Stens 18" Notched Air-Lift Mower Blade — 3/4" Center, OEM Fit for Troy-Bilt Wide-Cut Decks

Stens 310-540 is an 18" notched air-lift mower blade engineered to fit specific Troy-Bilt wide-cut decks and restore reliable cutting and debris evacuation.

If your Troy-Bilt wide-cut mower needs a replacement blade that matches factory fit and lift characteristics, the Stens 310-540 notched air-lift blade is sized and drilled to the same specs as the original equipment. The blade combines a notched tip and an air-lift profile to support even grass flow into the deck discharge while maintaining deck balance and durability. Below you’ll find clear answers about fitment, installation, performance, and whether this blade suits your mower and mowing style.

Will this blade fit my Troy-Bilt wide-cut mower?

The Stens 310-540 is designed to replace Troy-Bilt part 1910917 and fits the listed wide-cut models directly. Confirm your deck width and spindle hole size before ordering to ensure correct mounting and clearance.

• Compatible models: Troy-Bilt 34087, 34087C, 34089, 34089C, 34342, 34343
• Deck fit: fits wide-cut decks—requires two blades for a 33" deck
• Center hole: 3/4" diameter center hole for direct spindle attachment

How does the notched air-lift design affect cutting and clippings?

The notched air-lift profile increases airflow under the deck so clippings evacuate more consistently to the discharge chute, reducing clumping and improving spread. The notch helps reduce resistance at the tip, which supports efficient rotation and maintains a steady lift across the blade span.

• Air-lift profile promotes consistent grass lift for an even cut
• Notched tips help reduce clumping and encourage cleaner discharge
• Helps maintain airflow for mulching or side-discharge setups when applicable

What are the physical specifications and material details?

The blade measures 18 inches long and 2 inches wide, with a thickness of 0.209 inches for robust durability. The stamped center hole is 3/4 inch to match the original Troy-Bilt spindle, and the blade is built to OEM-style tolerances for balanced rotation and longevity.

• Length: 18"; Width: 2"; Thickness: .209"
• Center hole: 3/4" for proper spindle fit
• Replaces Troy-Bilt part number 1910917 for direct swap

How do I install and maintain the blade safely?

Install by parking the mower on level ground, removing the key, and supporting the deck. Match blade orientation and torque the mounting bolt to the mower manufacturer’s specification; check balance and retorque after initial use. Periodic sharpening and inspection will extend blade life and preserve cut quality.

• Safety: disconnect spark plug and stabilize mower before service
• Installation: align 3/4" center hole and torque per mower manual
• Maintenance: sharpen as needed and replace if bent or excessively worn

Who is this for: The Stens 310-540 notched air-lift blade is intended for owners of compatible Troy-Bilt wide-cut mowers who want a direct-fit replacement with OEM-style airflow characteristics. It’s a good choice for homeowners and landscapers seeking consistent discharge performance, straightforward installation, and a durable blade that matches the original part number 1910917. If you run a 33" deck, remember to order two blades for full coverage.