Engine/O.P.E. Model, Type (Spec.) and Code (Serial or D.O.M) numbers.


Model, Type (Spec.) and Code (Serial or D.O.M) numbers are found on every single engine or O.P.E in the U.S.A. You cannot get parts for any engine or power equipment if you do not specify at least the model number. Below, I will explain what most of theses numbers mean and where they can be found.

This first section explains the Tecumseh Model, Spec, and Serial (D.O.M) numbers.

OHHOverhead Valve Horizontal
OHMOverhead Valve Horizontal Medium Frame
OHSKOverhead Valve Horizontal Snow King
OVMOverhead Valve Vertical Medium Frame
OVRMOverhead Valve Vertical Rotary Mower
OVXLOverhead Valve Vertical Medium Frame Xtra-Life
OHVOverhead Valve Vertical

VVERTICAL CRANKSHAFT
LAVLIGHTWEIGHT ALUMINUM VERTICAL
VMVERTICAL MEDIUM FRAME
TVMTECUMSEH VERTICAL MEDIUM FRAME
VHVERTICAL HEAVY DUTY
TVSTECUMSEH VERTICAL STYLED
TNTTORO 'N TECUMSEH
ECVEXCULSIVE CRAFTSMAN VERTICAL
TVXLTECUMSEH VERTICAL EXTRA LIFE

HHORIZONTAL CRANKSHAFT
HSHORIZONTAL SMALL FRAME
HSSKHORIZONTAL SMALL FRAME SNOW KING
HMHORIZONTAL MEDIUM FRAME
HMSKHORIZONTAL MEDIUM FRAME SNOW KING
HHMHORIZONTAL HEAVY DUTY MEDIUM FRAME
HHHORIZONTAL HEAVY DUTY
ECH EXCLUSIVE CRAFTSMAN HORIZONTAL
HSKHORIZONTAL SNOW KING

The following two tables contain the last few numbers used in the model number. The first table contains numbers that describe the engine's horsepower. The second table contains numbers that describe the displacement of the piston. Horsepower interpretations are provided but are not part of the model number.
252.5 HP
303 HP
404 HP
505 HP
606 HP
707 HP
808 HP
10010 HP
75= 7.5 ci3.0 HP
90= 9.0 ci3.5 HP
100-105= 10-10.5 ci4.0 HP
115-125= 11.5-12.5 ci5.0 HP
140= 14 ci6.0 HP
170= 17.0 ci7.0 HP
195= 19.5 ci8.0 HP
220= 22.0 ci10.0 HP

EXAMPLE OF MODEL NUMBER:

TVS90----> Tecumseh Vertical Styled. 9.0 ci displacement.
H60-------> Horizontal Crankshaft. 6.0 horsepower

EXAMPLE OF SPECIFICATION NUMBER. (SECOND SET OF NUMBERS)

43388F---> Used to allocate proper parts for this engine.

EXAMPLE OF SERIAL NUMBER. (THIRD SET OF NUMBERS)

9105B----> 9= the year of manufacture--1989
105= the calendar day the engine was manufactured--April 15
B= the line and shift the engine came from.

The numbers will look like this on the engine's blower housing=

TVS90 43388F SER 9105B

or like this

H60 67523H SER 2243R



Briggs and Stratton

Now Briggs and Stratton, on the other hand, uses an entirely different system. Their model numbers describes the entire engine. Everything from the type of carburetor and governor to the starter and charging system.
6 1,2,3,4 0-Horizontal Shaft, Diaphragm Carburtor, Pneumatic Governor. 0-Plain Bearing/DU, Non-Flange Mount. 0-No Starter with engine.
8,9,10,11,12,13 5,6,7,8 1-Horizontal Shaft, Vacu-Jet Carburetor, Pneumatic Governor. 1-Plain Bearing, Flange Mounting. 1-Rope Starter.
16,17,18,19 9,A,B,C 2-Horizontal Shaft, Pulsa-Jet Carburetor, Pneumatic or Mechanic Governor. 2-Sleeve Bearing, Flange Mounting, Splash Lube. 2-Rewind Starter.
22,23,24,25,26 D,E,F,G 3-Horizontal Shaft, Flo-Jet Carburetor, Pneumatic Governor. 3-Ball Bearing, Flange Mounting, Splash Lube. 3-Electric Starter--120 Volts, Gear driven.
28,29,30 H,I,J,K 4-Horizontal Shaft, Flo-Jet Carburetor, Mechanical Governor. 4-Ball Bearing, Flange Mounting, Presure Lube on Horizontal Shaft Engines. 4-Electric Starter/Generator--12 Volt, Belt Driven.
32 L,M,N,O 5-Vertical Shaft, Vacu-Jet Carburetor, Pneumatic or Mechanical Governor. 5-Plain Bearing, Gear Reduction (6 to 1) CW Rotation, Flange mounting. 5-Electric Starter--12 Volts, Gear Driven
35 P,Q,R,S 6-Vertical Shaft. 6-Plain Bearing, Gear Reduction (6 to 1) CCW Rotation 6-Alternator Only
40 T,U,V,W 7-Vertical Shaft, Flo-Jet Carburetor, Pneumatic or Mechanical Governor. 7-Plain Bearing, Pressure Lube on Vertical Shaft Engines. 7-Electric Starter--12 Volts, Gear Driven, Alternator.
42 X,Y,Z 8-Vertical Shaft, Flo-Jet Carburetor, Mechanical Governor. 8-Plain Bearing, Auxiliary Drive--Perpendicular to Crankshaft. 8-Vertical or Side Pull Starter.
9-Vertical Shaft, Pulsa-Jet Carburetor, Pneumatic or Mechanical Governor. 9-Plain Bearing, Auxiliary Drive--Parallel to Crankshaft.

The numbers in the first column represent the engine size, in cubic inches. The second column represents the design series. This number is the first digit after the engine size (displacement). The third column represents the position of the crankshaft, the type of governor and type of carburetor. (Second number after displacement). The fourth column represents the PTO bearing, auxiliary drive and reduction gear. (Third number after displacement.) And the fifth column indentifies the type of starter and charging system. (Fourth number after displacment.)

EXAMPLE OF MODEL NUMBER:


12H802----> 12 CUBIC INCHES DISPLACMENT, DESIGN SERIES H, 8= VERTICAL SHAFT, FLO-JET CARBURETOR, MECHANICAL GOVERNOR, 0= PLAIN BEARING/DU-NON FLANGE MOUNT, 2= REWIND STARTER.

EXAMPLE OF TYPE NUMBER:


2314-19----> INDENTIFIES THE DECALS, GOVERNED SPEED, OEM ENGINE IS USED ON AND COLOR OF PAINT.

EXAMPLE OF CODE NUMBER:


99032101----> 99 IS THE LAST TWO DIGITS IN THE MANUFACTURING YEAR (1999). 03 IS THE MONTH, (MARCH). 21 IS THE DAY IN THAT MONTH. 01 IS THE MANUFACTURING PLANT.

The numbers will look like this on the engine shroud:

12H802 2314-19 99032101


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