Model Number Information

YOUR KEY TO THE WORLD’S FINEST ENGINES
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 DISPLACEMENT
SECOND DIGIT
AFTER DISPLACEMENT
THIRD DIGIT
AFTER DISPLACEMENT
FOURTH DIGIT
AFTER DISPLACEMENT
A B C D E
CUBIC INCH
DISPLACEMENT
BASIC
DESIGN SERIES
CRANKSHAFT
ORIENTATION
PTO BEARING,
REDUCTION GEAR,
AUXILIARY DRIVE,
LUBRICATION TYPE OF STARTER
2-61
A - Z
0 to 4 − Horizontal Shaft
5 to 9 − Vertical Shaft
A to G − Horizontal Shaft
H to Z − Vertical Shaft
3 − Ball Bearing
4 − Ball Bearing
Pressure Lubrication
5 − Plain Bearing
Gear Reduction
(6 to 1) CCW Rotation
6 − Ball Bearing
Gear Reduction
(2 to 1) CCW Rotation
7 − Plain Bearing
Pressure Lubrication
9 − Plain Bearing
Auxiliary Drive
0 − Without Starter
2 − Rewind Starter
5 − Electric Starter
6 − Alternator Only
7 − Electric Starter
with Alternator
EXAMPLE − To identify Model 303447:
30 3 4 4 7
30 Cubic Inch Design Series 3 Horizontal Shaft Ball Bearing
Pressure Lubrication
Electric Starter
with Alternator
TYPE 123401, The type number identifies the engines mechanical parts, color of paint, decals, governed speed, and
Original Equipment Manufacturer.
CODE
01061201, The code is the manufacturing date and is read as follows:
YEAR MONTH DAY ASSEMBLY LINE AND MANUFACTURING PLANT
01 06 12 01
Revised
Column E historical numbers that have been discontinued include: 1- Rope Starter, 3- Electrical Starter Only 110 or 230 Volt Gear Drive, 4- Electrical Starter/110 or 230 Volt Gear Drive with Alternator,
0 - 9
7- Electrical Starter Only 12 or 24 Volt Gear Drive, 8- Vertical Pull Starter or Side Pull Starter, 9- Mechanical Starter and A- Electrical Starter 12 or 24 Volt Gear Drive with Alternator & Inverter
Column D historical numbers that have been discontinued include: 1- Plain Bearing/DU, 2- Sleeve Bearing Flange Mounting Splash Lube, 8- Plain Bearing Auxiliary Drive (PTO) Perpendicular to Crankshaft
2/11
0 − Plain Bearing