5.50 Gross Torque
Performance and value in one unbeatable package. You’ll love the smooth handling of the lightweight, yet powerful 550ex Series™ lawn mower engine. With a best-in-class torque-to-weight ratio, reduced vibration and quieter operation, you can give your lawn a class-A cut with ease. 550ex push mower engines come standard with Super Lo-Tone™ muffler and hassle-free ReadyStart® starting system.