103-6401 Mower Blade Compatible with Ex Mark Lazer Z CT Tu rf Tra CER 48" Deck, Replaces for 103-6401-S, 3 Pack

What It Is

This is a three-pack of aftermarket mower blades (part number 103-6401) designed specifically for 48-inch cutting decks on Ex Mark Lazer Z, CT, Turf, and CER series zero-turn mowers. They replace OEM part 103-6401-S and are intended for standard residential or commercial mowing on turf, not for heavy brush or rough terrain.

Fitment & Compatibility

• Deck size: Only for 48-inch decks. Measure your deck width – these won’t fit 42”, 52”, 60”, or other sizes.
• Model fit: Confirmed for Ex Mark Lazer Z (including CT, Turf, CER). Not for other brands (e.g., Toro, John Deere) without verifying center hole diameter and blade length (likely 18”–19”).
• OEM vs aftermarket: These are non-OEM replacements for Ex Mark 103-6401-S. They may differ slightly in thickness, balance, or heat treatment.
• Measure before buying: Check blade length (from tip to tip), center hole diameter (typically 1” or 5/8”), and the distance between mounting holes. If your current blade is 103-6401-S, these should match.

Key Things to Know

• Installation difficulty: Easy – just a bolt and washer per blade. Use a torque wrench to tighten to 70–90 ft-lbs (check your mower manual). No special tools beyond a breaker bar or impact driver.
• Quality variance: Aftermarket blades can be thinner or slightly lighter than OEM. This may affect cut quality or blade lifespan, especially on heavy or wet grass.
• Sharpness: Blades come unsharpened or lightly sharpened. Expect to sharpen them yourself before first use for best results.
• Wear rate: With 3 blades per pack, you’ll replace all at once. Expect 15–25 hours of mowing before dulling, depending on conditions.

Should You Buy It

If you own an Ex Mark Lazer Z with a 48” deck and want a budget-friendly replacement for worn OEM blades, this 3-pack is a solid value. It’s best for routine mowing on well-maintained turf. Skip it if you demand OEM-grade durability or need blades for heavy-duty or extremely abrasive conditions.