K5613-34340 Mower Blade Fit for Kubota 54" Deck KW421-3, Z422KW, Z724-3, RCK54P-400Z, RCK54P-781Z Lawn Mower High Lift Blade Replaces K5613-34340 (3 Pack)

What It Is

This is a 3-pack of high-lift mower blades designed for Kubota 54-inch decks. High-lift blades create stronger upward airflow to improve grass clipping discharge and bagging performance, making them ideal for mulching or collecting leaves.

Fitment & Compatibility

• Deck size: Only fits 54-inch Kubota decks. Measure your blade length—these are 18.5 inches long with a 1-inch center hole and 5-point star drive.
• Models verified: Kubota Z422KW, Z724-3, and KW421-3 zero-turn mowers; also fits RCK54P-400Z and RCK54P-781Z belly-mount deck models.
• OEM vs aftermarket: Direct replacement for K5613-34340. Aftermarket, not OEM Kubota, but uses same bolt pattern and thickness.
• Check before buying: Confirm your current blade’s part number ends in 34340. Verify deck model tag (not just mower model) to avoid 48” or 60” deck mismatch.

Key Things to Know

• Installation: Easy swap with a socket wrench and torque to 50-60 ft-lbs. Use thread locker on bolts if not new.
• Performance: High-lift design increases bagging efficiency but may create more dust on dry lawns. Not ideal for side-discharge only.
• Durability: Heat-treated steel, but some users report faster edge dulling on rocky terrain compared to OEM.
• Gotcha: The 3-pack covers a 54” deck (2 outer, 1 center). If your deck uses 2 blades (e.g., 48”), this won’t fit.

Should You Buy It

If you bag clippings or need aggressive lift on a Kubota 54” deck, this is a solid budget-friendly choice. Avoid if you only side-discharge or mow rocky soil—the high-lift design and edge wear won’t suit those conditions.