Briggs & Stratton EX Series Engines

MSRP

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With more power and features, our EX Series riding mower engines give you the performance you need. The lubrication system extends engine life, and includes a standard oil filter and oil pump to push clean oil to critical components.

Advanced Debris Management System – Helps our engines run cleaner and longer by deflecting and ejecting grass and debris, providing a longer life.
AVS^® Anti-Vibration System – Gives you a smoother ride, saving wear and tear on your engine, your equipment and you.

Model Number

21R7

Gross Horsepower (ft-lbs)*

10.5

Engine Displacement (cc)

344

Number of Cylinders

Single

Engine Configuration

Vertical Shaft

OHV Engine

true

Length (in)

17.8

Width (in)

15.5

Height (in)

12.9

Weight (lbs)

Bore (in)

3.44

Stroke (in)

2.26

Engine Fuel

Gasoline

Fuel Tank Capacity (gal)

0.7 (optional)

Lubrication System

Partial Lubrication System

Oil Capacity (oz)

Oil Filter

Standard

Starter

Electric Start, Recoil Optional

Air Filter

Cartridge Air Cleaner with Advanced Debris Management

Muffler

Optional

Certified Power Rating

Download Power Curve

Fuel Shutoff Valve

Optional

^{* All power levels are stated gross horsepower at 3600 rpm per SAE J1940 as rated by Briggs & Stratton.}

Model Number

21R8

Gross Horsepower (ft-lbs)*

11.5

Engine Displacement (cc)

344

Number of Cylinders

Single

Engine Configuration

Vertical Shaft

OHV Engine

true

Length (in)

17.8

Width (in)

15.5

Height (in)

12.9

Weight (lbs)

Bore (in)

3.44

Stroke (in)

2.26

Engine Fuel

Gasoline

Fuel Tank Capacity (gal)

0.7 (optional)

Lubrication System

Partial Lubrication System

Oil Capacity (oz)

Oil Filter

Standard

Starter

Electric Start, Recoil Optional

Air Filter

Cartridge Air Cleaner with Advanced Debris Management

Muffler

Optional

Certified Power Rating

Download Power Curve

Fuel Shutoff Valve

Optional

^{* All power levels are stated gross horsepower at 3600 rpm per SAE J1940 as rated by Briggs & Stratton.}

Model Number

31R5

Gross Horsepower (ft-lbs)*

13.5

Engine Displacement (cc)

500

Number of Cylinders

Single

Engine Configuration

Vertical Shaft

OHV Engine

true

Length (in)

18.9

Width (in)

15.5

Height (in)

12.9

Weight (lbs)

Bore (in)

3.56

Stroke (in)

3.06

Engine Fuel

Gasoline

Fuel Tank Capacity (gal)

N/A

Lubrication System

Partial Lubrication System

Oil Capacity (oz)

Oil Filter

Standard

Starter

Electric Start

Air Filter

Cartridge Air Cleaner with Advanced Debris Management

Muffler

Optional

Certified Power Rating

Download Power Curve

Fuel Shutoff Valve

Optional

^{* All power levels are stated gross horsepower at 3600 rpm per SAE J1940 as rated by Briggs & Stratton.}

Model Number

31R7

Gross Horsepower (ft-lbs)*

15.5

Engine Displacement (cc)

500

Number of Cylinders

Single

Engine Configuration

Vertical Shaft

OHV Engine

true

Length (in)

18.9

Width (in)

15.5

Height (in)

12.9

Weight (lbs)

Bore (in)

3.56

Stroke (in)

3.06

Engine Fuel

Gasoline

Fuel Tank Capacity (gal)

N/A

Lubrication System

Partial Lubrication System

Oil Capacity (oz)

Oil Filter

Standard

Starter

Electric Start

Air Filter

Cartridge with Advanced Debris Management

Muffler

Optional

Certified Power Rating

Download Power Curve

Fuel Shutoff Valve

Optional

^{* All power levels are stated gross horsepower at 3600 rpm per SAE J1940 as rated by Briggs & Stratton.}

Model Number

31R9

Gross Horsepower (ft-lbs)*

17.5

Engine Displacement (cc)

500

Number of Cylinders

Single

Engine Configuration

Vertical Shaft

OHV Engine

true

Length (in)

18.9

Width (in)

15.5

Height (in)

12.9

Weight (lbs)

Bore (in)

3.56

Stroke (in)

3.06

Engine Fuel

Gasoline

Fuel Tank Capacity (gal)

N/A

Lubrication System

Partial Lubrication System

Oil Capacity (oz)

Oil Filter

Standard

Starter

Electric Start

Air Filter

Cartridge with Advanced Debris Management

Muffler

Optional

Certified Power Rating

Download Power Curve

Fuel Shutoff Valve

Optional

^{* All power levels are stated gross horsepower at 3600 rpm per SAE J1940 as rated by Briggs & Stratton.}

Model Number

33S8

Gross Horsepower (ft-lbs)*

Engine Displacement (cc)

540

Number of Cylinders

Single

Engine Configuration

Vertical Shaft

OHV Engine

true

Length (in)

18.9

Width (in)

16.2

Height (in)

12.9

Weight (lbs)

Bore (in)

3.70

Stroke (in)

3.06

Engine Fuel

Gasoline

Fuel Tank Capacity (gal)

N/A

Lubrication System

Full Pressure Lubrication

Oil Capacity (oz)

Oil Filter

Standard

Starter

Electric Start

Air Filter

Dual Element Cartridge with Advanced Debris Management

Muffler

Optional

Certified Power Rating

Download Power Curve

Fuel Shutoff Valve

Optional

^{* All power levels are stated gross horsepower at 3600 rpm per SAE J1940 as rated by Briggs & Stratton.}

Briggs & Stratton EX Series Engines

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Briggs & Stratton EX Series Engines

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