Fuel System - Yamaha F30A Service Manual

Item
Crankshaft
Crankshaft journal diameter
Crankpin diameter
Crankpin width
Crankshaft runout limit
Crankcase
Crankshaft journal oil
(*1)
clearance
Upper and lower crankcase
main journal bearing thickness
A - (Blue)
B - (Black)
C - (Brown)
Oil pump
Type
Relief valve opening pressure
Thermostat
Opening temperature
at 0.05 mm (0.0020 in)
Fully open temperature
Valve open lower limit
Manual starter
Starter rope length
Starter rope extended length
(*1)
The figures are for reference only.

Fuel system

Item
Carburetor
ID mark
(For Europe)
(For Oceania)
Float height
Valve seat size
Main jet (M.J.)
Main nozzle (M.N.)
Pilot jet (P.J.)
(For Europe)
(For Oceania)
Pilot screw (P.S.)
Engine idle speed
67C3K11
Unit
F30AMHD F40BMHD F40BWHD
mm (in) 42.984–43.000 (1.6923–1.6929)
mm (in) 32.984–33.000 (1.2986–1.2992)
mm (in) 21.000–21.070 (0.8268–0.8295)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
kPa 389–451 (3.89–4.51, 56.4–65.4)
2
(kgf/cm , psi)
°C (°F)
°C (°F)
mm (in)
mm (in)
mm (in) 1,400–1,600 (55.12–62.99)
Unit
F30AMHD F40BMHD F40BWHD
69H22
mm (in)
mm (in)
#88
mm (in) 2.4 (0.09)
1 7/8 ±
turns out
1/2
r/min
Maintenance specification
Model
0.05 (0.0020)
0.012–0.044 (0.0005–0.0017)
1.498–1.502 (0.0590–0.0591)
1.494–1.498 (0.0588–0.0590)
1.490–1.494 (0.0587–0.0588)
Trochoid
58–62 (136–144)
70 (158)
3.0 (0.12)
1,750 (68.9)
Model
67C23 —
— 67C03
12.0–16.0 (0.47–0.63)
1.4 (0.06)
#95
2.8 (0.11)
#40 —
— #38
2 ± 1/2
850 ± 50
F40BED
1
2
3
4
5
—
6
—
7
F40BED
67C23
8
—
9
#40
—
2-10