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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
        true
        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
        true
        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
        true
        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
        true
        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
        true
        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
        true
        true
        true
        true
        true
        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.