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.
Powerful, yet economical. Performance and value rolled up into one unbeatable package.
Starts in 2 attempts – or we'll fix it for free.*
Safeguards engines against ethanol damage and maintains fuel stability for up to 3 years.
OHV engines run cooler and cleaner for better fuel economy and longer engine life.
The quietest lawn mowing experience possible.
See how easy engine starting can be. No prime, no choke–just pull for power.
Look Before you pump fuel into your lawn mower and help avoid engine damage. Do not use any fuel containing greater than 10 percent ethanol (E10) in the engine on your outdoor power equipment.
Cubic centimeters (cc) only measure the size of the engine on your lawn mower or outdoor power equipment. Torque measures the power that rotates the blade. Maximize your mowing power.
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*All power levels are stated gross horsepower at 3600 rpm per SAE J1940 as rated by Briggs & Stratton.
*All power levels are stated gross torque at 2600 rpm per SAE J1940 as rated by Briggs & Stratton.