Briggs & Stratton 121S12-2008-F1 190cc 7/8" x 3-5/32" Vertical Shaft Recoil Start Engine

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Briggs & Stratton Professional Series Single Cylinder Air-Cooled 4-Cycle Gas Engine


  • Produces 8.75 lbs/ft torque* - Power levels are stated gross torque per SAE J1995
  • Overhead Valve (OHV) Technology
  • More power, less fuel-use & lower emmisions
  • Runs cooler for longer engine and valve life
  • Keeps the engine running cooler for maximum productivity
  • ReadyStart Starting System
  • No prime, no choke, no worries
  • Dual-Sealing Air Cleaner
  • Improved debris resistance
  • Longer life of your engine
  • Acoustically-Engineered Muffler
  • Quiet operation and excellent tonal quality
  • Larger Rewind Starter
  • Reduces pulling effort for easy starting
  • Float-Feed Carburetor & Mechanical Governor
  • Allows for fast fuel delivery for reliable starting and operation
  • Increases throttle response to maximize usable power for higher torque applications
  • 0.8 Gallon Gas Tank Included

Engine Series: B&S Professional Series
Engine Style: Vertical
Engine Type: 4-Cycle OHV
Cooling System: Air
Dry Weight: 30 Lbs
Displacement: 190 CCs
Max Torque: 8.75 Lbs
Cylinder Bore Type: Aluminum
Bore: 2.69 Inches
Stroke: 2.04 Inches
Starting System: Recoil Only
Ignition System: Electronic Spark
Lubrication: Splash
Oil Filter: No
Oil Capacity: 20 oz
Fuel: Gas
Carburetor: Float
Muffler: Included
Air Cleaner: Dual Element
Fuel Tank Size: 0.8 Gallons
Fuel Tank: Included
Crankshaft Rotation Direction: Counterclockwise
Shaft Size: 7/8 x 3-5/32 Inches
Crankshaft Type: Straight
Crankshaft Diameter: 7/8"
Crankshaft Length: 3-5/32"
Crankshaft End Tapped Size: 3/8"-24
Crankshaft Keyway Width: 2 #505 Woodruff Keys & 3/16" Straight Inches

Briggs and Stratton

WARNING: This product may contain chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. For more information, go to

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