Exmark 103-6403-S Notched Blade | OEM 60 Inch Mower Blade 20.5 (.94 HOLE)

Exmark 103-6403-S Notched Blade - OEM Replacement Mower Blade

The Exmark 103-6403-S Notched Blade is a genuine OEM Exmark replacement mower blade built for clean cutting performance, durability, and proper fit on compatible Exmark mower decks. This factory-style notched blade is designed to deliver excellent cut quality in most normal mowing conditions.

Exmark notched blades are commonly used as a reliable all-around blade option for professional landscapers and residential users who want a clean, even cut. The notched blade design helps provide proper lift, clipping movement, and balanced operation when installed on the correct Exmark deck.

This blade replaces previous Exmark blade numbers 103-6403 and 103-6403-SU. Always verify blade length, center hole, deck size, model number, serial number, and parts diagram before ordering.

Product Details

Key Features

• Genuine OEM Exmark replacement mower blade
• Part number 103-6403-S
• Replaces Exmark 103-6403 and 103-6403-SU
• Factory notched blade design
• Excellent all-around blade for most normal grass conditions
• Helps provide clean, even cutting performance
• Designed for balanced operation on compatible Exmark decks
• Manufactured for OEM fit, durability, and cut quality
• Good choice for professional and residential mowing applications

Check Common Model Fitment

Use the dropdown sections below to review common Exmark model families associated with Exmark 103-6403-S Notched Blade. This is a simplified fitment guide for easier shopping and is not a guarantee of fitment. Always verify with your full Exmark model number, serial number, mower deck size, original blade number, and parts diagram before ordering.

Important: The dropdown fitment guide is a simplified reference only. Exmark 103-6403-S fits many machines, but compatibility depends on your exact model, serial number, deck size, blade style, and parts diagram.

Replaces / Cross Reference

Exmark 103-6403-S replaces the following previous Exmark OEM blade numbers:

• 103-6403
• 103-6403-SU

If your parts diagram lists 103-6403 or 103-6403-SU, Exmark 103-6403-S is the current replacement blade.

Why Choose an OEM Exmark Blade?

Genuine Exmark blades are engineered for the correct fit, lift, balance, and cutting performance on compatible Exmark mower decks. Using the correct OEM blade helps maintain cut quality, reduce vibration, protect spindle assemblies, and support proper deck performance.

This notched blade is a strong factory-style option for general mowing and is commonly considered the best blade choice for many normal grass conditions.

Blade Maintenance

Sharpen blades regularly and inspect them for nicks, bends, cracks, excessive wear, or impact damage. Dull or damaged blades can reduce cut quality, tear grass, increase vibration, and put added stress on spindle assemblies.

Replace blades promptly if they are bent, cracked, severely worn, out of balance, or damaged from hitting rocks, roots, curbs, or other objects.

Important Fitment Note

Exmark 103-6403-S fits select Exmark mower models only. Fitment can vary by model, serial number, deck size, deck type, blade style, and parts diagram.

Before ordering, confirm:

• Your full Exmark model number
• Your Exmark serial number
• Your mower deck size
• Your original blade part number
• Your Exmark parts diagram
• Whether your mower uses Exmark 103-6403-S

If you are unsure, contact P&P Small Engines with your full model and serial number before ordering.

Part Number / Search Terms

Exmark 103-6403-S may also be searched as:

• 103-6403-S
• 1036403S
• Exmark 103-6403-S
• Exmark 1036403S
• 103-6403
• 1036403
• 103-6403-SU
• 1036403SU
• Exmark notched blade
• Exmark mower blade
• Exmark 60 inch mower blade
• Exmark factory blade
• Exmark Lazer Z blade
• Exmark Radius blade
• Exmark Pioneer blade
• Exmark Staris blade
• Exmark Turf Tracer blade
• Exmark Vantage blade
• Exmark Vertex blade
• Exmark Front Runner blade

Frequently Asked Questions

Is Exmark 103-6403-S an OEM blade?

Yes. Exmark 103-6403-S is a genuine OEM Exmark notched mower blade.

What does Exmark 103-6403-S replace?

Exmark 103-6403-S replaces previous Exmark OEM blade numbers 103-6403 and 103-6403-SU.

What deck size is this blade commonly used on?

This blade is commonly associated with select 60 inch Exmark mower decks. Always verify by full model, serial number, deck size, and parts diagram.

What is a notched blade used for?

A notched blade is a factory-style general mowing blade designed to provide clean cutting performance and good lift in many normal grass conditions.

When should I replace my mower blade?

Replace the blade if it is bent, cracked, badly worn, out of balance, or no longer sharpens correctly. Damaged blades can cause vibration and poor cut quality.

Can I order this blade without checking my model?

No. Always verify your full Exmark model number, serial number, deck size, original blade number, and parts diagram before ordering.

P&P Small Engines stocks genuine Exmark mower blades, belts, spindles, pulleys, idlers, hydro filters, and commercial mower maintenance parts to help keep your equipment ready to work.