103-6397 Mulching Blades Compatible with 52" Toro Lawn Mowers, 116-5175 Mower Blades Compatible with Ex mark 52" Lazer Z Turf Tracer, Replace for 103-6387, 103-6402, 109-6873, 103-6382, 3 Pack

What It Is

This is a 3-pack of mulching blades designed to replace OEM blades on 52-inch zero-turn mowers, specifically Toro and Exmark models. They cut grass into fine clippings that decompose quickly, eliminating the need for bagging.

Fitment & Compatibility

• Deck size: Only fits 52-inch cutting decks. Measure your deck width before ordering—52 inches is the overall cut, not the blade length.
• Models: Direct replacement for Toro 103-6387, 103-6402, 109-6873, 103-6382 and Exmark 116-5175. Fits Toro 52" TimeCutter, Z Master, and Exmark Lazer Z, Turf Tracer, and Quest.
• OEM vs aftermarket: These are aftermarket, not genuine Toro/Exmark. They match OEM specs (center hole, thickness, lift) but may vary slightly in balance or coating.
• Measurements: Each blade is approximately 18 inches long, 2.5 inches wide, with a 1-inch center hole and a 0.25-inch spindle hole. Verify your existing blade’s length and hole pattern.
• Check before buying: Confirm your mower’s deck model number (e.g., 52-inch Toro TimeCutter SS4225) and that it uses a 3-blade, mulching-style setup. Not for side-discharge or bagging-only decks.

Key Things to Know

• Quality: Rated 4.7 stars from 25 reviews—users report they cut well and hold an edge for 1-2 seasons with normal use. Some note they’re slightly lighter than OEM, which may reduce blade tip speed.
• Installation: Moderate difficulty. Requires a socket wrench, torque wrench (set to 70-90 ft-lbs), and a blade removal tool or block of wood to prevent spinning. Always disconnect the spark plug first.
• Common gotchas: These are mulching blades only—don’t use for bagging unless you want clumps. The 3-pack may include one blade that’s slightly bent or unbalanced; check each with a blade balancer before mounting.
• Warranty: No manufacturer warranty (aftermarket). Test fit on one spindle before installing all three.

Should You Buy It

If you own a 52-inch Toro or Exmark zero-turn and want a budget-friendly mulching upgrade, this pack saves you roughly 30% vs. OEM. It’s best for homeowners or light commercial use on fine fescue or Bermuda—not for heavy-duty commercial mowing or wet, thick grass.