John Deere Original Equipment Model X300 Maintenance Kit + Standard Blades

What It Is

This is a John Deere Original Equipment (OEM) maintenance kit for X300 series lawn tractors, including two standard (non-mulching) blades and the necessary service items (oil filter, fuel filter, air filter, spark plug, and washer) for a single annual engine service.

Fitment & Compatibility

Check deck size first: This kit is designed for 48-inch (48A/48C) mower decks on X300, X304, X310, X320, X324, X340, X360, and X380 models. It will not fit 42-inch or 54-inch decks.
OEM vs aftermarket: These are genuine John Deere parts (blade part # M155634, filter # AM125424, etc.). Aftermarket blades may be cheaper but often require adjusting blade timing or have slightly different hole alignment. The kit is a direct bolt-on for OEM decks.
Measurements: Standard blades are 18.5 inches long, 2.5 inches wide, with a 1-inch center hole and 0.5-inch offset. Confirm your existing blade matches these dimensions before buying.

Key Things to Know

• Installation difficulty: Moderate. Requires basic hand tools (socket wrench, blade removal tool or block of wood). Expect 30–60 minutes for full service.
• Only standard blades included: If you want mulching or bagging blades, you must buy them separately. These are for side-discharge only.
• Blade bolt torque: Tighten to 75–90 ft-lbs. Overtightening can strip the spindle; undertightening can cause blade throw.
• Common gotcha: The kit does not include a new fuel line or carburetor gaskets. If your mower sat with old gas, you may still need a carb clean.

Should You Buy It

Yes, if you own a 48-inch-deck X300 series and want a guaranteed fit, one-stop service pack with OEM quality (especially the filters and spark plug). It’s overkill if you only need blades—but for a full annual service, it saves time and shipping costs. Skip it if you need mulching blades or have a 42-inch/54-inch deck.