Exmark 103-4209 OEM Left-Hand Mower Blade | Navigator 42
Maintain clean, consistent cutting performance with the genuine Exmark 103-4209 Left-Hand Mower Blade. Designed to Exmark factory specifications, this OEM blade provides the correct fit, balance, and cutting action for compatible 42-inch Navigator mower decks. Whether you're replacing a damaged blade or performing routine maintenance, the Exmark 103-4209 delivers the durability and dependable performance your mower was designed to use.
Fits Exmark Navigator 42-Inch Mowers
This genuine Exmark left-hand mower blade fits select Exmark Navigator models equipped with 42-inch mower decks, including compatible Navigator applications from 2011 and newer. Use the fitment list below and verify your model, serial number, and blade position before ordering.
View Complete Fitment List (5 Models)
- NAVIGATOR – NV640KC42 – Serial 313000000-314999999
- NAVIGATOR – NV730EKC42 – Serial 313000000-314999999
- NAVIGATOR – NVS640CKC42000 – Serial 315000000-399999999
- NAVIGATOR – NVS740CKC42000 – Serial 400000000-417930745
- NAVIGATOR – NVS740GKC42000 – Serial 416150475-420130747
Exmark Navigator 42 Inch Left-Hand Blade Replacement
The Exmark 103-4209 is a genuine OEM left-hand replacement blade designed for compatible Exmark Navigator 42-inch mower decks. It is engineered for the correct blade position and rotation, helping maintain proper cutting performance, smooth operation, and consistent results across the deck.
Product Details
- Genuine Exmark OEM Mower Blade
- Part Number: 103-4209
- Blade Position: Left-Hand
- Designed for compatible Exmark Navigator 42-inch mower decks
- Fits select Navigator applications from 2011 and newer
- Engineered for the correct blade position and rotation
- Precision balanced for smooth operation
- Built to Exmark factory specifications
- Direct replacement for the original left-hand blade
Why Choose Genuine Exmark OEM Blades?
Genuine Exmark mower blades are engineered specifically for your mower deck to provide the correct dimensions, rotation, balance, and cutting performance. Unlike many aftermarket alternatives, OEM blades are manufactured to Exmark's exact specifications for dependable performance, proper fit, and long service life.
Replace mower blades when they become bent, cracked, excessively worn, or can no longer hold a sharp cutting edge. Installing genuine Exmark OEM blades helps maintain cut quality and smooth mower operation while reducing unnecessary wear on deck and spindle components.
Important: This is the left-hand blade for compatible 42-inch Navigator mower decks. Verify your model, serial number, and required blade position before ordering, as the other blade position may use a different part number.
Genuine Exmark Parts
Genuine Exmark OEM parts are built for commercial performance. Engineered to factory specifications, they deliver precise fit, long lasting durability, and the reliability professionals depend on. Protect your investment and minimize downtime with parts designed specifically for your Exmark machine.
Get Everything You Need
View the complete parts diagram for your machine. Find related maintenance items, replacement parts, and hardware before placing your order.










