UDC Parts 48-Inch Replacement Mower Blades 3-Pack for Exmark Decks — Direct Fit, Restores Cutting Performance

UDC Parts 103-6401 is a three-pack of 48-inch replacement mower blades engineered to fit specific Exmark decks and models as a direct aftermarket alternative.

These replacement blades are crafted to match the critical dimensions and mounting pattern of Exmark 103-6401 series blades so you can restore cutting performance without buying OEM parts. The listing covers multiple part numbers and many Exmark mower families, but compatibility depends on exact model and serial ranges. Before ordering, verify your mower’s OEM part number and the blade measurements to ensure a proper fit.

Which Exmark models and parts do these blades replace?

These UDC Parts blades are designed to replace a range of Exmark OEM numbers and fit numerous Exmark walking and zero-turn machines. They cover both standard and “-S” variants listed in OEM catalogs and align with decks specified as 48-inch.

• Replaces OEM: 103-6401, 103-6401-S and related 116-5177, 103-6381, 103-6391, 103-6396 series.
• Compatible with Exmark Quest, Quest X-Series, Quest SP, Pioneer E-Series and Turf Tracer models detailed in the compatibility list.
• Works with many model/serial combinations—always confirm exact OEM match before purchase.

What are the exact blade dimensions and mounting details?

UDC Parts provides precise measurements so you can compare these blades to your current cutters. The dimensions follow Exmark’s layout to maintain proper air lift and cutting geometry for a 48" deck.

• Total length (diagonal): 16-1/4".
• Blade width: 2-1/2" and center hole circle: 1".
• Air lift height: 1"; cutting edge length approximately 5-29/32" to match deck performance.

How do these replacement blades affect cutting performance and maintenance?

When matched correctly to your deck, these blades restore the blade profile and air flow needed for consistent bagging, discharge, and mulching performance. Using properly sized blades also helps reduce vibration and wear on spindle hardware.

• Re-establish correct cutting height and even grass shearing when installed correctly.
• Maintain air lift geometry for efficient clipping movement and discharge.
• Three-blade pack lets you replace all blades at once for balanced operation.

Do I need to make any adjustments after installing these blades?

After installation, basic checks and quick adjustments help ensure safe, optimal operation. No special modifications are required when the OEM match and measurements line up.

• Check blade balance and torque spindle nuts to manufacturer specs.
• Inspect deck clearance and level across the deck before first use.
• Start with a short test cut and re-check for vibration or unusual noise.

Who is this for: UDC Parts 103-6401 3-pack is intended for owners and technicians of Exmark residential and commercial mowers who need an affordable, dimensionally accurate replacement for worn or damaged 48" blades. It’s a practical option for landscapers, groundskeepers, and homeowners who prefer to replace all three blades at once to restore balance and cutting quality. Remember: this product fits specific Exmark models and part numbers—confirm OEM compatibility and measurements before purchasing to avoid returns.