John Deere S120 Riding Mower Parts

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The John Deere S120 riding mower, part of the 100 Series, offers reliable performance for homeowners. Manufactured starting in 2021, this model typically features a Briggs & Stratton single-cylinder engine around 20 HP and a 42-inch mowing deck. Known for its ease of use and comfortable operation, the S120 is a popular choice for maintaining small to medium-sized lawns.

The John Deere S120 was introduced as part of the 100 Series lineup, offering a blend of affordability and performance for residential users. This model typically features a Briggs & Stratton single-cylinder engine, producing approximately 20 horsepower. The engine displacement is around 500cc. Power is delivered through a hydrostatic transmission, providing smooth and responsive operation. A key feature is the Edge™ cutting system, offering a 42-inch deck width. The S120's deck is designed for superior cut quality and even distribution of clippings. This riding mower is primarily intended for residential use on lawns up to an acre in size. Compared to other models in the 100 Series, the S120 often includes enhanced comfort features and improved cutting performance, making it a step up from the entry-level models.

Specifications

Engine	Briggs & Stratton 20 HP 500cc Single-Cylinder
Transmission	Hydrostatic
Deck Size	42 inches
Ground Speed	5.5 mph
Fuel Capacity	2.4 gallons
Weight	434 lbs
Years Produced	2021-Present

Maintenance Tips

Replace the mower deck belt every 100-200 hours of use, or annually, to ensure optimal cutting performance.
Sharpen or replace mower blades every 25 hours of use, or at least once per season, for a clean and even cut.
Change the engine oil and filter every 50 hours of use, or annually, using the recommended oil type and filter specified in your owner's manual.
Before storing the mower for the winter, stabilize the fuel, disconnect the battery, and clean the mower deck to prevent corrosion.

History & Background

The John Deere S120 was introduced in 2021 as a continuation of the successful 100 Series. Designed as an entry-level riding mower focused on ease of use and reliability, the S120 offers a user-friendly experience at an affordable price point within the John Deere lineup.

Frequently Asked Questions

What size deck does the John Deere S120 have?

The John Deere S120 comes equipped with a 42-inch Edge™ cutting system mower deck.

What engine is in the John Deere S120?

The John Deere S120 typically features a Briggs & Stratton single-cylinder engine producing approximately 20 horsepower.

What belt do I need for my John Deere S120?

The John Deere S120 uses a 42-inch deck belt. Consult your owner's manual for the exact John Deere part number, or search for aftermarket equivalents using your model number. You may also need a drive belt, which also varies by model year.

What blades fit the John Deere S120?

The John Deere S120 uses two 21-inch blades for its 42-inch deck. Ensure you select blades designed for John Deere mowers for proper fit and performance.

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