Small Engines (Lawn Mowers, etc.)/Model, Type, Code


Will you explain what the numbers or letters mean on Briggs and Stratton engines?  Model-Type-Code.  I know the first 2 numbers of the code is the year of manufacture.  I would like to know what the other numbers mean.  Especially how to identify the horsepower of the engine by these numbers.  I will sincerely appreciate this information.


Here is the Briggs link on the number information:

As far as HP is concerned the numbers will only get you a rough HP number.  As an example, some of the 14, 16 and 18 HP opposed twin cylinder engines used the same cubic inch engine block but had different horsepower ratings depending on the eninge RPM speed.  

You should be able to get a close guess as the HP just based on the engine model number.

Small Engines (Lawn Mowers, etc.)

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Eric A. Jones


Lawnmower Repair . Certified Master Service Technician from B&S. Have 23 years experience on B&S, Lawn Chief, Weed Eater, Echo, Peerless, Wheel Horse, Snapper, Atlas, MTD, McCulloch, Homelite and many other numerous brands. Specialize in electrical repair.


Born and raised in the midwest. Started tinkering with engines when I was about 14 on my Suzuki RM-80. I began lawn mower repair at a small hardware store. I knew absolutely nothing. I read lots of repair manuals and met an older fellow who taught me many lessons. I continued working on small engines through high school and paid my way through college working on mowers at the same hardware store. Decided to get away from the midwest and mower repair so I joined the Air Force. I repaired air traffic control electronic equipment and ended up in Hawaii where I got a part time job at Small Engine Clinic. I gained a lot of experience from the Small Engine Clinic and had a blast repairing small engines. I then took the Briggs and Stratton Master Service Technician test and earned my MST. I then traveled to Wisconsin where I attended the factory update training seminar and received formal training. Continued working on mowers part time as I completed 20 years of military. Retired from the military on a Friday and continued in the lawn and garden industry the next Monday.

MAS Aerospace Operations BA Mathematics AAS Electronic Communications AAS Electronic Technology

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