Oregon 3PK Gator 96-363 Blades Replacement for 60" Kubota K5647-34330 K5647-34340 Fits on ZD21, DZ28, ZD323, ZD331, ZG327, ZD326S, ZD21F-60P Models

What It Is

The Oregon 3PK Gator 96-363 is a set of three aftermarket mulching/side-discharge blades designed to replace OEM Kubota blades (K5647-34330, K5647-34340) on 60-inch zero-turn mowers, specifically Kubota ZD21, ZD28, ZD323, ZD331, ZG327, ZD326S, and ZD21F-60P models. They use Oregon’s Gator “wave” blade design for finer grass clipping shredding.

Fitment & Compatibility

• Deck size: Only fits 60-inch decks. Measure your deck width before ordering—these won’t work on 48" or 72" decks.
• OEM replacement: Direct drop-in for Kubota part numbers K5647-34330 (left) and K5647-34340 (right). Check your current blades for these numbers.
• Blade specs: 20.5" length, 3" width, 0.25" thickness, center hole diameter 0.75" (19mm). Confirm these match your existing blades.
• Model notes: Fits ZD21, ZD28, ZD323, ZD331, ZG327, ZD326S, ZD21F-60P—but verify your mower’s deck model (e.g., 60P suffix). Not compatible with older Kubota decks using 1" center holes.

Key Things to Know

• Quality: Oregon is a reputable aftermarket brand; blades are heat-treated and coated for rust resistance. They’re slightly heavier than OEM, which may improve cut quality but can increase engine load slightly.
• Installation: Straightforward if you have a torque wrench—tighten to 70-90 ft-lbs. Use a blade removal tool or block of wood to prevent spinning. No need for new hardware if existing bolts are in good shape.
• Common gotcha: The “wave” design is aggressive for mulching but can leave longer clippings in wet grass. Not ideal for bagging—consider flat blades if you bag frequently.
• Durability: Expect 25-50 hours of use depending on terrain and debris. Sharpen or replace sooner if you hit rocks or roots.

Should You Buy It

If you own one of the listed Kubota zero-turn mowers with a 60" deck, need a reliable aftermarket alternative to OEM blades (which cost 2-3x more), and want improved mulching action, this set is a solid choice. Avoid if you primarily bag clippings or have a non-Kubota deck with different hole sizes.