John Deere Original Equipment Model X300 Maintenance Kit + Standard Blades

What It Is

This John Deere Original Equipment (OEM) Maintenance Kit (part number M155176) includes everything needed for a full-season service on X300 series lawn tractors: two standard 48-inch deck blades, two air filters, a fuel filter, a spark plug, and an oil filter. It’s designed for routine blade replacement and engine maintenance in one box.

Fitment & Compatibility

Check these before buying:

• Deck size: This kit is specifically for 48-inch (48C) cutting decks. It will not fit 42-inch or 54-inch decks.
• Model series: Fits John Deere X300, X304, X310, X320, X324, X330, X340, X350, X360, X370, X380, X390, X394, and X584 tractors. Does not fit X500 series or older LX/GT models.
• Blade dimensions: Standard blades measure 18.5” long x 2.5” wide with a 1.0” center hole and 0.5” offset. Measure your existing blades to confirm.
• OEM vs aftermarket: This is genuine John Deere kit—no cross-brand compatibility. Using non-OEM filters or spark plugs may void warranty or cause poor fit.

Key Things to Know

• Installation difficulty: Moderate. Requires basic tools (socket wrench, spark plug gap gauge, oil filter wrench). Allow 45–60 minutes.
• Blade orientation: The “L” or “R” stamp on blades indicates left/right rotation for John Deere’s dual-blade system. Install with the cutting edge facing the direction of rotation (toward the front of the deck).
• Spark plug gap: The included Champion RC12YC plug comes pre-gapped, but always verify gap is 0.030” (0.76 mm) before installing.
• Oil filter torque: Tighten the oil filter by hand only—over-tightening can damage the housing seal.

Should You Buy It

If you own a John Deere X300 series with a 48-inch deck and want a single, OEM-validated kit for annual blade and engine maintenance, this is a convenient, time-saving choice. It’s not for non-John Deere tractors, smaller decks, or budget shoppers seeking aftermarket alternatives.