Cub Cadet Ultima ZT1 42-Inch Zero-Turn Lawn Mower with 21.5 HP Kawasaki Engine

High-Performance Zero-Turn Mowing with Dual Hydrostatic Transmissions

The Cub Cadet® Ultima Series ZT1 42 Zero-Turn Lawn Mower combines a powerful 21.5 HP / 726cc Kawasaki FR Series twin-cylinder OHV engine with dual hydrostatic transmissions and a 42-inch steel cutting deck. Designed for efficient residential mowing, the ZT1 42 delivers quick ground speeds and zero-turn maneuverability to help produce a clean, even finish.

Its heavy-duty 2-inch × 2-inch tubular steel frame features a fully e-coated lower frame and Triple Guard™ corrosion defense system. The 42-inch steel cutting deck uses smooth-arc dual blades, optimized blade overlap, and a deep-dome design to provide broad cutting coverage and a consistent finished appearance.

Key Features

Kawasaki Twin-Cylinder Engine

The Kawasaki FR Series engine delivers high-performance power for tackling demanding residential lawn conditions.

• 21.5 HP*


• 726cc displacement


• Kawasaki FR Series engine


• Twin-cylinder configuration


• OHV design


• Designed for high-performance mowing

*Horsepower is stated according to the supplied manufacturer specifications.

Dual Hydrostatic Transmissions

Dual hydrostatic transmissions provide smooth, responsive control and allow the mower to reach quick ground speeds without traditional gear shifting.

• Dual hydrostatic transmissions


• 7 MPH forward speed


• 3.5 MPH reverse speed


• Smooth ground-speed control


• Designed for quick and effortless operation

42-Inch Steel Cutting Deck

The 42-inch steel cutting deck provides a wide cutting path while incorporating a deep-dome design and dual-blade system for a clean, consistent cut.

• 42-inch cutting width


• Steel construction


• Dual smooth-arc blades


• Optimized blade overlap


• Deep-dome deck design


• Rust-resistant construction


• Broad cutting coverage to help reduce mowing time

Heavy-Duty Tubular Steel Frame

The continuous tubular steel frame is designed for durability and enhanced protection against wear and corrosion.

• 2-inch × 2-inch tubular steel frame


• Fully e-coated lower frame


• Triple Guard™ corrosion defense system


• Multi-step electronic coating process


• Automotive-grade corrosion resistance


• Designed to protect against wear and tear

Engine Specifications

Specification	Details
Engine Brand	Kawasaki
Engine Series	FR Series
Engine Displacement	726cc
Horsepower	21.5 HP*
Cylinder Configuration	Twin-Cylinder
Valve Configuration	OHV
Engine Type	Gasoline

*Horsepower is based on the supplied product specifications.

Cutting Deck Specifications

Specification	Details
Cutting Width	42 Inches
Deck Material	Steel
Blade Configuration	Dual Blades
Blade Design	Smooth Arc
Deck Design	Deep Dome
Blade Overlap	Designed for Consistent Coverage
Rust Resistance	Yes
Cutting Purpose	Clean, Even Finish

Drive System & Performance

Specification	Details
Drive System	Dual Hydrostatic Transmissions
Forward Speed	7 MPH
Reverse Speed	3.5 MPH
Mower Type	Zero-Turn
Steering/Control	Zero-Turn Hydrostatic Control

Frame & Durability

Specification	Details
Frame Material	Tubular Steel
Frame Size	2" × 2"
Lower Frame	Fully E-Coated
Corrosion Protection	Triple Guard™ Corrosion Defense System
Coating Process	Multi-Step Electronic Application
Coating Grade	Automotive-Grade Corrosion Resistance

Mowing Performance

The ZT1 42 is designed to provide a professional-quality lawn appearance through its combination of zero-turn maneuverability, high ground speeds, and a wide dual-blade cutting deck.

The deep-dome deck design helps manage grass flow around the blades, while the smooth-arc blades and cutting overlap are designed to produce an even finish with fewer visible clumps.

Ideal Applications

The Cub Cadet Ultima ZT1 42 is designed for homeowners who want the speed and maneuverability of a zero-turn mower for residential lawn maintenance.

• Residential lawn mowing


• Medium-sized residential properties


• Lawns requiring frequent maneuvering around obstacles


• Applications where reduced mowing time is important


• Users seeking zero-turn control and high ground speeds


• Maintaining a clean, even lawn appearance

Operating & Maintenance Guidance

• Follow the manufacturer's operating and maintenance instructions.


• Inspect the cutting deck, blades, tires, and controls before operation.


• Keep the deck and discharge areas clear of accumulated grass and debris.


• Exercise additional caution when mowing slopes or uneven terrain.


• Keep children, pets, and bystanders away from the mower while operating.


• Wear appropriate footwear and follow recommended zero-turn mower safety practices.


• Perform routine engine, blade, deck, and transmission maintenance according to the manufacturer's recommendations.

Why Choose the Cub Cadet Ultima ZT1 42?

• 21.5 HP / 726cc Kawasaki FR Series twin-cylinder OHV engine


• 42-inch steel cutting deck


• Dual smooth-arc blades


• Deep-dome deck design


• Dual hydrostatic transmissions


• 7 MPH forward speed


• 3.5 MPH reverse speed


• 2" × 2" continuous tubular steel frame


• Fully e-coated lower frame


• Triple Guard™ corrosion defense system


• Rust-resistant cutting deck


• Zero-turn maneuverability


• Designed for a clean, even, professional-quality finish

• 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.