Briggs & Stratton Engine Specs
Have a stamped code?
Every engine in this brand carries a stamped model, type, and code. Paste it into the decoder for the build date and what each part means.
EXi / 550EX-725EX Series
Briggs & Stratton's ReadyStart walk-behind mower engines - 140, 150 and 163cc, one shared platform, decoded by model stamp. How to decode a EXi / 550EX-725EX Series stamp.
- Engine records are being verified and will be added here.
Intek (single-cylinder OHV)
The lawn-tractor standard: Briggs & Stratton's single-cylinder OHV rider engines, decoded. How to decode a Intek (single-cylinder OHV) stamp.
- Intek 33R877 - The current 19 HP Intek single - the standard repower for 42-46 in. riders.
PowerBuilt
Briggs & Stratton's big-box rider line: 344cc and 500cc OHV singles under a generation of lawn tractors. How to decode a PowerBuilt stamp.
- PowerBuilt 215802 - The 15.3 ft-lb PowerBuilt 215802 - the 344cc OHV single fitted to a generation of big-box riders and lawn tractors.
- PowerBuilt 215807 - The 15.3 ft-lb PowerBuilt 215807 - the 344cc OHV single fitted to a generation of big-box riders and lawn tractors.
- PowerBuilt 217802 - The 16.8 ft-lb PowerBuilt 217802 - the 344cc OHV single fitted to a generation of big-box riders and lawn tractors.
- PowerBuilt 217807 - The 16.8 ft-lb PowerBuilt 217807 - the 344cc OHV single fitted to a generation of big-box riders and lawn tractors.
- PowerBuilt 219807 - The 18.2 ft-lb PowerBuilt 219807 - the 344cc OHV single fitted to a generation of big-box riders and lawn tractors.
- PowerBuilt 21B807 - The 19.0 ft-lb PowerBuilt 21B807 - the 344cc OHV single fitted to a generation of big-box riders and lawn tractors.
- PowerBuilt 31A507 - The 21.2 ft-lb PowerBuilt 31A507 - the 500cc OHV single fitted to a generation of big-box riders and lawn tractors.
- PowerBuilt 31A607 - The 22.6 ft-lb PowerBuilt 31A607 - the 500cc OHV single fitted to a generation of big-box riders and lawn tractors.
- PowerBuilt 31A677 - The 22.6 ft-lb PowerBuilt 31A677 - the 500cc OHV single fitted to a generation of big-box riders and lawn tractors.
- PowerBuilt 31A707 - The 24.1 ft-lb PowerBuilt 31A707 - the 500cc OHV single fitted to a generation of big-box riders and lawn tractors.
- PowerBuilt 31C707 - The 25.5 ft-lb PowerBuilt 31C707 - the 500cc OHV single fitted to a generation of big-box riders and lawn tractors.
- PowerBuilt 31N707 - The 27.0 ft-lb PowerBuilt 31N707 - the 500cc OHV single fitted to a generation of big-box riders and lawn tractors.
Professional Series (single-cylinder)
The prosumer rider singles: Briggs & Stratton's pressure-lubricated 500 and 540 cc tractor engines, decoded. How to decode a Professional Series (single-cylinder) stamp.
- Professional Series 31L777 - The original Professional Series rider single - 17.5 gross HP on the 500 cc block with full-pressure lubrication.
- Professional Series 31Q777 - The 18.5 gross HP Professional Series single - the high-output tune of the 500 cc tractor block.
- Professional Series 31S977 - The current Professional Series rider single - 17.5 HP and 500 cc with full-pressure lubrication and a spin-on filter.
- Professional Series 33M777 - The top-rated Professional Series single - 21.0 gross HP on the 540 cc block for large tractors and zero-turns.
- Professional Series 33S877 - The current Professional Series rider single - 19 HP and 540 cc, and the factory upgrade repower for Intek riders.