Terre Products, 3 Pack Toothed Mulching Lawn Mower Blades, 48" Decks, Compatible with Ferris 5020843, Exmark 1520843, 103-2527, Ariens 4919100, Husqvarna 539101496, Simplicity 5020843SM

What It Is

This 3-pack of toothed mulching blades is designed for 48-inch zero-turn mower decks, converting grass clippings into fine mulch for nutrient recycling. They fit popular commercial and residential brands like Ferris, Exmark, Ariens, Husqvarna, and Simplicity.

Fitment & Compatibility

Before buying, confirm your deck measures exactly 48 inches (center spindle to center spindle). These blades replace OEM part numbers: Ferris 5020843, Exmark 1520843, 103-2527, Ariens 4919100, Husqvarna 539101496, and Simplicity 5020843SM. Measure your existing blade length, width, center hole diameter (typically 1-inch), and thickness to match. This is an aftermarket part—check that your spindle hole size and blade offset match your mower. Not all 48-inch decks use the same blade geometry; verify by comparing your current blade’s shape and mounting holes.

Key Things to Know

• Quality: Made from heat-treated steel with a toothed edge for finer mulching. Users report good durability but inspect for burrs before installation.
• Installation difficulty: Moderate. Requires jacking up the deck, removing the center bolt (often left-hand thread), and torquing to spec (typically 70-90 ft-lbs). Use a blade lock or block of wood to prevent spinning.
• Common gotchas: Toothed blades need sharpening more often than standard blades. Not for bagging or side-discharge; they work best with a mulching plug installed. Balance each blade after sharpening to avoid vibration.
• Packaging: Comes as a 3-pack—enough for a full deck replacement. Check that all three are identical; some decks use different blade lengths for the center vs. outer spindles.

Should You Buy It

If you have a 48-inch commercial zero-turn from Ferris, Exmark, Ariens, Husqvarna, or Simplicity and want to improve mulching performance without paying OEM prices, this 3-pack is a solid value. It’s not for standard lift blades or decks over 48 inches. Best for operators who mow frequently and want finer clippings, but be prepared for more frequent sharpening.