I pulled this from online because it uses less words than I would. Maybe it will clarify things. "When it comes to measuring power output for a lawnmower engine, torque is often a more accurate measurement than horsepower. Let me explain why:
- Torque vs. Horsepower:
- Horsepower (HP): Traditionally, lawn mower power was measured in horsepower. One horsepower is equal to 33,000 foot-pounds per minute. However, horsepower only calculates the overall work the engine can produce.
- Torque: Torque, on the other hand, measures the rotational force produced by the engine. Specifically, it quantifies the power involved in turning the mower’s rotary blades. When you mow the lawn, the blades rotate and twist to cut the grass. The amount of power used for this action is known as torque1.
- Why Torque Matters for Lawn Mowers:
- Rotary Blades: When the mower’s blades are turned on, you’re witnessing an example of torque. Torque is essential for spinning the blades and allowing them to cut through grass.
- Bogging Down: Lawn mowers with higher torque are less likely to get bogged down when cutting thick or long grass. More torque means more force delivered to the blade, making it easier to handle challenging conditions.
- Gross Torque: Walk-behind lawn mowers typically have a power rating expressed in gross torque, not gross horsepower. This emphasizes the engine’s capability to turn the blade effectively1.
- Choosing the Right Torque:
- Consider your specific needs:
- Yard Size: If you have a small, flat yard that you mow regularly, a mower with 4.50 to 5.50 ft-lbs of torque should suffice.
- Grass Thickness: For larger yards with tall or thick grass, opt for a mower with more torque.
- Longevity: The torque you choose directly affects the mower’s ability to complete the job and improve the motor’s lifespan. While torque alone isn’t the sole consideration, it’s essential when selecting a lawn mower. In summary, while horsepower remains crucial for riding lawn mowers, push lawn mower owners often prioritize torque. So, when evaluating lawnmower power, keep torque in mind—it’s the force that keeps those blades spinning
- Consider your specific needs: