Balancer piston diameter mm (in) 94.893 (3.7360)
Crankcase balancer cylinder
inside diameter mm (in) 95.018 (3.7409)
Connecting rod inside diameter 68.049 (2.6791)
THERMOSTAT
Valve opening temperature ˚C (˚F) 60 (140)
Full-open temperature ˚C (˚F) 70 (158)
Valve lift mm (in) 3 (0.12)
FUEL PUMP
Discharge L (US gal, Imp gal)/ h
@6,000 r/min
70 (18.5, 15.4)
Pressure kPa (kg/cm
2
, psi) 20 ~ 40 (0.2 ~ 0.4, 3 ~ 6)
Diaphragm stroke mm (in) 3.5 ~ 5.1 (0.14 ~ 0.20)
Plunger stroke mm (in) 5.85 ~ 9.05 (0.23 ~ 0.35)
OIL PUMP
Type Trochoid
Outer rotor-to-housing clearance mm (in) 0.03 ~ 0.15 (0.001 ~ 0.006)
Outer rotor-to-inner rotor
clearance mm (in) 0.12 max. (0.005 max.)
Rotor-to-cover clearance mm (in) 0.03 ~ 0.08 (0.001 ~ 0.003)
Shaft-to-housing clearance mm (in) 0.006 ~ 0.034 (0.0002 ~ 0.0013)
Relief valve operating pressure MPa (kg/cm
2
, psi) 4.12
±
0.30 (0.0412
±
0.003, 0.5859
±
0.043)
CARBURETOR
ID mark 65W01
Main jet # 112
Main air jet # 90
Pilot jet # 50
Pilot air jet # 85
Pilot outlet jet # 52
Float height mm (in) 14.0
±
0.5 (0.55
±
0.02)
Idle speed r/min 925
±
50
Trolling speed r/min 820
±
50
Item Unit
Model
Worldwide F20A F25A
USA, CANADA — F25X