Vanguard
TM
Twin-Cylinder OHV Liquid-Cooled Engine
Section 1 - General Information
Page 3
SECTION 1 GENERAL INFORMATION
BRIGGS & STRATTON NUMERICAL IDENTIFICATION SYSTEM
This chart explains the unique Briggs & Stratton numerical model designation system. It is possible to determine most of the important
mechanical features of the engine by merely knowing the model number. Here is how it works:
• A. The first one or two digits indicate the approximate CUBIC INCH DISPLACEMENT.
• B. The first digit after the displacement indicates the BASIC DESIGN SERIES, relating to cylinder construction, ignition, general
configuration, etc.
• C. The second digit after the displacement indicates ORIENTATION OF CRANKSHAFT.
• D. The third digit after the displacement indicates TYPE OF BEARINGS, and whether or not the engine is equipped with
REDUCTION GEAR or AUXILIARY DRIVE.
• E. The last digit indicates the TYPE OF STARTER.
BRIGGS & STRATTON MODEL NUMBERING SYSTEM
First Digit
After Displalcement
Second Digit
After Displalcement
Third Digit
After Displalcement
Fourth Digit
After Displalcement
A
B
C
D
E
Cubic Inch
Displacement
Basic
Design Series
PTO Bearing
Reduction Gear,
Auxiliary Drive,
Lubrication
Crankshaft
Orientation
Type of
Starter
Plain Bearing/DU
Non-Flange Mount
Plain Bearing
Flange Mount
Sleeve Bearing
Flange Mounting
Splash Lube
Ball Bearing
Flange Mounting
Splash Lube
Ball Bearing
Flange Mounting
Pressure Lubrication
Plain Bearing
Gear Reduction
(6-1) CCW Rotation
Flange Mounting
Plain Bearing
Gear Reduction
(2-1) CCW Rotation
Plain Bearing
Pressure Lubrication
Plain Bearing
Auxiliary Drive (PTO)
Perpendicular to
Crankshaft
Plain Bearing
Auxiliary Drive (PTO)
Parallel to
Crankshaft
Plain Bearing
Pressure Lubrication
Without Oil Filter
0 -
1 -
2 -
3 -
4 -
5 -
6 -
7 -
8 -
9 -
A -
Example - To Identify Model 303447:
30
30 Cubic Inch
3
Design Series 3
4
Horizantal Shaft
0
1
2
3
4
5
6
7
8
9
A to Z
6
8
9
10
11
12
13
16
18
19
20
21
22
23
24
25
28
29
30
31
32
35
38
40
42
43
44
46
47
52
54
58
0 to 4 - Horizantal Shaft
5 to 9 - Verticle Shaft
A to G - Horizantal Shaft
H to z - Verticle Shaft
Without Starter
Rope Starter
Rewind Starter
Electric Starter Only
110 or 230 Volt Gear
Drive
Electric Starter/110
or 230 Volt Gear
Drive with Alternator
Electric Starter Only
12 or 24 Volt Gear
Drive
Alternator Only
Electric Starter 12 or
24 Volt Gear Drive
with Alternator
Verticle Pull Starter
or Side Pull Starter
Mechanical Starter
Electric Starter 12 or
24 Volt Gear Drive
with Alternator and
Inverter
0 -
1 -
2 -
3 -
4 -
5 -
6 -
7 -
8 -
9 -
A -
4
Horizantal Shaft
Flange Mounting
Pressure Lubrication
7
Electric Starter
12 or 24 Volt Gear Drive
with Alternator
TYPE 1234-01 The type number identifies the engine mechanical parts, color of paint, decals, goverened speed and original Equipment Manufacturer.
Code 01061201 The code is the manufacturing dat and is read as follows:
Year
01
MONTH
06
DAY
12
ASSEMBLY LINE AND MANUFACTURING PLANT
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