When it comes to high-performance chainsaws, STIHL has long held a place at the top of the market. Two of its most advanced models—the STIHL MS 500i and the STIHL MS 400 C—have become favorites among professional loggers and demanding users. Each chainsaw offers outstanding features, cutting-edge technology, and exceptional reliability. But how do they stack up against each other? This article takes a closer look at both models to help you understand their strengths, differences, and ideal use cases.
Engine Technology: Fuel Injection vs. Magnesium Power
The STIHL MS 500i is notable for being the world’s first chainsaw with electronically controlled fuel injection. This innovation allows for rapid acceleration, optimal fuel efficiency, and consistent engine performance, even under variable environmental conditions. Whether you’re cutting in high altitudes or cold temperatures, the MS 500i adjusts in real time, ensuring powerful, smooth operation.
On the other hand, the STIHL MS 400 C introduces a different kind of innovation—it’s the first chainsaw to feature a magnesium piston. This lightweight component significantly reduces the saw’s overall weight while maintaining excellent durability and high torque. It doesn’t have fuel injection, but the traditional 2-MIX engine design still delivers excellent performance and fuel economy for most cutting applications.
Power Output and Performance
In terms of raw power, the MS 500i takes the lead. With a 79.2cc engine producing 6.7 horsepower, this saw is built for heavy-duty work like felling large trees, cutting thick logs, and operating for extended periods. It excels in demanding environments and is a favorite for forestry professionals.
The MS 400 C is slightly less powerful, with a 66.8cc engine that produces 5.4 horsepower. While that might seem like a big difference, the MS 400 C still delivers more than enough cutting power for medium to large-scale tasks. It’s also incredibly responsive, thanks to its lightweight piston and optimized balance.
Weight and Handling
One of the biggest advantages of both models is their power-to-weight ratio. The MS 500i weighs just 13.9 lbs (6.3 kg) without fuel and cutting equipment. For such a powerful saw, this is impressively light. The smart design reduces operator fatigue and makes long workdays more manageable.
The MS 400 C is even lighter at 12.8 lbs (5.8 kg), making it ideal for users who prioritize comfort and mobility. Whether you’re climbing trees or working on the ground, the MS 400 C offers excellent maneuverability without sacrificing cutting strength.
Starting Systems and Ease of Use
STIHL’s engineering shines when it comes to user convenience. The MS 500i features fuel injection, which eliminates the need for a traditional choke and greatly simplifies cold starts. Just a couple of pulls, and the engine roars to life. It’s also more reliable in extreme temperatures, making it a great choice for year-round use.
The MS 400 C comes equipped with STIHL’s ElastoStart and decompression valve, which work together to reduce the effort required to start the engine. While it doesn’t start quite as quickly as the MS 500i, it still offers a smooth and reliable experience that most users find satisfactory.
Vibration Control and Ergonomics
Both models include advanced anti-vibration systems, which are crucial for reducing fatigue and preventing long-term injury during extended use. The MS 500i and MS 400 C both score high marks in comfort and control, making them suitable for professionals who need to use them for hours at a time.
The handles on both chainsaws are well-padded and ergonomically designed to fit comfortably in the hand. The overall build quality, as expected from STIHL, is top-tier.
Cutting Attachments and Bar Length Options
The MS 500i supports guide bars from 16 inches up to 36 inches, making it incredibly versatile for various cutting tasks. Whether you’re limbing or felling giant trees, this saw can be configured to suit your needs.
The MS 400 C is slightly more limited, typically supporting 16 to 25-inch bars. However, this still covers most common applications, especially in landscaping, arborist work, and moderate forestry tasks.
Fuel Efficiency and Maintenance
Despite the increased power, the MS 500i’s fuel injection system helps manage fuel consumption efficiently. It delivers maximum output with optimal fuel use, which can result in fewer refueling breaks and lower operating costs over time.
The MS 400 C, while more traditional in design, is also fuel-efficient thanks to STIHL’s 2-MIX engine technology. It separates the exhaust gases from the unburned fuel mixture, which reduces emissions and improves efficiency.
Both models feature tool-free fuel and oil caps, side-access chain tensioners, and accessible air filters, making regular maintenance straightforward and fast.
Price and Value
With its cutting-edge technology and superior performance, the MS 500i is priced at the premium end of the market. It’s an investment—but for those who rely on their saws professionally, it’s often worth every penny.
The MS 400 C comes at a more moderate price point, making it a great value for those who need high performance without the added expense of fuel injection technology. For many users, especially arborists and experienced DIYers, the MS 400 C hits the sweet spot of power, weight, and affordability.
Ideal Users
STIHL MS 500i is best suited for:
- Professional loggers
- Forestry workers
- Heavy-duty land clearing
- Users working in varying environmental conditions
STIHL MS 400 C is ideal for:
- Arborists
- Professional landscapers
- Firewood processors
- Advanced home users with high performance demands
Final Thoughts
Both the STIHL MS 500i and the STIHL MS 400 C are exceptional chainsaws, each bringing unique strengths to the table. The MS 500i is unmatched in power and cutting-edge fuel injection technology, while the MS 400 C impresses with its light weight, magnesium piston innovation, and affordability.
Choosing between them comes down to your specific needs. If you’re a professional looking for the best of the best, the MS 500i won’t disappoint. If you want a powerful, reliable chainsaw that offers excellent handling and efficiency without breaking the bank, the MS 400 C is a fantastic choice.
Either way, you’re getting STIHL’s renowned build quality, reliability, and support—ensuring your chainsaw performs at the highest level for years to come.
