103-6396 Mulching Mower Blades Compatible with 48" Deck Toro Exmark HP Lazer Z Quest Turf Tracer Vantage Lawn Mowers,Replace 103-6391 103-6401 109-6872 103-6381 116-5177,3 Pack

What It Is

This is a 3-pack of mulching blades designed for 48-inch cutting decks on Toro and Exmark commercial zero-turn mowers. They replace OEM part numbers 103-6391, 103-6401, 109-6872, 103-6381, and 116-5177, and are intended for heavy mulching in grass up to 6 inches tall.

Fitment & Compatibility

Check these before buying:

• Deck size: Only fits 48-inch decks. Measure your deck width edge-to-edge to confirm.
• Models: Compatible with Toro Z Master, Exmark HP, Lazer Z, Quest, Turf Tracer, and Vantage series with a 48" deck. Not for 42", 52", or 60" decks.
• Blade dimensions: Each blade is roughly 21 inches long, 2.5 inches wide, with a 1-inch center hole and 0.5-inch offset. Confirm these match your current blade.
• OEM vs aftermarket: These are aftermarket replacements. OEM Toro/Exmark blades (e.g., 103-6391) are identical in fit but may cost more. Verify your spindle bolt pattern (usually 5/8" or 7/16") matches.

Key Things to Know

• Mulching performance: The curved wing design lifts clippings for finer cut. Works best with sharp blades and dry grass—wet grass clogs easily.
• Installation: Easy with a socket wrench and torque wrench (recommended torque: 70-90 ft-lbs). Always tighten in a star pattern to avoid wobble.
• Common gotcha: These blades are thinner than some OEM options (about 0.2 inches). They may wear faster in sandy or rocky soil.
• Balance: Always balance new blades before mounting. An unbalanced blade causes vibration, poor cut, and spindle damage.

Should You Buy It

If you have a 48-inch Toro or Exmark zero-turn and need affordable mulching blades that match OEM fitment, this 3-pack is a solid value. It’s ideal for homeowners or light commercial use, but heavy-duty operators may prefer thicker OEM blades for longer life.