XT (2) Pack 42" Gator Mulch Mower Blades fits John Deere Z225 Z235, LA125, LA135 592-615 Gxfc

What It Is

This is a 2-pack of XT 42-inch Gator mulching blades designed for select John Deere lawn tractors. They replace OEM part 592-615 and are meant for aggressive mulching, cutting grass into fine clippings that decompose quickly.

Fitment & Compatibility

• Deck size: Only fits 42-inch cutting decks. Measure your deck or check your mower’s model deck size before buying.
• Compatible John Deere models: Z225, Z235, LA125, LA135. Also fits several others (e.g., D100 series, LA100 series, X300 series with 42” deck).
• OEM replacement: Directly replaces John Deere part #592-615 (or Gxfc). These are aftermarket, not OEM.
• Measurements: Blade length is 21 inches, center hole is 1 inch, and spindle hole offset is 1 inch. Confirm these match your existing blades.
• Cross-check: Use John Deere’s online parts lookup with your mower’s serial number to verify compatibility.

Key Things to Know

• Mulching performance: The “Gator” wave design lifts grass and cuts it multiple times. Works best in dry conditions; wet grass may clump.
• Installation difficulty: Moderate. You’ll need a socket wrench and torque wrench (recommended 50-60 ft-lbs). Always disconnect the spark plug first.
• Sharpness: Blades come sharp but not razor-edge. They’ll dull faster in sandy or rocky soil.
• Gotcha: These are heavier than OEM blades—your engine may bog slightly in tall grass. Check blade balance after installation.

Should You Buy It

Yes, if you own a compatible John Deere 42” deck mower and want better mulching than standard blades. They’re a solid value at ~$31 per blade compared to OEM, but expect slightly more vibration and a bit more strain on the engine. Best for homeowners with medium-sized lawns who mulch regularly.