Stens Hi-Lift Blade 335-665 for MTD 942-0640

What It Is

The Stens Hi-Lift Blade 335-665 is an aftermarket replacement blade designed for MTD-branded lawn tractors and zero-turn mowers. Its high-lift profile increases airflow for superior grass discharge and bagging performance, making it ideal for thick or wet grass.

Fitment & Compatibility

Before buying, confirm your mower’s deck size is 42 inches (this blade is 20.5 inches long with a 1-inch center hole and 7-point star drive). It directly replaces OEM MTD 942-0640 and fits many MTD, Cub Cadet, Troy-Bilt, and Yard Machines models with 42-inch decks. Check your mower’s model number and deck type (side-discharge or bagging) — this blade is not for mulching. Measure your existing blade’s length, center hole, and drive pattern; if they match, it’s compatible.

Key Things to Know

• Quality: Stens blades are heat-treated and hardened for durability, with a balanced design that reduces vibration. They typically outlast low-cost generic blades.
• Installation: Moderate difficulty — requires a socket wrench and blade removal tool. Torque blade bolts to 70-90 ft-lbs. Always lift the mower deck safely and disconnect the spark plug.
• Common gotchas: Hi-lift blades create more lift, which can strain the engine in extremely tall or wet grass — avoid overloading. They also generate more debris, so wear eye protection.
• Check deck clearance: Hi-lift blades need adequate space inside the deck; if your deck is shallow, they may cause contact or poor cutting.

Should You Buy It

Buy this if you have a 42-inch MTD-compatible mower and prioritize maximum bagging or side-discharge performance in thick grass. It’s a solid upgrade over standard blades for efficiency, but skip it if you mainly mulch or have a smaller deck.