Keycci 103-6403 Hi Lift Mower Blade Compatibles with Ex Mark L Azer Z 60 Inch Deck, 103-6403-S Heavy Duty Mower Blade for Ex Mark L Azer Z XP AS XS E-Series S-Series, 3 Pack

What It Is

The Keycci 103-6403 Hi Lift Mower Blade is a heavy-duty aftermarket replacement blade designed for Ex Mark Lazer Z series mowers with a 60-inch deck. It’s built for high-lift grass discharge and mulching performance.

Fitment & Compatibility

Before buying, confirm your mower model and deck size. This blade is compatible with Ex Mark Lazer Z models: L, Azer Z, XP, AS, XS, E-Series, and S-Series, all with a 60-inch deck. It replaces OEM part 103-6403-S. Measure your existing blade length (should be ~20.5 inches), center hole diameter (~0.75 inches), and thickness (0.203 inches). Check your deck’s blade pattern—this is a 3-pack, so ensure your deck uses three blades (common on 60-inch Ex Mark decks). Not for 48-inch or 52-inch decks.

Key Things to Know

• Quality vs OEM: Keycci blades are made from heat-treated carbon steel for durability, but they may be slightly thinner than OEM Ex Mark blades—expect a small trade-off in lifespan for lower cost.
• Installation: Easy swap with basic tools (wrench and socket). Use a torque wrench to tighten to 70-90 ft-lbs. Always lift the deck safely or remove the mower deck for access.
• Gotcha: Hi-lift blades require more engine power and can cause clumping in wet grass. Best for dry, tall grass or heavy-duty cutting—not for fine lawn finish.
• Balancing: They come pre-balanced, but check with a blade balancer before installing to avoid vibration and spindle wear.

Should You Buy It

If you own a 60-inch Ex Mark Lazer Z and need affordable, high-lift blades for heavy grass or thick conditions, this 3-pack is a solid value. It’s a good budget alternative to OEM, but skip it if you want premium finish or mow in wet grass often.