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    EXi Series™ Engines

    EXi Series Engines
    EXi Series Engines
    EXi Series Engines

    EXi Series™ Engines

    Higher power, performance and durability.

    Our EXi Series V-Twin riding mower engines are all about performance. The V-Twin design delivers more power, is naturally balanced for less vibration, and runs cooler and cleaner thanks to its full pressure lubrication system and advanced air filtering. It all adds up to less wear on components for longer life and reduced maintenance. Want more? Choose our ReadyStart® for Ride option to start your mower as easily as a car – just turn the key or push the button and go.

    • Advanced Debris Management System – Helps our engines run cleaner and longer by deflecting and ejecting grass and debris, providing a longer life.
    • Full Pressure Lubrication System – Continuously feeds oil through the premium oil filter and crank pin bearing for enhanced durability and longer engine life.
    • Optional no choke starting.

    656 - 724cc

    Displacement

    Gas

    Engine Fuel
    Feature

    Features

    Made in the USA

    Made in the USA of US and global parts.

    ReadyStart® for Ride Technology

    Automotive-style, no choke easy starting. Just turn the key or push the button and go.

    Advanced Debris Management System

    Keeps the engine clean by deflecting and ejecting grass and debris for a longer engine life.

    Full Pressure Lube System

    Reduces component wear for longer engine life.

    V-Twin Engine

    For more power, comfort and durability.

    Specs

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    Model Number
    40R6
    Engine Displacement (cc)
    656
    Number of Cylinders
    V-Twin
    Engine Configuration
    Vertical Shaft
    OHV Engine
    Yes
    Length (in)
    19.1
    Width (in)
    18.2
    Height (in)
    14.3
    Weight (lbs)
    84
    Bore (in)
    2.97
    Stroke (in)
    2.89
    Engine Fuel
    Gasoline
    Fuel Tank Capacity (gal)
    N/A
    Oil Capacity (oz)
    64
    Lubrication System
    Full Pressure Lubrication
    Oil Filter
    Standard
    Starter
    Electric Start
    Air Filter
    Cartridge Air Cleaner with Advanced Debris Management
    Muffler
    N/A
    Fuel Shutoff Valve
    Optional
    Certified Power Rating
    Download Power Curve
    Marketing Oil Capacity
    64
    Marketing Number of Cylinders
    2
    Marketing Gross Horsepower
    16.0 - 24.0
    Gross Horsepower
    16

    *All power levels are stated gross torque at 2600 rpm per SAE J1940 as rated by Briggs & Stratton.
    **All power levels are stated gross horsepower at 3600 rpm per SAE J1940 as rated by Briggs & Stratton.

    Model Number
    40R7
    Engine Displacement (cc)
    656
    Number of Cylinders
    V-Twin
    Engine Configuration
    Vertical Shaft
    OHV Engine
    Yes
    Length (in)
    19.1
    Width (in)
    18.2
    Height (in)
    14.3
    Weight (lbs)
    84
    Bore (in)
    2.97
    Stroke (in)
    2.89
    Engine Fuel
    Gasoline
    Fuel Tank Capacity (gal)
    N/A
    Oil Capacity (oz)
    64
    Lubrication System
    Full Pressure Lubrication
    Oil Filter
    Standard
    Starter
    Electric Start
    Air Filter
    Cartridge Air Cleaner with Advanced Debris Management
    Muffler
    N/A
    Fuel Shutoff Valve
    Optional
    Certified Power Rating
    Download Power Curve
    Marketing Oil Capacity
    64
    Marketing Number of Cylinders
    2
    Marketing Gross Horsepower
    16.0 - 24.0
    Gross Horsepower
    18

    *All power levels are stated gross torque at 2600 rpm per SAE J1940 as rated by Briggs & Stratton.
    **All power levels are stated gross horsepower at 3600 rpm per SAE J1940 as rated by Briggs & Stratton.

    Model Number
    40R8
    Engine Displacement (cc)
    656
    Number of Cylinders
    V-Twin
    Engine Configuration
    Vertical Shaft
    OHV Engine
    Yes
    Length (in)
    19.1
    Width (in)
    18.2
    Height (in)
    14.3
    Weight (lbs)
    84
    Bore (in)
    2.97
    Stroke (in)
    2.89
    Engine Fuel
    Gasoline
    Fuel Tank Capacity (gal)
    N/A
    Oil Capacity (oz)
    64
    Lubrication System
    Full Pressure Lubrication
    Oil Filter
    Standard
    Starter
    Electric Start
    Air Filter
    Cartridge Air Cleaner with Advanced Debris Management
    Muffler
    N/A
    Fuel Shutoff Valve
    Optional
    Certified Power Rating
    Download Power Curve
    Marketing Oil Capacity
    64
    Marketing Number of Cylinders
    2
    Marketing Gross Horsepower
    16.0 - 24.0
    Gross Horsepower
    20

    *All power levels are stated gross torque at 2600 rpm per SAE J1940 as rated by Briggs & Stratton.
    **All power levels are stated gross horsepower at 3600 rpm per SAE J1940 as rated by Briggs & Stratton.

    Model Number
    44R6
    Engine Displacement (cc)
    724
    Number of Cylinders
    V-Twin
    Engine Configuration
    Vertical Shaft
    OHV Engine
    Yes
    Length (in)
    19.1
    Width (in)
    18.2
    Height (in)
    14.3
    Weight (lbs)
    84
    Bore (in)
    3.12
    Stroke (in)
    2.89
    Engine Fuel
    Gasoline
    Fuel Tank Capacity (gal)
    N/A
    Oil Capacity (oz)
    64
    Lubrication System
    Full Pressure Lubrication
    Oil Filter
    Standard
    Starter
    Electric Start
    Air Filter
    Cartridge Air Cleaner with Advanced Debris Management
    Muffler
    N/A
    Fuel Shutoff Valve
    Optional
    Certified Power Rating
    Download Power Curve
    Marketing Oil Capacity
    64
    Marketing Number of Cylinders
    2
    Marketing Gross Horsepower
    16.0 - 24.0
    Gross Horsepower
    22

    *All power levels are stated gross torque at 2600 rpm per SAE J1940 as rated by Briggs & Stratton.

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

    Model Number
    44R8
    Engine Displacement (cc)
    724
    Number of Cylinders
    V-Twin
    Engine Configuration
    Vertical Shaft
    OHV Engine
    Yes
    Length (in)
    19.1
    Width (in)
    18.2
    Height (in)
    14.3
    Weight (lbs)
    84
    Bore (in)
    3.12
    Stroke (in)
    2.89
    Engine Fuel
    Gasoline
    Fuel Tank Capacity (gal)
    N/A
    Oil Capacity (oz)
    64
    Lubrication System
    Full Pressure Lubrication
    Oil Filter
    Standard
    Starter
    Electric Start
    Air Filter
    Cartridge Air Cleaner with Advanced Debris Management
    Muffler
    N/A
    Fuel Shutoff Valve
    Optional
    Certified Power Rating
    Download Power Curve
    Marketing Oil Capacity
    64
    Marketing Number of Cylinders
    2
    Marketing Gross Horsepower
    16.0 - 24.0
    Gross Horsepower
    24

    *All power levels are stated gross torque at 2600 rpm per SAE J1940 as rated by Briggs & Stratton.

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

    Model Number
    40R6
    40R7
    40R8
    44R6
    44R8
    Engine Displacement (cc)
    656
    656
    656
    724
    724
    Number of Cylinders
    V-Twin
    V-Twin
    V-Twin
    V-Twin
    V-Twin
    Engine Configuration
    Vertical Shaft
    Vertical Shaft
    Vertical Shaft
    Vertical Shaft
    Vertical Shaft
    OHV Engine
    Yes
    Yes
    Yes
    Yes
    Yes
    Length (in)
    19.1
    19.1
    19.1
    19.1
    19.1
    Width (in)
    18.2
    18.2
    18.2
    18.2
    18.2
    Height (in)
    14.3
    14.3
    14.3
    14.3
    14.3
    Weight (lbs)
    84
    84
    84
    84
    84
    Bore (in)
    2.97
    2.97
    2.97
    3.12
    3.12
    Stroke (in)
    2.89
    2.89
    2.89
    2.89
    2.89
    Engine Fuel
    Gasoline
    Gasoline
    Gasoline
    Gasoline
    Gasoline
    Fuel Tank Capacity (gal)
    N/A
    N/A
    N/A
    N/A
    N/A
    Oil Capacity (oz)
    64
    64
    64
    64
    64
    Lubrication System
    Full Pressure Lubrication
    Full Pressure Lubrication
    Full Pressure Lubrication
    Full Pressure Lubrication
    Full Pressure Lubrication
    Oil Filter
    Standard
    Standard
    Standard
    Standard
    Standard
    Starter
    Electric Start
    Electric Start
    Electric Start
    Electric Start
    Electric Start
    Air Filter
    Cartridge Air Cleaner with Advanced Debris Management
    Cartridge Air Cleaner with Advanced Debris Management
    Cartridge Air Cleaner with Advanced Debris Management
    Cartridge Air Cleaner with Advanced Debris Management
    Cartridge Air Cleaner with Advanced Debris Management
    Muffler
    N/A
    N/A
    N/A
    N/A
    N/A
    Fuel Shutoff Valve
    Optional
    Optional
    Optional
    Optional
    Optional
    Certified Power Rating
    Download Power Curve
    Download Power Curve
    Download Power Curve
    Download Power Curve
    Download Power Curve
    Marketing Oil Capacity
    64
    64
    64
    64
    64
    Marketing Number of Cylinders
    2
    2
    2
    2
    2
    Marketing Gross Horsepower
    16.0 - 24.0
    16.0 - 24.0
    16.0 - 24.0
    16.0 - 24.0
    16.0 - 24.0
    Gross Horsepower
    16
    18
    20
    22
    24

    *All power levels are stated gross torque at 2600 rpm per SAE J1940 as rated by Briggs & Stratton.
    **All power levels are stated gross horsepower at 3600 rpm per SAE J1940 as rated by Briggs & Stratton.

    Push Mower Engines

    Conquer Your Yard

    At the end of the day, a job well done is its own reward. Our equipment is there to help make it happen. It's easy to master, durable and ready for a challenge. Just like you.

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