Exmark 103-6404-S Notched Blade Set Lazer Z AC AS LC XP XS E S X Series 72 Inch

What It Is

This is an OEM Exmark notched blade set designed specifically for 72-inch cutting decks on Exmark Lazer Z, AC, AS, LC, XP, XS, E, S, and X Series mowers. The notched design helps improve airflow and mulching performance, making it ideal for commercial or heavy residential use.

Fitment & Compatibility

Before buying, verify three things:

• Deck size – Must be exactly 72 inches. This set includes three blades (one per spindle).
• Model series – Fits Lazer Z, AC, AS, LC, XP, XS, E, S, and X Series. Check your mower’s model number (e.g., LZAC72, XP72) to confirm.
• Blade dimensions – Each blade is 24.5 inches long, 2.5 inches wide, with a 0.25-inch center hole and a 0.75-inch offset. Notched style (not smooth or high-lift).
• OEM part number – This is Exmark 103-6404-S. Aftermarket blades may vary in thickness or balance. Always cross-reference your current blade’s part number.

Key Things to Know

• Quality – OEM Exmark blades are heat-treated and balanced for durability. Expect longer life than generic alternatives.
• Installation difficulty – Moderate. You’ll need a socket wrench and a torque wrench (recommended 70-90 ft-lbs). Lift the deck safely and use a blade removal tool to prevent spinning.
• Common gotcha – Notched blades are not universal. They’re optimized for Exmark’s deck design; using them on other brands may reduce cut quality or cause vibration.
• Maintenance – Sharpen or replace when nicked or dull. Always replace as a set to maintain balance.

Should You Buy It

Yes, if you own a compatible Exmark 72-inch deck and want reliable OEM performance. The price is premium but justified for commercial-grade durability, consistent cut quality, and proper fit. Skip if you’re on a tight budget or using a different brand deck—aftermarket options may work but risk fitment issues.