Tables; Fuel System Identification; Carburetor Main Jets; Reference Pressures - Gaseous Fuel Engines - Vanguard OHV V-Twin User Manual

FUEL SYSTEM IDENTIFICATION

Model Fuel System
Type
290400 Gravity
290400 Pump
294400 Gravity
294400 Pump
303400 Gravity
303400 Pump
350400 Gravity
350400 Pump

CARBURETOR MAIN JETS

Model Jet Number
Left cylinder (#1) #94
351400
Right cylinder (#2) #98
Left cylinder (#1) #98
351700
Right cylinder (#2) #100
Left cylinder (#1) #110
380400
Right cylinder (#2) #114
Left cylinder (#1) #118
380700
Right cylinder (#2) #116
405770 #132
445770 #140
Left Cylinder #136
Right Cylinder #138
Secondary Upper
540000
610000 #120 (2 used)
Secondary Lower
#150 (2 used)
REFERENCE PRESSURES FOR GASEOUS
FUELED ENGINES
Tank Pressure
Secondary inlet under load
Secondary outlet under load
1 psi = 16 ounces = 27.72 inches of water
188
Color
Code
Yellow
White
Pump
None
Blue
None
Blue
None
90 psi minimum
11 inches of water
0 to slight vacuum

DIODE FAILURE DIAGNOSIS

Switch ON Switch OFF
Engine Runs on Shuts Off OK
Only 1 Cylinder
Engine Runs on Only 1 Cylinder
Both Cylinders Shuts Off
Won't Run
(No Spark)
Engine Runs on Engine Won't Shut
Both Cylinders Off

CRANKSHAFT GRINDING DIMENSIONS

NOTE: Dimensions in Inches (Millimeters), Fig. 3
Crankpin
Throw
Model Diameter
(Dim. T)
(Dim. A)
1.30
1.4567 –
29/30
(33.02)
1.4568 1.4568
350/351
( (37.00
1.375 1.375
37.03)
38 (34.93)
1.654 1.535
54
(42.01) (39.00)
1.654
61
(42.01)
R
A
T
Fig. 3
Cause
1 Closed
Diode
1 Open
Diode
2 Closed
Diodes
2 Open
Diodes
Fillet Radius
(Dim. R)
0 0.170 – 0.180 0 0 80
(4.32 – 4.57)