John Deere Original Equipment Model LA115 Maintenance Kit + Mulching Blades

What It Is

This is a John Deere OEM maintenance kit for the LA115 lawn tractor, including a set of mulching blades, air filter, oil filter, fuel filter, spark plug, and a pre-measured oil bottle. It’s designed for a single annual service and optimal mulching performance on residential lawns.

Fitment & Compatibility

• Deck size: Only fits the LA115’s 42-inch stamped deck (model number usually ends in “42”). Measure your deck width to confirm.
• Blade dimensions: OEM blades are 16.5 inches long, 2.5 inches wide, with a 1-inch center hole and 0.5-inch offset. Aftermarket blades with different offsets or hole sizes will not fit.
• OEM vs aftermarket: This is genuine John Deere. Aftermarket kits are cheaper but may not match the exact blade thickness or filter specs—check your owner’s manual for cross-reference numbers.
• Other models: Not compatible with LA105, LA125, or LA130 due to different deck designs or engine specs. Double-check your tractor’s model tag under the seat.

Key Things to Know

• Installation difficulty: Moderate. You’ll need a socket wrench, torque wrench (blade bolts: 30–35 ft-lbs), and a jack or ramps to access the deck. Changing the oil filter is messy—have a drain pan ready.
• Mulching performance: The blades have a high-lift design that chops clippings finer than standard blades. Works best with dry grass; wet grass may clump even with this kit.
• Gotcha – spark plug gap: The included plug (OEM part AM137423) comes pre-gapped, but verify it’s 0.030 inches. Incorrect gap causes misfires.
• Filter compatibility: The air filter is a foam pre-cleaner + paper element. If your LA115 has an aftermarket air cleaner housing, the paper filter may not seat properly.

Should You Buy It

Buy this if you own a John Deere LA115 with a 42-inch deck and want a one-box solution for the season’s maintenance with guaranteed OEM fit and mulching performance. Skip it if you have a different model, prefer standard side-discharge blades, or are willing to piece together cheaper aftermarket parts—you’ll pay a premium for the convenience and the John Deere name here.