Lawn Mower Deck Blades for John Deere AM141034 AM141037 AM137329 M154062 42 inch Deck X300 X304 2 Pack

What It Is

This is a 2-pack of replacement lawn mower deck blades designed for 42-inch cutting decks on select John Deere X300 and X304 series tractors. They’re intended for standard residential mowing—grass, light weeds, and occasional leaf mulching.

Fitment & Compatibility

Before buying, confirm three things:

• Deck size: Your mower must have a 42-inch deck (not 48 or 54). Measure deck width if unsure.
• OEM cross-reference: These blades replace John Deere part numbers AM141034, AM141037, AM137329, and M154062. Check your owner’s manual or existing blade for one of these numbers.
• Physical dimensions: Each blade is approximately 21 inches long with a 1-inch center hole and 0.25-inch thickness. Measure your old blade’s length, hole size, and thickness to verify match. The blade shape is flat with a slight lift—not a mulching or gator style.
• Models: Fits X300, X304, X305R, X310, X320, X324, X330, X340, X350, X354, X360, X370, X380, X384, X390, X394, and select LA series (LA105, LA115, LA125, LA135, LA145, LA155, LA165, LA175) with 42-inch decks. Double-check your specific model number.

Key Things to Buy

• Quality: Aftermarket blades at this price are likely stamped steel, not forged. They’ll work for normal use but may dull faster than OEM or premium brands. Inspect for burrs on the cutting edge before installation.
• Installation difficulty: Easy—requires a socket wrench (typically 5/8-inch or 15/16-inch) and a block of wood to prevent blade spin. Always disconnect the spark plug first. Torque bolts to 60-70 ft-lbs.
• Common gotchas: These are standard lift blades, not high-lift or mulching. If you bag clippings, expect less airflow than OEM high-lift blades. Also, the coating is basic—rust may appear quickly if you store the mower wet.
• Pack size: 2-pack is enough for a single deck replacement (most 42-inch decks use two blades). Confirm your deck uses two, not three.

Should You Buy It

If you need a budget-friendly, drop-in replacement for a John Deere 42-inch deck and you’re okay with slightly faster wear than OEM, this 2-pack is a solid value. It’s right for homeowners with X300/X304 series tractors doing routine mowing. Skip it if you need high-lift blades for bagging or premium steel for heavy-duty commercial use.