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Zero-turn-radius riding mowers are the workhorses of the turf-maintenance field, giving professionals the power, speed and dexterity they need to care for acres of grassy green. Most models rely on a basic design: front-end rotary blades with the operator seated over the machine?EUR??,,????'?????<????????????EUR??,,??s center of gravity.
That?EUR??,,????'?????<????????????EUR??,,??s where the similarity ends, however. Because turf specialists rely on this class of mower, literally dozens of variations on the basic layout have sprung up. The profusion of models and permutations is dizzying, with most models offering multiple engine options and accessory choices.
Increased horsepower is one trend that has transformed the zero-turn riding mower in recent years. A decade or so ago, many riding mowers were manufactured with engines in the 12-h.p. range; now the norm (for basic models) is at least 20-h.p. The upper-end of the market is heading into uncharted territory, with many models exceeding 30 h.p. and a few touching 50 h.p.
This ?EUR??,,????'?????<????????bigger-must-be-better?EUR??,,????'?????<???????? philosophy strikes some industry watchers as unnecessary, especially as the price of gasoline heads into uncharted territory too.
?EUR??,,????'?????<????????If you want to make tall grass short you can get (a medium-horsepower model) and still get the job done,?EUR??,,????'?????<???????? George Thompson of engine maker Briggs & Stratton told the Christian Science Monitor earlier this year. ?EUR??,,????'?????<????????A Kia will get you there, as will a Maserati,?EUR??,,????'?????<???????? he said, using a car-brand comparison. ?EUR??,,????'?????<????????Obviously the Maserati has a lot more features on it. And a lot more horsepower.?EUR??,,????'?????<????????
Power can be a good thing when you?EUR??,,????'?????<????????????EUR??,,??re faced with expanses of warm-season turf like St. Augustine or bermudagrass. Theoretically, at least, a groundskeeper could reduce mowing frequency if he could slice through turf with more powerful equipment. Taking that approach too far would result in scalping and unsightly results, however.
Recent years have seen a rise in the adaptation of small diesel motors for many pieces of equipment. Diesel can offer better gas mileage and greater durability than gasoline engines.
Another thing to note about the range of equipment out there is the remarkable diversity of power plants available for almost every model. Recent years have seen a rise in the adaptation of small diesel motors for many pieces of equipment. Diesel can offer better gas mileage and greater durability than gasoline engines?EUR??,,????'?????<???????????although the price of diesel tends to fluctuate relative to traditional gas.
Another factor that governs (and will continue to affect) mower development are emissions requirements. California leads the nation in strict requirements, with even tighter rules coming on line several years from now. Most American manufacturers plan to keep pace with California Air Resources Board (CARB) standards.
It?EUR??,,????'?????<????????????EUR??,,??s possible that future legislation could create incentives for grounds maintenance to use zero-emissions electric equipment, although the battery technology for riding-class mowers is limited. Alternately, the technology for converting diesel engines to use so-called biodiesel fuel is evolving, and so is a low-emission, low-cost alternative.
?EUR??,,????'?????<????????If you want to make tall grass short you can get (a medium-horsepower model) and still get the job done.?EUR??,,????'?????<?????????EUR??,,????'?????<???????????George Thompson of engine maker Briggs & Stratton
In the end, selecting the right zero-turn riding mower is a complex enterprise because of the many choices involved. Landscape professionals should carefully evaluate what they expect their equipment to do in order to balance cost, fuel economy, horsepower and other factors. The mowers on these pages represent a limited sample of the many zero-turn-radius riding mowers currently on the market. The models seen here were selected based on notable features and photo availability.
Manufacturers are invited to submit news and information to product editor Larry Shield at lshield@landscapeonline.com
Francisco Uviña, University of New Mexico
Hardscape Oasis in Litchfield Park
Ash Nochian, Ph.D. Landscape Architect
November 12th, 2025
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