John Deere X120 Riding Mower Parts
The John Deere X120 riding mower, produced from 2011 to 2017, offered a blend of reliability and performance for homeowners. Powered by a dependable 20 HP Briggs & Stratton single-cylinder engine, it was primarily available with a 42-inch mower deck. This model gained popularity for its ease of use, comfortable ride, and ability to handle typical residential lawn care tasks efficiently.
The John Deere X120 was introduced in 2011 as part of the X100 series, designed for residential lawn care. It features a Briggs & Stratton 31R577 single-cylinder engine, delivering 20 horsepower. The engine's displacement is 500cc. The X120 comes equipped with a hydrostatic transmission, offering smooth and responsive control. This model was primarily offered with a 42-inch Edge mower deck, known for its durability and cutting performance. Key features include a comfortable high-back seat, easy-to-use controls, and a durable steel frame. The X120 is designed for homeowners with small to medium-sized lawns, providing a reliable and efficient mowing experience. It distinguishes itself from other models in the X100 series with its specific engine and deck combination, offering a balance of power and maneuverability for typical residential use.
Specifications
| Engine | Briggs & Stratton 20 HP 500cc Single-Cylinder |
|---|---|
| Transmission | Hydrostatic |
| Deck Size | 42 inches |
| Ground Speed | 5.5 mph (Forward) / 3.2 mph (Reverse) |
| Fuel Capacity | 2.4 gallons |
| Weight | 440 lbs |
| Years Produced | 2011-2017 |
Maintenance Tips
- Regularly inspect and replace mower deck belts and drive belts every 100-200 hours of use, or as soon as you notice signs of wear.
- Sharpen or replace mower blades at least once a season, or more frequently if you mow in sandy or abrasive conditions.
- Change the engine oil and filter every 50 hours of operation, and clean or replace the air filter every 25 hours to maintain engine performance.
- Before storing the mower for the winter, stabilize the fuel, drain the fuel lines, and disconnect the battery to prevent damage from corrosion or freezing.
History & Background
The John Deere X120 was launched in 2011 as a new model within the X100 series. There were no major redesigns during its production run, which lasted until 2017. It served as a reliable and affordable option for homeowners seeking a capable lawn tractor.
Frequently Asked Questions
What size deck does the John Deere X120 have?
The John Deere X120 is equipped with a 42-inch mower deck, providing a wide cutting swath for efficient mowing.
What engine is in the John Deere X120?
The John Deere X120 is powered by a 20 horsepower Briggs & Stratton single-cylinder engine.
What belt do I need for my John Deere X120?
The John Deere X120 typically uses a deck belt with John Deere part number GX20072 or aftermarket equivalent. The drive belt part number is M154621 or aftermarket equivalent. It's always best to consult your owner's manual for the most accurate part numbers.
What blades fit the John Deere X120?
The John Deere X120 uses two 21-inch blades for its 42-inch deck. The blade typically has a 5-point star center hole.

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