Gravely ZT HD 52 23 HP 52-Inch Commercial-Grade Zero-Turn Mower with Kawasaki FR691V V-Twin and ZT-3100 Transmission

The ZT HD 52 is the heavy-duty residential flagship of Gravely's prosumer zero-turn lineup — a 52-inch lap-bar zero-turn paired with a Kawasaki FR691V V-twin and twin Hydro-Gear ZT-3100 commercial-grade transaxles. The HD designation matters: every component is one tier heavier than the standard ZT line, from the X-Factor commercial fabricated deck to the welded tubular steel frame to the commercial-grade transmissions. Backed by Gravely's 100-plus years of mowing-equipment engineering, the ZT HD line is built for owners running two- to five-acre properties weekly or running a small commercial route.

Power comes from a Kawasaki FR691V V-twin OHV engine displacing 726cc. The FR series is the residential-grade extension of Kawasaki's commercial FX engine line, sharing the same overhead valve architecture, full pressure lubrication, and dual-element premium air filtration. Owners running the ZT HD 52 on a typical weekly schedule will see oil and filter changes once a season — essentially the entire engine maintenance routine. Electric key start, automatic choke, and a regulated charging system handle cold mornings without operator intervention.

Twin Hydro-Gear ZT-3100 commercial-grade transaxles power the rear wheels independently, allowing true zero-radius pivoting controlled through a pair of lap bars. Top forward speed is 8 mph and reverse runs at 4 mph. The ZT-3100 is the same commercial-tier transmission Gravely uses on its professional landscaper machines — significantly larger oil capacity, reinforced internals, and a service life calibrated for several seasons of daily commercial use.

The 52-inch X-Factor commercial fabricated steel deck is welded from heavier-gauge plate than the residential ZT X line, with reinforced spindle mounts and an airflow geometry borrowed from Gravely's commercial Pro-Turn series. Three cutting blades work in side-discharge configuration; cutting heights adjust across 13 positions between 1.5 and 4.5 inches via a foot-lift pedal and pin-locked indicator.

Operator comfort centers on a premium high-back seat with armrests, soft-grip lap bars, and a vibration-dampening foot deck. The dashboard layout is honest and minimal: ignition, throttle, choke, PTO knob, hour meter. The frame is welded tubular steel with reinforcement plates at high-stress points and a flat-bar reinforcement structure underneath the operator station.

The 5-gallon fuel tank delivers four-plus hours of continuous mowing time. The standard rear hitch accepts most popular tow-behind attachments — dump carts, broadcast spreaders, plug aerators, dethatchers, and lawn rollers all mount without modification. Hour meter and cup holder are factory standard.

For two- to five-acre properties or small commercial routes where heavy-duty construction matters as much as cut quality, the ZT HD 52 is the most pragmatic prosumer zero-turn in Gravely's catalog. The X-Factor commercial deck and ZT-3100 transmission together deliver the construction quality of a $10,000 commercial machine at a residential price point.