Exmark 103-6403-S Notched Blade Lazer Z AS CT XP LC Pioneer Vantage Turf Tracer Staris Front Runner E S X Series 3 Pack

What It Is

The Exmark 103-6403-S is a set of three OEM notched blades designed for Exmark zero-turn mowers, optimized for high-lift grass discharge and mulching on commercial and residential turf.

Fitment & Compatibility

Before buying, verify your deck size and model: these blades fit 60-inch and 72-inch cutting decks on Exmark Lazer Z, Lazer Z AS, Lazer Z CT, Lazer Z XP, Lazer Z LC, Pioneer, Vantage, Turf Tracer, Staris, Front Runner, E, S, and X Series mowers. Measure your current blade length (should be 20.5 inches), width (2.5 inches), center hole diameter (5/8 inch), and notch pattern—this is the OEM replacement, so aftermarket alternatives must match these specs. Confirm your mower’s part number cross-references to 103-6403-S; check your owner’s manual or existing blade stamp.

Key Things to Know

• Quality: OEM Exmark blades are heat-treated and balanced for durability; they resist bending on debris but will dull faster on sandy soil.
• Installation: Easy with a socket and torque wrench (35-45 ft-lbs); always replace all three blades at once to avoid vibration.
• Common Gotchas: Notched design is for high-lift airflow—using on a mulching-only deck may reduce bagging efficiency. Inspect spindles and bolts for wear before installing new blades.
• Performance: Provides a clean cut on thick grass but may leave clumps if mowing wet turf; sharpen every 25 hours for best results.

Should You Buy It

If you own a compatible Exmark zero-turn and need a direct OEM replacement for consistent cut quality and durability, this three-pack delivers reliable performance for commercial or heavy residential use—just verify your deck size and model to avoid fitment issues.