John Deere LA100 Riding Mower Parts

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The John Deere LA100 was part of the LA series, manufactured from 2007 to 2014, and designed for residential use. Powered by a Briggs & Stratton engine, it offered reliable performance for homeowners. Available with a 42-inch mower deck, the LA100 gained popularity as a dependable and affordable option for maintaining smaller to medium-sized lawns.

The John Deere LA100 lawn tractor was introduced in 2007 as part of the LA series, intended to replace older models and provide an updated residential mowing solution. It featured a Briggs & Stratton single-cylinder engine, typically around 17 horsepower and displacing approximately 500cc, providing adequate power for its intended use. The LA100 uses an automatic transmission, making it easy to operate for a wide range of users. It came standard with a 42-inch mower deck, designed for efficient grass cutting on lawns up to an acre in size. Key features of the LA100 included a comfortable seat, easy-to-use controls, and a durable steel frame. It distinguishes itself from entry-level models with improved features and build quality, while remaining more affordable than the premium Select Series like the X300. Primarily used for residential lawn mowing, the LA100 offers a balance of performance and value.

Specifications

Engine	Briggs & Stratton 17 HP 500cc Single Cylinder
Transmission	Automatic
Deck Size	42 inches
Ground Speed	5.5 mph
Fuel Capacity	2.4 gallons
Weight	465 lbs
Years Produced	2007-2014

Maintenance Tips

Replace the mower deck belt every 200-300 hours of use to ensure optimal cutting performance and prevent belt failure.
Sharpen mower blades at least twice per season, or more frequently if you encounter rocky or sandy soil conditions. Dull blades tear the grass, increasing the risk of disease.
Change the engine oil and filter every 50 hours of operation, or at least once a year, to maintain engine health and longevity.
Before storing the LA100 for the winter, stabilize the fuel with a fuel stabilizer additive to prevent fuel breakdown and carburetor issues. Disconnect the battery and store it in a cool, dry place.

History & Background

The John Deere LA100 was introduced in 2007 as a mid-range lawn tractor in the LA Series. It offered a balance of features and affordability for residential users. The LA series was eventually replaced by the E series in 2018, but the LA100 remains a popular choice for homeowners seeking reliable lawn care.

Frequently Asked Questions

What size deck does the John Deere LA100 have?

The John Deere LA100 comes standard with a 42-inch mower deck, designed for efficient mowing of medium-sized lawns.

What engine is in the John Deere LA100?

The John Deere LA100 is powered by a 17 horsepower Briggs & Stratton single-cylinder engine.

What belt do I need for my John Deere LA100?

The John Deere LA100 uses a 42-inch deck belt. Refer to your John Deere parts manual for the correct OEM part number (typically M154621 or GX20072) or measure the existing belt to find a suitable aftermarket replacement. A drive belt connects the engine to the transmission. See your parts manual for the exact drive belt required for your LA100.

What blades fit the John Deere LA100?

The John Deere LA100 requires two 21-inch mower blades for its 42-inch deck. Ensure you purchase blades that are compatible with John Deere mowers, typically with a 5-point star center hole.

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