48 inch Mower Mulching Blade for Ferris 5020843, for Ariens 00273000 04919100 04920600 Exmark 1520843 103-2527 Zoom iZ4817 iZ4821 (3 Pack)

What It Is

This is a set of three 48-inch mulching blades designed to replace OEM part numbers Ferris 5020843, Ariens 00273000/04919100/04920600, and Exmark 1520843/103-2527. They fit select Ferris, Ariens, and Exmark zero-turn mowers with a 48-inch deck, cutting grass into fine clippings that decompose quickly.

Fitment & Compatibility

Before buying, confirm your deck size is exactly 48 inches—these blades won’t fit 36", 42", or 54" decks. Check your owner’s manual or current blade part number against the OEM numbers listed. These are aftermarket blades, not OEM, but match the original dimensions (length, width, center hole, and thickness). Measure your existing blade length—it should be 48 inches total (the blade itself, not the deck width). Also verify the center hole diameter (typically 1-inch or 7/8-inch) and the blade thickness (usually 0.25-inch). Models like the Exmark Zoom iZ4817 and iZ4821 are confirmed fits, but always double-check your specific model year.

Key Things to Know

• Quality vs OEM: At $31.99 for a 3-pack, these are budget-friendly. Expect slightly thinner steel and less precise balancing than OEM blades. You may need to balance them before installation.
• Installation difficulty: Moderate if you’ve changed blades before. Use a torque wrench to tighten to manufacturer specs (usually 70-80 ft-lbs). Always disconnect the spark plug first.
• Mulching performance: Works well for dry, short grass. In wet or tall grass, the mulching action may clog. Lift the deck or mow more frequently for best results.
• Common gotcha: The 48-inch blade is long—ensure your deck has the correct spindle spacing. Some 48-inch decks use a 3-blade setup, but verify your deck uses three blades (some use two). If yours uses two, this won’t fit.

Should You Buy It

Buy this if you own a compatible 48-inch Ferris, Ariens, or Exmark zero-turn and want an affordable mulching blade set for regular lawn maintenance. It’s a solid value for the price, but if you need maximum durability or precision for commercial use, stick with OEM blades. For homeowners with dry, short grass, these will work fine.