Specifications

13
188
FUEL SYSTEM IDENTIFICATION
Model Fuel System
Type
Color
Code
290400 Gravity Yellow
290400 Pump White
294400 Gravity Pump
294400 Pump None
303400 Gravity Blue
303400 Pump None
350400 Gravity Blue
350400 Pump None
CARBURETOR MAIN JETS
Model Jet Number
351400
Left cylinder (#1) #94
Right cylinder (#2) #98
351700
Left cylinder (#1) #98
Right cylinder (#2) #100
380400
Left cylinder (#1) #110
Right cylinder (#2) #114
380700
Left cylinder (#1) #118
Right cylinder (#2) #116
405770 #132
445770 #140
540000
610000
Left Cylinder #136
Right Cylinder #138
Secondary Upper
#120 (2 used)
Secondary Lower
#150 (2 used)
REFERENCE PRESSURES FOR GASEOUS
FUELED ENGINES
Tank Pressure 90 psi minimum
Secondary inlet under load 11 inches of water
Secondary outlet under load 0 to slight vacuum
1 psi = 16 ounces = 27.72 inches of water
DIODE FAILURE DIAGNOSIS
Switch ON Switch OFF Cause
Engine Runs on
Only 1 Cylinder
Shuts Off OK 1 Closed
Diode
Engine Runs on
Both Cylinders
Only 1 Cylinder
Shuts Off
1 Open
Diode
Won’t Run
(No Spark)
2 Closed
Diodes
Engine Runs on
Both Cylinders
Engine Won’t Shut
Off
2 Open
Diodes
CRANKSHAFT GRINDING DIMENSIONS
NOTE: Dimensions in Inches (Millimeters), Fig. 3
Model
Crankpin
Diameter
(Dim. A)
Throw
(Dim. T)
Fillet Radius
(Dim. R)
29/30
1.4567 –
1.4568
1.30
(33.02)
350/351
1
.
4568
(37.00
1.375
38
(
37.03)
1
.
375
(34.93)
0.170 – 0.180
54
1.654
(42.01)
1.535
(39.00)
00080
(4.32 – 4.57)
61
1.654
(42.01)
Fig. 3
R
A
T
For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983
www.mymowerparts.com