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

Specification	Details
Cutting Deck	42 in.
Deck Type	AeroForce™ Fabricated
Deck Construction	Fabricated
Cutting Performance	Fewer clumps and stragglers
Clipping Quality	Finer clippings
Cut Consistency	Increased evenness
Intended Result	Professional-quality finish

Engine & Performance

Specification	Details
Engine Brand	Kawasaki
Engine Model	FR651V
Engine Type	Twin-Cylinder OHV
Displacement	726cc
Rated Power	21.5 HP*
Transmission	Dual Hydrostatic
Forward Speed	Up to 7 MPH
Reverse Speed	Up to 3.5 MPH
Mower Type	Zero-Turn

Frame & Durability

Specification	Details
Frame Material	Tubular Steel
Frame Design	Continuous Square Frame
Frame Size	2 in. × 2 in.
Lower Frame	Fully E-Coated
Corrosion Protection	Triple Guard Corrosion Defense
Coating Process	Multi-Step Electronic Application
Protection	Designed to resist wear and corrosion

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

Specification	Details
Brand	Cub Cadet®
Series	Ultima Series
Model	ZT1 42
Product Type	Zero-Turn Lawn Mower
Deck Width	42 in.
Deck Type	AeroForce™ Fabricated
Engine	Kawasaki FR651V
Engine Power	21.5 HP*
Engine Displacement	726cc
Engine Configuration	Twin-Cylinder OHV
Transmission	Dual Hydrostatic
Forward Speed	7 MPH
Reverse Speed	3.5 MPH
Frame	Continuous Tubular Steel
Frame Size	2 in. × 2 in.
Corrosion Protection	Triple Guard / Fully E-Coated Lower Frame

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.

• We currently ship within the United States only.
• Enjoy free standard shipping on all orders.
• Orders are processed within 1–2 business days.
• Estimated Total Delivery Time is 4–7 business days.
• Tracking information will be sent to your email within 24 hours after your order has been dispatched.
• For more information about our shipping process, please view our full Shipping Policy.

• Not the right fit? Return or exchange within 30 days.
• Items must be unused and in original condition.
• Damaged products are eligible for a refund or replacement.Your line works well.
• For more information about our return & refund process, please view our full Return & Refund Policy.