Briggs and Stratton general-purpose engines model decode:
Example: 3-0-3-4-4-7
| Symbol | Modifications |
| 30 | Cubic inch displacement: 30 – 30 cu.in |
| 3 | Basic design series: 0-9 A-Z |
| 4 | Crankshaft orientation: 0-4 – Horizontal shaft 5-9 – Vertical shaft A-G – Horizontal shaft H-Z – Vertical shaft |
| 4 | PTO bearing, reduction gear, auxiliary drive, lubrication: 0 – Plain bearing/DU, Non-flange mount 1 – Plain bearing, Flange mounting 2 – Sleeve bearing, Flange mounting, Splash lubrication 3 – Ball bearing, Flange mounting, Splash lubrication 4 – Ball bearing, Flange mounting, Pressure lubrication 5 – Plain bearing, Gear reduction (6 to 1) CCW Rotation, Flange mounting 6 – Ball bearing, Gear reduction (2 to 1) CCW Rotation 7 – Plain bearing, Pressure lubrication 8 – Plain bearing, Auxiliary drive (PTO) perpendicular to crankshaft 9 – Plain bearing, Auxiliary drive parallel to crankshaft A – Plain bearing, Pressure lubrication w/o oil filter |
| 4 | Type of starter: 0 – Without starter 1 – Rope starter 2 – Rewind starter 3 – Electric starter only (110V or 230V), Gear drive 4 – Electric starter (110V or 230V), Gear drive with alternator 5 – Electric starter only (12V or 24V), Gear drive 6 – Alternator only 7 – Electric starter (12V or 24V), Gear drive with alternator 8 – Vertical pull starter or side pull starter 9 – Mechanical starter A – Electric starter (12V or 24V), Gear drive with alternator and inverter |
| Engine | Displacement | Power output (max.) |
| Single-cylinder | ||
| 252707 | 399 cc (24.35 cu.in.) | 11.0 HP at 3,600 rpm |
| 253707 | 399 cc (24.35 cu.in.) | 11.0 HP at 3,600 rpm |
| 281707 | 465 cc (28.4 cu.in.) | 12.0 HP at 3,600 rpm |
| 282707 | 465 cc (28.4 cu.in.) | 12.0 HP at 3,600 rpm |
| 286707 | 465 cc (28.4 cu.in.) | 12.5 HP at 3,600 rpm |
| 289707 | 465 cc (28.4 cu.in.) | 12.5 HP at 3,600 rpm |
| 28M707 | 465 cc (28.4 cu.in.) | 13.0 HP at 3,300 rpm |
| 28N707 | 465 cc (28.4 cu.in.) | 15.5 HP at 3,300 rpm |
| 28Q777 | 465 cc (28.4 cu.in.) | 15.5 HP at 3,300 rpm |
| 28R707 | 465 cc (28.4 cu.in.) | 13.5 HP at 3,300 rpm |
| 28S777 | 465 cc (28.4 cu.in.) | 13.5 HP at 3,300 rpm |
| 310707 | 501 cc (30.6 cu.in.) | 16.5 HP at 3,600 rpm |
| 311707 | 501 cc (30.6 cu.in.) | 16.5 HP at 3,600 rpm |
| 311777 | 501 cc (30.6 cu.in.) | 17.0 HP at 3,600 rpm |
| 31A607 | 501 cc (30.6 cu.in.) | 15.5 HP at 3,600 rpm |
| 31C707 | 501 cc (30.6 cu.in.) | 17.5 HP at 3,600 rpm |
| 31E777 | 501 cc (30.6 cu.in.) | 16.0 HP at 3,600 rpm |
| 31F707 | 501 cc (30.6 cu.in.) | 17.0 HP at 3,600 rpm |
| 31G777 | 501 cc (30.6 cu.in.) | 17.5 HP at 3,300 rpm |
| 31H777 | 501 cc (30.6 cu.in.) | 18.0 HP at 3,600 rpm |
| 31N707 | 501 cc (30.6 cu.in.) | 18.5 HP at 3,600 rpm |
| 31P777 | 501 cc (30.6 cu.in.) | 18.5 HP at 3,600 rpm |
| 31P977 | 501 cc (30.6 cu.in.) | 20.0 HP at 3,600 rpm |
| 31Q777 | 501 cc (30.6 cu.in.) | 18.5 HP at 3,300 rpm |
| 31R777 | 501 cc (30.6 cu.in.) | 15.5 HP at 3,300 rpm |
| 31R977 | 501 cc (30.6 cu.in.) | 17.5 HP at 3,600 rpm |
| 331777 | 540 cc (32.9 cu.in.) | 20.0 HP at 3,600 rpm |
| 331877 | 540 cc (32.9 cu.in.) | 21.0 HP at 3,600 rpm |
| Two-cylinder | ||
| 294447 | 480 cc (29.3 cu.in.) | 14.0 HP at 3,600 rpm |
| 303447 | 495 cc (30.2 cu.in.) | 16.0 HP at 3,600 rpm |
| 303777 | 495 cc (30.2 cu.in.) | 16.0 HP at 3,600 rpm |
| 350447 | 570 cc (34.8 cu.in.) | 18.0 HP at 3,600 rpm |
| 350777 | 570 cc (34.8 cu.in.) | 18.0 HP at 3,600 rpm |
| 351777 | 570 cc (34.8 cu.in.) | 20.0 HP at 3,600 rpm |
| 386447 | 627 cc (38.2 cu.in.) | 23.0 HP at 3,600 rpm |
| 386777 | 627 cc (38.2 cu.in.) | 23.0 HP at 3,600 rpm |
| 400707 | 655 cc (40.0 cu.in.) | 16.0 HP at 3,600 rpm |
| 402437 | 655 cc (40.0 cu.in.) | 16.0 HP at 3,600 rpm |
| 402707 | 655 cc (40.0 cu.in.) | 16.0 HP at 3,600 rpm |
| 40G777 | 656 cc (40.0 cu.in.) | 20.0 HP at 3,600 rpm |
| 40H777 | 656 cc (40.0 cu.in.) | 22.0 HP at 3,600 rpm |
| 422447 | 694 cc (42.3 cu.in.) | 18.0 HP at 3,600 rpm |
| 422707 | 694 cc (42.3 cu.in.) | 18.0 HP at 3,600 rpm |
| 42A707 | 694 cc (42.3 cu.in.) | 18.0 HP at 3,600 rpm |
| 44P777 | 724 cc (44.2 cu.in.) | 26.0 HP at 3,600 rpm |
| 49M877 | 810 cc (48.4 cu.in.) | 30.0 HP at 3,600 rpm |