Yardbeast 4521 4.5″ Commercial Wood Chipper with Kohler Command Pro CH640 20.5HP Gas Engine

Yardbeast 4521 4.5″ Commercial Wood Chipper with Kohler Command Pro CH640 20.5HP Gas Engine

The Yardbeast 4521 4.5″ Commercial Wood Chipper brings professional-grade performance to large property owners, tree care companies, landscapers, and contractors needing a reliable machine to process tough branches and debris. Powered by a robust Kohler Command Pro CH640 V-Twin 20.5HP gasoline engine, this chipper delivers the torque and consistency required for continuous operation in demanding environments. Featuring a gravity self-feeding design, it efficiently accepts branches up to 4.5 inches in diameter without the need for manual push-through, improving productivity and reducing operator fatigue.

Built on a heavy-gauge all-steel frame with a dynamically balanced dual-blade reversible rotor, the Yardbeast 4521 is engineered for smooth cutting and lasting performance. The split frame design allows quick blade inspection and easy debris removal, minimizing downtime for maintenance and maximizing uptime on the job.

Designed with mobility and versatility in mind, this model includes a highway-towable system complete with DOT-compliant suspension, certified lighting, safety chains, and a 2-inch ball coupler, enabling safe transport between job sites. Its premium fuel system and heavy-duty clutch deliver reliable power transfer and long run times — ideal for commercial crews and serious property owners alike.

Whether clearing storm debris, maintaining trails and fence lines, or processing wood for mulch and compost, the Yardbeast 4521 combines rugged construction with advanced features to make heavy-duty chipping tasks faster and more efficient.

Note: Made-to-Order Item
Estimated lead time: Approximately 4 weeks
This item is manufactured after an order is placed and will ship once production is complete.

Features

• Relentless Commercial Power
  • Powered by a 20.5HP Kohler Command Pro CH640 V-Twin engine, manufactured in the USA and engineered for demanding commercial environments
  • Integrated oil coolers regulate operating temperatures and help extend oil-change intervals across the full power band
  • Heavy-duty, high-efficiency air filtration system protects the engine from dust and debris, allowing longer service intervals
  • Extra-large sleeve bearings are designed to support sustained heavy loads common in professional tree service and industrial applications
• Dual Blade Rotor with Split Frame Design
  • Dynamically balanced dual-blade reversible rotor delivers smooth, aggressive cutting performance
  • Angled A8 American-made tool steel blades create a strong self-feeding effect, improving productivity even in gravity-feed operation
  • Split frame construction allows fast blade inspection, simplified maintenance, and quick debris clearance, reducing downtime in the field
• Efficient, Certified Fuel System
  • Large 5.0-gallon fuel tank supports extended run times between refueling
  • Constructed from HDPE with Level 3 fluorination, offering superior resistance to fuel permeation and degradation
  • Fully EPA and CARB compliant, meeting commercial emissions requirements without sacrificing performance
• Robust Commercial Transmission
  • Wisconsin-built dual-belt centrifugal clutch efficiently transfers engine power to the rotor
  • Thick steel clutch bell and high-friction pads manage thermal loads during continuous operation
  • Dual-bearing supported tension idler arm maintains proper belt tension, minimizing power loss while extending belt and bearing life
• On-Road and Off-Road Towability
  • Designed for both jobsite mobility and highway travel, making it ideal for contractors servicing multiple locations
  • DOT-compliant suspension system delivers a stable ride across uneven terrain and paved roads
  • Equipped with certified lighting, safety chains, and a 2-inch ball coupler to meet legal highway towing standards
  • Built to transition seamlessly from forest trails to public roads without compromising safety or durability

Specifications

Product Video

Warranty

Yardbeast Limited Warranty

The Yardbeast 4521 includes a 2-year limited warranty covering defects in materials and workmanship under normal residential use and proper maintenance within the continental United States. As an authorized Yardbeast dealer, we serve as your first point of contact for warranty guidance, claim coordination, and documentation support, and we work directly with Yardbeast to assist with eligible warranty claims in accordance with their official terms.

View and Download

• Yardbeast 4521 Product Brochure
• Yardbeast 4521 Product Manual