Cub Cadet® Ultima Series ZT1 42-Inch Zero-Turn Lawn Mower

21.5 HP Kawasaki Engine, Fabricated AeroForce™ Deck & Dual Hydrostatic Transmissions

The Cub Cadet® Ultima Series ZT1 42 is a 42-inch zero-turn lawn mower designed to deliver a clean, even finish with efficient maneuverability and dependable performance. Powered by a 21.5 HP / 726cc Kawasaki FR651V twin-cylinder OHV engine, this mower provides the power needed to tackle residential lawn maintenance.

Dual hydrostatic transmissions provide quick, effortless ground speeds of up to 7 MPH forward and 3.5 MPH in reverse, while the fabricated 42-inch AeroForce™ deck is designed to produce finer clippings, fewer clumps and stragglers, and an even overall cut.

Its continuous tubular steel frame features a multi-step corrosion-defense system designed to help protect the mower against wear and environmental exposure.

Key Features

21.5 HP Kawasaki FR651V Engine

The mower is powered by a 21.5 HP / 726cc Kawasaki FR651V twin-cylinder OHV engine, delivering high-performance power for demanding residential mowing applications.

• Kawasaki FR651V engine
• 21.5 HP*
• 726cc displacement
• Twin-cylinder configuration
• OHV design

Dual Hydrostatic Transmissions

Dual hydrostatic transmissions provide responsive zero-turn maneuverability and quick ground speeds.

• Up to 7 MPH forward
• Up to 3.5 MPH reverse
• Smooth, effortless speed control
• Designed for efficient lawn coverage
• Zero-turn maneuverability

42-Inch AeroForce™ Fabricated Deck

The 42-inch AeroForce™ fabricated deck is designed to deliver Cub Cadet’s signature cut with improved clipping distribution.

The deck is engineered to provide:

• Fewer clumps and stragglers
• Finer clippings
• Improved cutting consistency
• Increased evenness
• Professional-quality lawn appearance

Heavy-Duty Tubular Steel Frame

A continuous 2-inch × 2-inch tubular steel frame provides a strong structural foundation for the mower.

The lower frame features a fully e-coated finish as part of the mower’s corrosion-defense system.

Triple Guard Corrosion Defense

The frame uses a multi-step corrosion protection process designed to help defend against wear and environmental exposure.

The system includes a fully e-coated lower frame and automotive-grade corrosion resistance applied electronically as part of the manufacturing process.

Cutting System

Engine & Performance

Frame & Durability

Zero-Turn Maneuverability

The Ultima Series ZT1 uses dual hydrostatic transmissions to provide responsive control and efficient maneuvering around landscaping, lawn edges, trees, garden beds, and other obstacles.

The zero-turn configuration allows the mower to make tight turns and quickly change direction while maintaining efficient forward mowing speeds.

Professional-Quality Cutting

The 42-inch fabricated AeroForce™ deck is designed to produce an even finish while improving clipping quality.

Its cutting design is intended to deliver:

• Finer clippings
• Fewer clumps
• Fewer stragglers
• More even cutting
• A cleaner-looking lawn

Product Specifications

Why Choose the Cub Cadet Ultima Series ZT1 42?

• 42-inch fabricated AeroForce™ deck for a clean, even cut.
• 21.5 HP Kawasaki FR651V engine provides high-performance power.
• 726cc twin-cylinder OHV engine delivers strong mowing performance.
• Dual hydrostatic transmissions provide smooth zero-turn control.
• 7 MPH forward speed helps cover lawn areas efficiently.
• 3.5 MPH reverse speed provides responsive maneuverability.
• 2 × 2-inch tubular steel frame provides a strong structural foundation.
• Triple Guard corrosion defense helps protect the frame against wear and corrosion.
• Finer clippings and fewer clumps support a cleaner-looking finished lawn.
• Zero-turn design makes maneuvering around lawn obstacles easier.

Power Rating Note

The supplied specifications identify the engine as 21.5 HP / 726cc. The horsepower figure is presented with an asterisk in the source material; the manufacturer’s applicable engine-rating conditions should be consulted for the precise rated-power methodology.