Kubota or B&S: Which Mini Excavator Engine to Choose?

When you're looking at mini excavators, the choice often comes down to two popular engines: Kubota and Briggs & Stratton. This choice matters because it affects how well your machine works, what it costs to run, and how long it lasts. Let's look at what makes each engine different so you can pick the right one for your work.


1. Understanding Your Engine Options

The fundamental differences between Kubota and Briggs & Stratton engines stem from their distinct design approaches to power delivery and operational efficiency. Each design serves specific operational needs in mini excavators, affecting everything from daily performance to maintenance requirements.

The Kubota Engine Mini Excavator Edge

A Kubota mini excavator brings serious muscle to construction sites. The D722-E3B delivers 14.9 kW (20.0 HP), making it a heavy duty choice for demanding jobs. Here's what makes it stand out:

  • Excellent performance in tight spaces
  • Low noise and vibration levels
  • Reliable hydraulic hose system support
  • Built to minimize downtime on busy sites

The Briggs and Stratton Mini Excavator Advantage

With power options up to 13.5 HP, a Briggs and Stratton engine mini excavator offers versatility for different jobs. It's particularly good for:

  • Construction in narrow lanes and alleys
  • Work in backyards and gardens
  • Projects needing a light yet powerful mini excavator
  • Sites where easy maintenance matters

Key Specifications at a Glance


Feature

Kubota D722-E3B

B&S XR Series

Power Output

20 HP continuous

Up to 13.5 HP range

Fuel Type

Diesel

Gasoline

Cooling System

Liquid-cooled

Air-cooled

Cylinder Configuration

3-cylinder

Single-cylinder

Emissions Compliance

EPA Tier 4

Standard gasoline regulations


2. Performance in Real Working Conditions

Compact Excavator w 2698 lbf Force,mini digger small excavator with Kubota Efficient Engine

In real-world applications, the differences between these engines become particularly evident. The Kubota D722-E3B's liquid-cooled system provides exceptional temperature stability, even in challenging environments. This translates into consistent performance during extended operation periods, making it ideal for applications where downtime isn't an option.

The Briggs & Stratton XR Series, available in power outputs ranging from 3.5 to 13.5 HP, offers remarkable versatility. Its air-cooled design, while requiring more frequent maintenance intervals, provides excellent accessibility for routine service tasks. This accessibility becomes particularly valuable in operations where quick maintenance turnaround is essential.


Operating Condition

Kubota Engine Mini Excavator

Briggs & Stratton Mini Excavator

Extended Operation

Maintains consistent power output

Best for intermittent use patterns

Temperature Management

Superior stability in harsh conditions

Efficient in moderate conditions

Power Delivery

Steady torque for demanding tasks

Responsive power for varied tasks

Fuel Efficiency

Optimized for continuous operation

Efficient for shorter work cycles


3. Understanding Total Cost of Ownership

The financial implications of engine choice extend far beyond the initial purchase price. A comprehensive view of ownership costs reveals interesting patterns:


Cost Factor

Kubota D722-E3B

B&S XR Series

Initial Investment

Higher

Lower

Fuel Efficiency

Superior in continuous operation

Good for intermittent use

Maintenance Intervals

Longer between services

More frequent but simpler

Parts Availability

Specialized dealer network

Widely available

Service Complexity

Requires skilled technicians

More straightforward repairs


4. Environmental Considerations and Future Adaptability

Today's job sites often have strict rules about engine emissions, and these rules keep getting tougher. The Kubota D722-E3B already meets the EPA's strictest standards (Tier 4), which means you can use it on any job site. This matters especially for government contracts or projects with specific environmental requirements.

Briggs & Stratton keeps up differently. They've made their gas engines cleaner and more efficient with better fuel burning and filtering systems. While they follow different rules than diesel engines, they still run clean enough for most work sites.


5. Making an Informed Decision

To pick the right engine, start by looking at your everyday work needs. Ask yourself:

  • What kind of jobs will you handle most often?
  • Who will maintain your machine?
  • What fuel is easier for you to get and use?

The Kubota D722-E3B really shines when you need non-stop power and reliable performance. It's built tough for serious industrial work, like major construction projects. Just keep in mind you'll need trained mechanics for servicing - it's not a do-it-yourself kind of engine.

The Briggs & Stratton XR Series takes a different approach. It's easier to work on, and most mechanics already know these engines well. Plus, you can find parts almost anywhere. This makes it perfect if you want something that's simple to maintain and can handle different types of jobs throughout the day.


Conclusion: Aligning Engine Choice with Operational Needs

These two engines shine in different types of work. If you're doing heavy-duty jobs like deep excavation or working long hours, Kubota's D722-E3B is your best bet. Professional contractors pick it because it keeps going strong even in tough conditions.

On the other hand, if you need a machine that's easy to maintain and can handle different kinds of jobs, look at the Briggs & Stratton XR Series. It's great for landscaping projects and lighter work where you need to switch between tasks throughout the day.

Your choice between a Kubota engine mini excavator and a Briggs and Stratton mini excavator ultimately depends on three critical factors:

  1. The nature and duration of your typical projects
  2. Your existing maintenance infrastructure and expertise
  3. The total cost of ownership, including fuel, maintenance, and operational efficiency

When these factors align with your operational requirements, you'll find either engine can deliver exceptional value. The key lies not in choosing the most powerful or least expensive option, but in selecting the engine that best matches your specific operational profile and long-term business goals.

David Johnson
I'm David Johnson, an engineer with experience in mechanical engineering. I specialize in construction machinery and have worked with heavy machinery like mini excavators for a long time. My aim is to simplify difficult technical ideas so that everyone can grasp them. Whether you work in construction or just want to learn more, I'm here to help make things clear.
Back to blog