The secret to a good rotary mower is its blade. The blade should be:

• A. Dull and cheap
• B. Heavy and curved
• C. Shiny and lightweight
• D. Sharp and the blade type designed for the mower for proper lift.

Answer: (D)

When a mower cuts well, the blade is doing two things at once: it is sharp enough to slice cleanly through the grass, and it is the blade type that fits the mower so it can create the right airflow to lift the grass for a proper cut. A sharp edge reduces tearing and ragged edges, giving an even, healthy-looking trim and reducing strain on the motor. The blade must be the correct design for that mower because the geometry and balance control how air moves under the deck to lift and feed clippings; using the wrong style or a blade not matched to the mower can cause poor lift, vibration, or damage. So the best choice is a blade that is sharp and the blade type designed for that mower to achieve proper lift and a clean cut.