1. Home
    2. Products
    3. Engines
    4. Riding Lawn Mower Engines

    Commercial Series Engines

    Commercial Series Engines
    Commercial Series Engines
    Commercial Series Engines
    Commercial Series Engines

    Commercial Series Engines

    Commercial Performance, Reliable Power.

    These V-Twin engines are specially designed for zero turn mowers and other high-debris applications to endure extended use in extreme conditions. Cyclonic air filtering keeps dirt out and extends engine life. The V-Twin design delivers more power, is naturally balanced for less vibration, runs cooler and cleaner, and includes Electronic Fuel Management for easy starting – just like a car.

    • 5-Step Cyclonic Debris Management extends engine life.
    • Premium oil and fuel filters protect the engine.
    • Reliable, automotive-style starting.
    • Made in the USA of US and global parts.

    16.0 - 27.0

    Gross Horsepower (ft-lbs)

    656 - 810cc

    Displacement

    Gasoline

    Engine Fuel

    64 - 67

    Oil Capacity (oz)
    Feature

    Features

    Made in the USA

    Made in the USA of US and global parts.

    Electronic Fuel Management

    Starts as consistently as your car.

    Patented 5-Step Integrated Cyclonic Debris Management System

    Extended durability under heavy debris conditions.

    V-Twin Engine

    For more power, comfort and durability.

    Specs

    Only 2 products can be compared at once. Please remove one of your selections to compare this product.

    Only 3 products can be compared at once. Please remove one of your selections to compare this product.

    At least one product must be displayed. Please select another option to remove this product

    Model Number
    44T6
    Torque (ft-lbs, gross)*
    16
    Engine Displacement (cc)
    656
    Number of Cylinders
    V-Twin
    Engine Configuration
    Vertical Shaft
    OHV Engine
    Yes
    Length (in)
    19.3
    Width (in)
    17.6
    Height (in)
    15.7
    Weight (lbs)
    84
    Bore (in)
    2.97
    Stroke (in)
    2.89
    Engine Fuel
    Gasoline
    Fuel Tank Capacity (gal)
    N/A
    Lubrication System
    Full Pressure Lubrication
    Oil Capacity (oz)
    64
    Oil Filter
    Premium
    Starter
    Optional EFM
    Air Filter
    Integrated Cyclonic Air Cleaner - Patented 5 Step
    Muffler
    Optional
    Certified Power Rating
    Download Power Curve
    Warranty Consumer Product Info
    3 year consumer warranty
    Warranty Commercial Product Info
    3 year commercial warranty

    *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
    44T6
    Torque (ft-lbs, gross)*
    18
    Engine Displacement (cc)
    656
    Number of Cylinders
    V-Twin
    Engine Configuration
    Vertical Shaft
    OHV Engine
    Yes
    Length (in)
    19.3
    Width (in)
    17.6
    Height (in)
    15.7
    Weight (lbs)
    84
    Bore (in)
    2.97
    Stroke (in)
    2.89
    Engine Fuel
    Gasoline
    Fuel Tank Capacity (gal)
    N/A
    Lubrication System
    Full Pressure Lubrication
    Oil Capacity (oz)
    64
    Oil Filter
    Premium
    Starter
    Optional EFM
    Air Filter
    Integrated Cyclonic Air Cleaner - Patented 5 Step
    Muffler
    Optional
    Certified Power Rating
    Download Power Curve
    Warranty Consumer Product Info
    3 year consumer warranty
    Warranty Commercial Product Info
    3 year commercial warranty

    *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
    40T8
    Torque (ft-lbs, gross)*
    20
    Engine Displacement (cc)
    656
    Number of Cylinders
    V-Twin
    Engine Configuration
    Vertical Shaft
    OHV Engine
    Yes
    Length (in)
    19.3
    Width (in)
    17.6
    Height (in)
    15.7
    Weight (lbs)
    84
    Bore (in)
    2.97
    Stroke (in)
    2.89
    Engine Fuel
    Gasoline
    Fuel Tank Capacity (gal)
    N/A
    Lubrication System
    Full Pressure Lubrication
    Oil Capacity (oz)
    64
    Oil Filter
    Premium
    Starter
    Optional EFM
    Air Filter
    Integrated Cyclonic Air Cleaner - Patented 5 Step
    Muffler
    Optional
    Certified Power Rating
    Download Power Curve
    Warranty Consumer Product Info
    3 year consumer warranty
    Warranty Commercial Product Info
    3 year commercial warranty

    *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
    44T6
    Torque (ft-lbs, gross)*
    22
    Engine Displacement (cc)
    724
    Number of Cylinders
    V-Twin
    Engine Configuration
    Vertical Shaft
    OHV Engine
    Yes
    Length (in)
    19.3
    Width (in)
    17.6
    Height (in)
    15.7
    Weight (lbs)
    84
    Bore (in)
    3.12
    Stroke (in)
    2.89
    Engine Fuel
    Gasoline
    Fuel Tank Capacity (gal)
    N/A
    Lubrication System
    Full Pressure Lubrication
    Oil Capacity (oz)
    67
    Oil Filter
    Premium
    Starter
    Optional EFM
    Air Filter
    Integrated Cyclonic Air Cleaner - Patented 5 Step
    Muffler
    N/A
    Certified Power Rating
    Download Power Curve
    Warranty Consumer Product Info
    3 year consumer warranty
    Warranty Commercial Product Info
    3 year commercial warranty

    *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
    44T7
    Torque (ft-lbs, gross)*
    23
    Engine Displacement (cc)
    724
    Number of Cylinders
    V-Twin
    Engine Configuration
    Vertical Shaft
    OHV Engine
    Yes
    Length (in)
    19.3
    Width (in)
    17.6
    Height (in)
    15.7
    Weight (lbs)
    84
    Bore (in)
    3.12
    Stroke (in)
    2.89
    Engine Fuel
    Gasoline
    Fuel Tank Capacity (gal)
    N/A
    Lubrication System
    Full Pressure Lubrication
    Oil Capacity (oz)
    67
    Oil Filter
    Premium
    Starter
    Optional EFM
    Air Filter
    Integrated Cyclonic Air Cleaner - Patented 5 Step
    Muffler
    N/A
    Certified Power Rating
    Download Power Curve
    Warranty Consumer Product Info
    3 year consumer warranty
    Warranty Commercial Product Info
    3 year commercial warranty

    *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
    44T8
    Torque (ft-lbs, gross)*
    24
    Engine Displacement (cc)
    724
    Number of Cylinders
    V-Twin
    Engine Configuration
    Vertical Shaft
    OHV Engine
    Yes
    Length (in)
    19.3
    Width (in)
    17.6
    Height (in)
    15.7
    Weight (lbs)
    84
    Bore (in)
    3.12
    Stroke (in)
    2.89
    Engine Fuel
    Gasoline
    Fuel Tank Capacity (gal)
    N/A
    Lubrication System
    Full Pressure Lubrication
    Oil Capacity (oz)
    67
    Oil Filter
    Premium
    Starter
    Optional EFM
    Air Filter
    Integrated Cyclonic Air Cleaner - Patented 5 Step
    Muffler
    N/A
    Certified Power Rating
    Download Power Curve
    Warranty Consumer Product Info
    3 year consumer warranty
    Warranty Commercial Product Info
    3 year commercial warranty

    *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
    44T9
    Torque (ft-lbs, gross)*
    25
    Engine Displacement (cc)
    724
    Number of Cylinders
    V-Twin
    Engine Configuration
    Vertical Shaft
    OHV Engine
    Yes
    Length (in)
    19.3
    Width (in)
    17.6
    Height (in)
    15.7
    Weight (lbs)
    84
    Bore (in)
    3.12
    Stroke (in)
    2.89
    Engine Fuel
    Gasoline
    Fuel Tank Capacity (gal)
    N/A
    Lubrication System
    Full Pressure Lubrication
    Oil Capacity (oz)
    67
    Oil Filter
    Premium
    Starter
    Optional EFM
    Air Filter
    Integrated Cyclonic Air Cleaner - Patented 5 Step
    Muffler
    N/A
    Certified Power Rating
    Download Power Curve
    Warranty Consumer Product Info
    3 year consumer warranty
    Warranty Commercial Product Info
    3 year commercial warranty

    *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
    44X9
    Torque (ft-lbs, gross)*
    25
    Engine Displacement (cc)
    724
    Engine Configuration
    Vertical
    Length (in)
    19.3
    Width (in)
    17.6
    Height (in)
    15.7
    Weight (lbs)
    86.5
    Stroke (in)
    2.89
    Lubrication System
    Full Pressure Lubrication with Oil Filter
    Oil Capacity (oz)
    67
    Air Filter
    Integral Cyclonic Air Filter
    Compression Ratio
    8:5:1
    Ignition System
    Computer Controlled Electronic Ignition
    Bore
    3.12
    Warranty Commercial Product Info
    3 Year Commercial Limited

    *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
    49T7
    Torque (ft-lbs, gross)*
    26
    Engine Displacement (cc)
    810
    Number of Cylinders
    V-Twin
    Engine Configuration
    Vertical Shaft
    OHV Engine
    Yes
    Length (in)
    19.3
    Width (in)
    17.6
    Height (in)
    15.7
    Weight (lbs)
    87
    Bore (in)
    3.30
    Stroke (in)
    2.89
    Engine Fuel
    Gasoline
    Lubrication System
    Full Pressure Lubrication
    Oil Capacity (oz)
    67
    Oil Filter
    Premium
    Starter
    Optional EFM
    Air Filter
    Integrated Cyclonic Air Cleaner - Patented 5 Step
    Muffler
    N/A
    Certified Power Rating
    Download Power Curve
    Warranty Consumer Product Info
    3 year consumer warranty
    Warranty Commercial Product Info
    3 year commercial warranty

    *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
    49T8
    Torque (ft-lbs, gross)*
    27
    Engine Displacement (cc)
    810
    Number of Cylinders
    V-Twin
    Engine Configuration
    Vertical Shaft
    OHV Engine
    Yes
    Length (in)
    19.3
    Width (in)
    17.6
    Height (in)
    15.7
    Weight (lbs)
    87
    Bore (in)
    3.30
    Stroke (in)
    2.89
    Engine Fuel
    Gasoline
    Fuel Tank Capacity (gal)
    N/A
    Lubrication System
    Full Pressure Lubrication
    Oil Capacity (oz)
    67
    Oil Filter
    Premium
    Starter
    Optional EFM
    Air Filter
    Integrated Cyclonic Air Cleaner - Patented 5 Step
    Muffler
    N/A
    Certified Power Rating
    Download Power Curve
    Warranty Consumer Product Info
    3 year consumer warranty
    Warranty Commercial Product Info
    3 year commercial warranty

    *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
    49X9
    Torque (ft-lbs, gross)*
    27
    Engine Displacement (cc)
    810
    Engine Configuration
    Vertical
    Length (in)
    19.3
    Width (in)
    17.6
    Height (in)
    15.7
    Weight (lbs)
    89
    Stroke (in)
    2.89
    Lubrication System
    Full Pressure Lubrication with Oil Filter
    Oil Capacity (oz)
    67
    Air Filter
    Integral Cyclonic Air Filter
    Compression Ratio
    8:5:1
    Ignition System
    Computer Controlled Electronic Ignition
    Bore
    3.3
    Warranty Commercial Product Info
    3 Year Commercial Limited

    *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
    44T6
    44T6
    40T8
    44T6
    44T7
    44T8
    44T9
    44X9
    49T7
    49T8
    49X9
    Torque (ft-lbs, gross)*
    16
    18
    20
    22
    23
    24
    25
    25
    26
    27
    27
    Engine Displacement (cc)
    656
    656
    656
    724
    724
    724
    724
    724
    810
    810
    810
    Number of Cylinders
    V-Twin
    V-Twin
    V-Twin
    V-Twin
    V-Twin
    V-Twin
    V-Twin
    V-Twin
    V-Twin
    Engine Configuration
    Vertical Shaft
    Vertical Shaft
    Vertical Shaft
    Vertical Shaft
    Vertical Shaft
    Vertical Shaft
    Vertical Shaft
    Vertical
    Vertical Shaft
    Vertical Shaft
    Vertical
    OHV Engine
    Yes
    Yes
    Yes
    Yes
    Yes
    Yes
    Yes
    Yes
    Yes
    Length (in)
    19.3
    19.3
    19.3
    19.3
    19.3
    19.3
    19.3
    19.3
    19.3
    19.3
    19.3
    Width (in)
    17.6
    17.6
    17.6
    17.6
    17.6
    17.6
    17.6
    17.6
    17.6
    17.6
    17.6
    Height (in)
    15.7
    15.7
    15.7
    15.7
    15.7
    15.7
    15.7
    15.7
    15.7
    15.7
    15.7
    Weight (lbs)
    84
    84
    84
    84
    84
    84
    84
    86.5
    87
    87
    89
    Bore (in)
    2.97
    2.97
    2.97
    3.12
    3.12
    3.12
    3.12
    3.30
    3.30
    Stroke (in)
    2.89
    2.89
    2.89
    2.89
    2.89
    2.89
    2.89
    2.89
    2.89
    2.89
    2.89
    Engine Fuel
    Gasoline
    Gasoline
    Gasoline
    Gasoline
    Gasoline
    Gasoline
    Gasoline
    Gasoline
    Gasoline
    Fuel Tank Capacity (gal)
    N/A
    N/A
    N/A
    N/A
    N/A
    N/A
    N/A
    N/A
    Lubrication System
    Full Pressure Lubrication
    Full Pressure Lubrication
    Full Pressure Lubrication
    Full Pressure Lubrication
    Full Pressure Lubrication
    Full Pressure Lubrication
    Full Pressure Lubrication
    Full Pressure Lubrication with Oil Filter
    Full Pressure Lubrication
    Full Pressure Lubrication
    Full Pressure Lubrication with Oil Filter
    Oil Capacity (oz)
    64
    64
    64
    67
    67
    67
    67
    67
    67
    67
    67
    Oil Filter
    Premium
    Premium
    Premium
    Premium
    Premium
    Premium
    Premium
    Premium
    Premium
    Starter
    Optional EFM
    Optional EFM
    Optional EFM
    Optional EFM
    Optional EFM
    Optional EFM
    Optional EFM
    Optional EFM
    Optional EFM
    Air Filter
    Integrated Cyclonic Air Cleaner - Patented 5 Step
    Integrated Cyclonic Air Cleaner - Patented 5 Step
    Integrated Cyclonic Air Cleaner - Patented 5 Step
    Integrated Cyclonic Air Cleaner - Patented 5 Step
    Integrated Cyclonic Air Cleaner - Patented 5 Step
    Integrated Cyclonic Air Cleaner - Patented 5 Step
    Integrated Cyclonic Air Cleaner - Patented 5 Step
    Integral Cyclonic Air Filter
    Integrated Cyclonic Air Cleaner - Patented 5 Step
    Integrated Cyclonic Air Cleaner - Patented 5 Step
    Integral Cyclonic Air Filter
    Muffler
    Optional
    Optional
    Optional
    N/A
    N/A
    N/A
    N/A
    N/A
    N/A
    Certified Power Rating
    Download Power Curve
    Download Power Curve
    Download Power Curve
    Download Power Curve
    Download Power Curve
    Download Power Curve
    Download Power Curve
    Download Power Curve
    Download Power Curve
    Warranty Consumer Product Info
    3 year consumer warranty
    3 year consumer warranty
    3 year consumer warranty
    3 year consumer warranty
    3 year consumer warranty
    3 year consumer warranty
    3 year consumer warranty
    3 year consumer warranty
    3 year consumer warranty
    Warranty Commercial Product Info
    3 year commercial warranty
    3 year commercial warranty
    3 year commercial warranty
    3 year commercial warranty
    3 year commercial warranty
    3 year commercial warranty
    3 year commercial warranty
    3 Year Commercial Limited
    3 year commercial warranty
    3 year commercial warranty
    3 Year Commercial Limited
    Compression Ratio
    8:5:1
    8:5:1
    Ignition System
    Computer Controlled Electronic Ignition
    Computer Controlled Electronic Ignition
    Bore
    3.12
    3.3

    *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.

    Riding Mower Engines

    Tackle 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.

    Email Newsletter Sign Up

    Copyright © 2021 Briggs & Stratton. All rights reserved.