How Do I Find My Direct Engine Replacement Specifications?

There are many variables that come into play when replacing an existing engine with a new one (shaft extension, mounting base, overall fit, etc.). To ensure you’re replacing your engine correctly, make sure to read our guide below with relevant catalogs to find the right engine replacement specifications.

PLEASE NOTE: The engines listed in our catalogs are meant to fit a wide variety of equipment and may NOT necessarily be the exact engine you have currently on your equipment or the replacement engine that you are planning on purchasing. However, comparing an engine our catalogs to one with a similar horsepower and engine name will provide a general idea of the engine specifications.

To determine your direct engine replacement specifications, find resources below or jump down to the most relevant section:

What is the direct replacement for my engine?
What are the specifications for my vertical shaft replacement engine? 
What are the specifications for my horizontal shaft replacement engine?
What are the specifications for my liquid cooled replacement engine?
Where can I find engine replacement assistance?

Information regarding your direct engine replacement is available in our Replacement Engine Catalog (MS-5568). Our engine replacement catalog shows all of the service replacement engines and provides the measurements of the engines, specification information, mounting pattern and other valuable dimensions, numbers, etc. This catalog contains only our most commonly used "multi-purpose" engines.

Note: Engine mounting hardware is NOT included with new replacement engines. If replacing an engine on an existing application, reusing the current mounting hardware is recommended. If the engine is to be installed on a new application, self-tapping mounting bolts are generally needed as engine mounting holes are blank.

For additional information regarding mounting bolts and torque values, please review our Engine Mounting Hardware PDF.

Service replacement engine specifications for our vertical shaft models are available through the links below. These PDF files for vertical shaft replacement engines provide the measurements of the engine, specification information, and other valuable dimensions, numbers, etc. that will assist you in seeking a replacement engine.

If you have more questions or need help determining your replacement engines, check out our engine replacement assistance section below.

Find your engine specifications for your vertical shaft models here:

• Model Series 9P700 - 5.50 Gross Torque/140cc
• Model Series 10T800 - 5.50 Gross Torque/158cc
• Model Series 126M00 - 6.75 Gross Torque/190cc
• Model Series 100600 - 7.00 Gross Torque/161cc
• Model Series 100800 - 7.00 Gross Torque/161cc
• Model Series 121Q00 Professional Series™ - 8.50 Gross Torque/190cc
• Model Series 121S00 Professional Series™ - 8.75 Gross Torque/190cc
• Model Series 215800 Power Built™ - 10.5 Gross HP/344cc
• Model Series 31A600 Power Built™ - 15.5 Gross HP/500cc
• Model Series 31C700 Power Built™ - 17.5 Gross HP/500cc
• Model Series 31N700 Power Built™ - 18.5 Gross HP/500cc
• Model Series 217900 INTEK™ - 11.5 Gross HP/344cc
• Model Series 219900 INTEK™ - 12.5 Gross Torque/344cc
• Model Series 31G700 INTEK™ - 17.5 Gross HP/500cc
• Model Series 331800 INTEK™ - 21.0 Gross HP/540cc
• Model Series 445500 INTEK™ - 23.0 Gross HP/724cc
• Model Series 31L700 Professional Series™ - 17.5 Gross HP/500cc
• Model Series 31Q700 Professional Series™ - 18.5 Gross HP/500cc
• Model Series 33M700 Professional Series™ - 21.0 Gross HP/540cc
• Model Series 44L700 Professional Series™ - 23.0 Gross HP/724cc
• Model Series 44Q700 Professional Series™ - 27.0 Gross Torque/724cc
• Model Series 44Q900 Commercial Turf Series™ - 27.0 Gross Torque/724cc
• Model Series 49M800 Professional Series™ - 30.0 Gross HP/810cc
• Model Series 49M900 Commercial Turf Series™ - 30.0 Gross HP/810cc
• Model Series 305700 Vanguard™ - 16.0 Gross HP/479cc
• Model Series 356700 Vanguard™ - 18.0 Gross HP/570cc
• Model Series 358700 Vanguard™ - 20.0 Gross HP/570cc
• Model Series 386700 Vanguard™ - 23.0 Gross HP/627cc

Note: Remember that engine mounting hardware is NOT included with new replacement engines. For information regarding mounting bolts and torque values, please review our Engine Mounting Hardware PDF.

Find your replacement engine specifications for your horizontal shaft models here:

• Model Series 83100 - 5.50 Gross Torque/127cc
• Model Series 12T100 - 8.00 Gross Torque/205cc
• Model Series 12S400 - 9.00 Gross Torque/205cc
• Model Series 15T200 - 11.50 Gross Torque/250cc
• Model Series 20T200 - 14.50 Gross Torque/305cc
• Model Series 20S200 - 14.50 Gross Torque/305cc
• Model Series 21S200 - 16.50 GrossTorque/342cc
• Model Series 25T200 - 21.00 Gross Torque/420cc
• Model Series 12D100 Snow - 9.00 Gross Torque/205cc
• Model Series 15C100 Snow Professional - 11.50 Gross Torque/250cc
• Model Series 20M300 Snow Professional - 14.50 Gross Torque/305cc
• Model Series 21M300 Snow Professional - 16.50 Gross Torque/342cc
• Model Series 25M100 Snow Professional - 21.00 Gross Torque/342cc
• Model Series 50000 Vanguard™ - 2.4 Gross HP/81cc
• Model Series 86400 Vanguard™ - 4.0 Gross HP/127cc
• Model Series 118400 Vanguard™ - 6.0 Gross HP/182cc
• Model Series 13L300 Vanguard™ - 6.5 Gross HP/205cc
• Model Series 138400 Vanguard™ - 7.5 Gross HP/216cc
• Model Series 185400 Vanguard™ - 9.0 Gross HP/297cc
• Model Series 19L200 Vanguard™ - 10.0 Gross HP/305cc
• Model Series 235400 Vanguard™ - 11.0 Gross HP/392cc
• Model Series 245400 Vanguard™ - 13.0 Gross HP/392cc
• Model Series 305400 Vanguard™ - 16.0 Gross HP/479cc
• Model Series 356400 Vanguard™ - 18.0 Gross HP/570cc
• Model Series 385400 Vanguard™ - 21.0 Gross HP/627cc
• Model Series 386400 Vanguard™ - 23.0 Gross HP/627cc
• Model Series 543400 Vanguard™ - 31.0 Gross HP/896cc
• Model Series 613400 Vanguard™ - 35.0 Gross HP/993cc

Note: Remember that engine mounting hardware is NOT included with new replacement engines. For information regarding mounting bolts and torque values, please review our Engine Mounting Hardware PDF.

Specifications for our liquid cooled engine models are available by clicking the links below.

• Diesel 3/LC Vanguard™
• Gas 3/LC Vanguard™
• Gas 2/LC Vanguard™
• Turbo Diesel 3/LC Vanguard™
• Vanguard™ Power Units

Note: Remember that engine mounting hardware is NOT included with new replacement engines. For information regarding mounting bolts and torque values, please review our Engine Mounting Hardware PDF.

Engines are available for online purchase through Parts Nationwide, but if you are unsure which replacement engine can be used for your equipment, or would like to know if you can upgrade your existing engine, please feel free to ask questions by contacting Briggs & Stratton customer service.

Information Needed for Engine Replacement Assistance:

In order to properly assist you with locating a replacement engine and short block, make sure to include as much engine specifications as you can below:

If you need to modify the engine’s existing electrical system to match a replacement engine, please view our Electrical schematic/wiring diagrams FAQ.

Contact Your Local Briggs & Stratton Dealer

Since we do not sell factory direct, and cannot know for certain if any of the above engines will fit or need modifications without examining the equipment, we suggest locating and consulting a Briggs & Stratton Authorized Dealer near you via our website or by calling (800) 444-7774.