MaxPower 561167B 3-Blade Set for 72" Exmark Mowers Replaces 103-6404, 103-6404-S

What It Is

This is a set of three aftermarket blades designed for 72-inch Exmark mower decks, intended for high-capacity commercial mowing. It replaces OEM part numbers 103-6404 and 103-6404-S.

Fitment & Compatibility

Crucial check: This set fits Exmark Lazer Z, Lazer Z XP, and Ultra Vac models with a 72-inch deck only. Measure your deck width—this will not fit 60-inch or smaller decks. Verify your OEM blade part number matches 103-6404 or 103-6404-S. Aftermarket blades may have slight dimensional differences; measure the blade length (should be 24.5 inches) and center hole diameter (usually 5/8 inch) against your old blade. Also confirm the blade thickness matches—thicker blades may not clear the deck or spindle.

Key Things to Know

• Quality concerns: With only 2 reviews and a 3.0 rating, there’s limited user feedback. Some aftermarket blades may not hold an edge as long as OEM Exmark blades.
• Installation difficulty: Moderate. You’ll need a torque wrench and a blade removal tool. Tighten to 70-90 ft-lbs (check your deck manual). Never reuse old bolts or washers.
• Balance check: Aftermarket blades often require balancing before installation. Use a blade balancer to avoid vibration that can damage spindles.
• Cut quality: Expect a clean cut on grass, but if you mow in sandy or rocky conditions, these may dull faster than OEM hardened steel blades.

Should You Buy It

Buy this set if you need a budget-friendly replacement for a 72-inch Exmark commercial mower and are comfortable checking fitment and balancing blades yourself. Skip it if you demand the longest blade life or need a perfect OEM match—consider OEM Exmark blades or higher-rated aftermarket options instead.