Series 3 PowerBuilt™

The PowerBuilt line is an entry-line of engines that are value-engineered for residential needs. Featuring OHV (OverHead Valve) technology, AVS® Anti-vibration system and the simple-to-maintain design, ensure a smooth running durable and longer lasting engine.

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Product Details

Cartridge Air Cleaner

Provides protection again airborne debris entering the engine

AVS® - Anti-Vibration System

Patented linear balancing system eliminates side-to-side motion of traditional systems. Provide less vibration and smoother operation.

Cast Iron Sleeve

Adds integrity and durability that withstand wear and abuse while providing improved oil control.

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OHV Technology

Optimized performance that delivers longer engine life and improved fuel economy

Magnetron® Electronic Ignition System

Ensures maintenance-free, easy starting

Mechanical Governor

Controls the engine speed to deliver more usable power under heavy usage

High Oil Fill Tube

Allows for easier maintenance

Float Feed Carburetor

Optimized fuel delivery for improved startability and superior performance

Splash Lubrication

Ensures adequate lubrication throughout the crankcase during normal operating conditions.

Engine Technology Single cylinder, 4-stroke, air cooled, OHV (Overhead Valve)
Model Number 21R5
Gross Torque* (Nm) @ 3'600 rpm 20.78
Displacement (cc) 344
Cylinder Cast Iron Sleeve
Bore (mm) 87.3
Stroke (mm) 57.5
Fuel Tank Capacity (l) 2.6 (Optional)
Oil Capacity (l) 1.4
Dry Weight (kg) 26.8
Dimensions Length (mm) 452
Dimensions Width (mm) 393
Dimensions Height (mm) 327

* Power levels are stated gross torque per SAE J1940 as rated by Briggs & Stratton.
** Power levels are stated gross power (horsepower) per SAE J1940 as rated by Briggs & Stratton.

Engine Technology Single cylinder, 4-stroke, air cooled, OHV (Overhead Valve)
Model Number 21R6
Gross Torque* (Nm) @ 3'600 rpm 22.77
Displacement (cc) 344
Cylinder Cast Iron Sleeve
Bore (mm) 87.3
Stroke (mm) 57.5
Fuel Tank Capacity (l) 2.6 (Optional)
Oil Capacity (l) 1.4
Dry Weight (kg) 26.8
Dimensions Length (mm) 452
Dimensions Width (mm) 393
Dimensions Height (mm) 327

* Power levels are stated gross torque per SAE J1940 as rated by Briggs & Stratton.
** Power levels are stated gross power (horsepower) per SAE J1940 as rated by Briggs & Stratton.

Engine Technology Single cylinder, 4-stroke, air cooled, OHV (Overhead Valve)
Model Number 21R7
Gross Torque* (Nm) @ 3'600 rpm 24.74
Displacement (cc) 344
Cylinder Cast Iron Sleeve
Bore (mm) 87.3
Stroke (mm) 57.5
Fuel Tank Capacity (l) 2.6 (Optional)
Oil Capacity (l) 1.4
Dry Weight (kg) 26.8
Dimensions Length (mm) 452
Dimensions Width (mm) 393
Dimensions Height (mm) 327

* Power levels are stated gross torque per SAE J1940 as rated by Briggs & Stratton.
** Power levels are stated gross power (horsepower) per SAE J1940 as rated by Briggs & Stratton.

Engine Technology Single cylinder, 4-stroke, air cooled, OHV (Overhead Valve)
Model Number 21R8
Gross Torque* (Nm) @ 3'600 rpm 25.72
Displacement (cc) 344
Cylinder Cast Iron Sleeve
Bore (mm) 87.3
Stroke (mm) 57.5
Fuel Tank Capacity (l) 2.6 (Optional)
Oil Capacity (l) 1.4
Dry Weight (kg) 26.8
Dimensions Length (mm) 452
Dimensions Width (mm) 393
Dimensions Height (mm) 327

* Power levels are stated gross torque per SAE J1940 as rated by Briggs & Stratton.
** Power levels are stated gross power (horsepower) per SAE J1940 as rated by Briggs & Stratton.