Identifying Your engine
Briggs and Stratton engines are generally called by their crankshaft alignment, cylinder count and valve configuration.
They also have a unique Model, type and code numbering system which identifies each engine.
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Crankshaft alignment is either VERTICAL or HORIZONTAL.
Vertical crankshaft engines have the crankshaft running vertically through the engine and extending out of the bottom. The piston and cylinder
are horizontal with the flywheel on top of the engine. These are the engines fitted to rotary lawnmowers.
Horizontal crankshaft engines have the crankshaft running horizontally through the engine and extending through the side.The piston and
cylinder run vertically up and down with the flywheel on the side of the engine.
This is the number and configuration of the cylinders and pistons in the engine. This will be either SINGLE CYLINDER, TWIN CYLINDER('V' or opposed), THREE CYLINDER etc.
The type of valve set up is also noted. Either OVERHEAD VALVE or SIDE VALVE(also called L-HEAD).
Model, Type and Code numbers
Briggs and Stratton engines are identified with a MODEL, TYPE and CODE number system and take the form of the example below.
- The MODEL number is either 5 or 6 digits which may contain letters
- The TYPE number is 4 digits followed by an extension of 2 digits. Letters may be used in the extension
- The CODE number is the machine's serial number. The first 2 digits are the year of manufacture
(the example above was made in 1999)
The numbers can be in a variety of locations depending upon the engine but are generally to be found either:-
Sometimes, plastic covers or excess paint may obscure the details but they will be there.
- Stamped into the front, top or side of the main cowling
- Stamped into the plate over the exhaust
- Etched into the plastic cover
- Stamped into the rocker cover on an OHV engine
- On a transfer, sticker or riveted plate on the main cowling
The only exception is if the main cowling or part holding the details has been previously replaced. In which case the details should have been retained from the old part.
Get Briggs and Statton's help to find model numbers