Yamaha F20A Service Manual page 44

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