1. Home
    2. Products
    3. Engines
    4. Vertical Shaft Engines

    PXi Series Engines

    PXi Series Engines
    PXi Series Engines
    PXi Series Engines
    PXi Series Engines

    PXi Series Engines

    Professional-grade performance.

    Our PXi Series V-Twin riding mower engines give you premium power and features to handle the big jobs. The enhanced components are extremely durable, and premium air, oil and fuel filters keep the engine running clean to extend engine life. Our optional starting technologies provide reliable, automotive-style starting in all weather conditions – from minus 20°F up to 120°F.

    • 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 crankshaft bearing for enhanced durability and longer engine life.
    • Optional no choke starting with ReadyStart® for Ride.

    20.0 - 25.0

    Gross Horsepower (HP)

    656 - 724cc

    Displacement (cc)

    64 - 67

    Oil Capacity (L)

    Gas

    Engine Fuel
    Feature

    Features

    Made in the USA

    Made in the USA of US and global parts.

    Advanced Debris Management System

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

    Qualified 67% Longer Engine Life*

    When compared to expected life standards of a Briggs & Stratton Intek™.

    Full Pressure Lube System

    Reduces component wear for longer engine life.

    V-Twin Engine

    For more power, comfort and durability.

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

    Specifications

    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
    40S8
    Gross Horsepower (ft-lbs)*
    20
    Displacement (cc)
    656
    Cylinders
    V-Twin
    Engine Configuration
    Vertical Shaft
    OHV Engine
    true
    Length (in)
    19.1
    Width (in)
    18.2
    Height (in)
    14.3
    Weight (kg)
    84
    Stroke (mm)
    2.89
    Oil Capacity (L)
    64
    Lubrication System
    Full Pressure Lubrication
    Oil Filter
    Premium
    Starter
    Electric Start
    Air Filter
    Dual Element Cartridge with Advanced Debris Management
    Muffler
    N/A
    Certified Power Rating
    Download Power Curve
    Fuel Shutoff Valve
    Optional
    Fuel Tank Capacity
    N/A
    Engine Fuel Type
    Gasoline
    Cylinder Bore Size
    2.97

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

    Model Number
    44S6
    Gross Horsepower (ft-lbs)*
    22
    Displacement (cc)
    724
    Cylinders
    V-Twin
    Engine Configuration
    Vertical Shaft
    OHV Engine
    true
    Length (in)
    19.1
    Width (in)
    18.2
    Height (in)
    14.3
    Weight (kg)
    84
    Stroke (mm)
    2.89
    Oil Capacity (L)
    64
    Lubrication System
    Full Pressure Lubrication
    Oil Filter
    Premium
    Starter
    Electric Start
    Air Filter
    Dual Element Cartridge with Advanced Debris Management
    Muffler
    N/A
    Certified Power Rating
    Download Power Curve
    Fuel Shutoff Valve
    Optional
    Fuel Tank Capacity
    N/A
    Engine Fuel Type
    Gasoline
    Cylinder Bore Size
    3.12

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

    Model Number
    44S8
    Gross Horsepower (ft-lbs)*
    24
    Displacement (cc)
    724
    Cylinders
    V-Twin
    Engine Configuration
    Vertical Shaft
    OHV Engine
    true
    Length (in)
    19.1
    Width (in)
    18.2
    Height (in)
    14.3
    Weight (kg)
    84
    Stroke (mm)
    2.89
    Oil Capacity (L)
    64
    Lubrication System
    Full Pressure Lubrication
    Oil Filter
    Premium
    Starter
    Electric Start
    Air Filter
    Dual Element Cartridge with Advanced Debris Management
    Muffler
    N/A
    Certified Power Rating
    Download Power Curve
    Fuel Shutoff Valve
    Optional
    Fuel Tank Capacity
    N/A
    Engine Fuel Type
    Gasoline
    Cylinder Bore Size
    3.12

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

    Model Number
    44S9
    Gross Horsepower (ft-lbs)*
    25
    Displacement (cc)
    724
    Cylinders
    V-Twin
    Engine Configuration
    Vertical Shaft
    OHV Engine
    true
    Length (in)
    19.1
    Width (in)
    18.2
    Height (in)
    14.3
    Weight (kg)
    84
    Stroke (mm)
    2.89
    Oil Capacity (L)
    64
    Lubrication System
    Full Pressure Lubrication
    Oil Filter
    Premium
    Starter
    Electric Start
    Air Filter
    Dual Element Cartridge with Advanced Debris Management
    Muffler
    N/A
    Certified Power Rating
    Download Power Curve
    Fuel Shutoff Valve
    Optional
    Fuel Tank Capacity
    N/A
    Engine Fuel Type
    Gasoline
    Cylinder Bore Size
    3.12

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

    Copyright © 2023 Briggs & Stratton. All rights reserved.