BriggsAndStratton.com

Briggs & Stratton Engine Identification

Example:

Model
405777

Type
0125-01

Code
99052115

This chart explains the 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:

FIRST DIGIT
AFTER DISPLACEMENT

SECOND DIGIT
AFTER DISPLACEMENT

THIRD DIGIT
AFTER DISPLACEMENT

FOURTH DIGIT
AFTER DISPLACEMENT

CUBIC INCH
DISPLACEMENT

BASIC
DESIGN SERIES

CRANKSHAFT,
CARBURETOR,
GOVERNOR

PTO BEARING,
REDUCTION GEAR,
AUXILIARY DRIVE,
LUBRICATION

TYPE OF STARTER

6
8
9
10
11
12
13
16
17
18
19
22
23
24
25
26
28
29
30
31
32
35
38
40
42
44
46

0
1
2
3
4
5
6
7
8
9
A to Z

0 -	Horizontal Shaft Diaphragm Carburetor Pneumatic Governor
1 -	Horizontal Shaft Vacu-Jet Carburetor Pneumatic Governor
2 -	Horizontal Shaft Pulsa-Jet Carburetor Pneumatic or Mechanical Governor
3 -	Horizontal Shaft Flo-Jet Carburetor Pneumatic Governor
4 -	Horizontal Shaft Flo-Jet Carburetor Mechanical Governor
5 -	Vertical Shaft Vacu-Jet Carburetor Pneumatic or Mechanical Governor
6 -	Vertical Shaft
7 -	Vertical Shaft Flo-Jet Carburetor Pneumatic or Mechanical Governor
8 -	Vertical Shaft Flo-Jet Carburetor Mechanical Governor
9 -	Vertical Shaft Pulsa-Jet Carburetor Pneumatic or Mechanical Governor

0 -	Plain Bearing/DU Non-Flange Mount
1 -	Plain Bearing Flange Mounting
2 -	Sleeve Bearing Flange Mounting Splash Lube
3 -	Ball Bearing Flange Mounting Splash Lube
4 -	Ball Bearing Flange Mounting Pressure Lubrication on Horizontal Shaft
5 -	Plain Bearing Gear Reduction (6 to 1) CW Rotation Flange Mounting
6 -	Plain Bearing Gear Reduction (6 to 1) CCW Rotation
7 -	Plain Bearing Pressure Lubrication on Vertical Shaft
8 -	Plain Bearing Auxiliary Drive (PTO) Perpendicular to Crankshaft
9 -	Plain Bearing Auxiliary Drive Parallel to Crankshaft

0 -	Without Starter
1 -	Rope Starter
2 -	Rewind Starter
3 -	Electric Starter Only 120 Volt Gear Drive
4 -	Electric Starter/Generator 12 Volt Belt Drive
5 -	Electric Starter Only 12 Volt Gear Drive
6 -	Alternator Only
7 -	Electric Starter 12 Volt Gear Drive With Alternator
8 -	Vertical Pull Starter or Side Pull Starter

The type number identifies certain unique features such as the crankshaft or governor spring used on an engine.

The code number identifies the assembly date of the engine. In some instances it is necessary to know the code number as well as the model and type number when performing adjustments, repairs or ordering replacement parts for an engine. Here is how it works:

Example: 99052115

The first two digits, 99, indicate the calendar year, 1999.
The second two digits, 05, indicate the calendar month, May.
The third two digits, 21, indicate the calendar month day.
The last two digits, 15, indicate the assembly line or manufacturing plant.