STIHL MS 500i Review – The Fuel-Injected Powerhouse Transforming Professional Logging

Professional loggers and arborists are always looking for a tool that can keep up with their toughest days in the field. The STIHL MS 500i has been making waves throughout forestry circles thanks to its claim as the world’s first chainsaw with electronically controlled fuel injection. This groundbreaking feature promises not just raw power but improved efficiency and usability that changes expectations for high-performance saws.

Meet the STIHL MS 500i: Fuel Injection Meets Forestry

When STIHL introduced the MS 500i, it set a new standard for chainsaw engineering. At its core is the world’s first electronically controlled fuel injection (EFI) system for chainsaws. For decades, two-stroke chainsaw engines relied on carburetors to manage the delicate dance of air and fuel. The MS 500i ends that era, replacing it with precise, real-time adjustments that account for temperature, elevation, and even fuel quality.

The result? Immediate starts, flawless throttle response, and consistent top-tier performance regardless of weather or working altitude. Professionals who face shifting conditions from subzero mornings to wet, humid afternoons will especially appreciate what EFI brings to their workflow.

Key Features and Benefits of the STIHL MS 500i

Unmatched Power-to-Weight Ratio

A standout feature of the MS 500i is its industry-leading power-to-weight ratio. The 79.2 cc, 6.7-horsepower engine is matched to a remarkably light body (just 13.9 lbs dry weight without bar and chain). This allows users to wield serious power with less fatigue, even during extended use or complex felling operations.

Lightning-Fast Acceleration

Thanks to its EFI system, the MS 500i accelerates from idle to full speed in split seconds. Loggers report that this “instant-on” feel makes it easier to manage heavy-duty cuts, reducing the chances of a sluggish throttle or unnecessary stalling during critical moments.

Engineered for Ease of Use

Every aspect of the MS 500i is designed for professional efficiency:

• Side-access chain tensioner for quick adjustments
• Tool-free fuel and oil caps to speed up pit stops
• Anti-vibration system engineered to protect arms and hands over long days
• Advanced filtration extending engine life and reducing downtime

Fuel Efficiency and Reliability

With EFI, every drop of fuel is metered precisely. This leads to consistent output, fewer emissions, and reliability across changing altitudes or temperatures. Cold morning starts or sudden weather changes no longer mean frustrating downtime.

Technical Specifications at a Glance

These specs confirm what’s felt in the field: the MS 500i is designed for heavy-duty, all-day use, without weighing down the operator.

Real-World Applications for the MS 500i

The versatility of the MS 500i makes it a favorite for several professional applications, such as:

Logging and Felling

When large-diameter hardwoods need to come down quickly and safely, the MS 500i’s instant throttle and cutting force deliver. Its power-to-weight advantage eases the strain of repeated heavy cuts in dense forests.

Limbing and Bucking

The balanced build and anti-vibration system translate into smoother handling during limbing and bucking operations, where control and stamina are key.

Storm Clean-up and Urban Forestry

For arborists tackling post-storm damage or municipal tree work, consistent start-up and fuel efficiency matter. The MS 500i shines where reliability can’t be compromised.

Difficult Terrains

The chainsaw’s ability to adapt fuel delivery to altitude means it performs just as well in mountain logging as it does at sea level, without manual carburetor adjustments.

What Professionals Are Saying About the STIHL MS 500i

“The first time I fired up the MS 500i, I was shocked at how fast it revved. You barely touch the throttle and it’s powering through 36” oak.” 

– Eric J., Logging Contractor, Oregon

“We do a lot of tree removals in urban areas where reliability is non-negotiable. The 500i has never failed to start, even in rain or snow.” 

– Tasha B., Certified Arborist, New York

“The reduced weight is the real winner. After a week in the bush, my shoulders aren’t aching like they used to, but I’m still finishing the same workload.” 

– Dave M., Forestry Worker, Alberta

Across forums and professional review sites, the consensus is clear: the STIHL MS 500i delivers on its bold promises for speed, reliability, and operator comfort.

STIHL MS 500i vs Competing Chainsaws

Comparing with the Husqvarna 572 XP and Echo CS-7310P

• Power: The MS 500i’s 6.7 hp edges out most competing pro saws in this class.
• Weight: It’s significantly lighter than Husqvarna’s 572 XP (14.5 lbs) and Echo’s CS-7310P (14.8 lbs), making a difference over hours of work.
• Technology: The electronically controlled fuel injection sets the MS 500i apart. Competing saws still rely on carburetors and manual tuning, especially noticeable when working under temperature or altitude changes.
• Ergonomics: All three saws offer excellent anti-vibration features, but the MS 500i’s balance and acceleration give it a distinct edge for felling and quick transitions.

For professional users who value peak performance and minimal downtime, the MS 500i consistently leads its class.

Maintenance and Care Tips for Your STIHL MS 500i

To keep your investment running at its best:

• Clean the air filter regularly. The advanced filtration system prevents most dust, but build-up can still occur in heavy use.
• Check chain tension before every job. A side-access tensioner makes this an easy routine.
• Use high-quality fuel and two-stroke oil. The EFI system offers some forgiveness, but quality fuel maintains engine health.
• Inspect spark plug and exhaust port monthly. This ensures the unique fuel injection system operates at peak efficiency.
• Store properly in the off-season. Run the saw dry of fuel before long storage and keep it in a cool, dry place.

All users should consult the STIHL manual for in-depth care instructions and adhere to regular service intervals at authorized dealerships.

Why the STIHL MS 500i Changes the Game for Professionals

The STIHL MS 500i is more than a new product; it’s a leap forward for chainsaw technology. For professional loggers, arborists, and forestry workers, it delivers:

• Best-in-class power-to-weight ratio
• Unmatched acceleration with EFI
• Reliability under any conditions
• Real-world ergonomic improvements

With glowing reviews from field operators and superior technology, the MS 500i stands out as the ideal tool for those who demand the absolute best from their equipment.

It’s not just about cutting wood faster; it’s about working smarter, safer, and with less fatigue day after day.

Azeem

My name is Azeem. I am a passionate digital marketer, content writer and expert in search engine optimization. I have more than 3 years of experience to help businesses like yours to boost their online presence. I am a DIY lover and automotive tools enthusiast. I enjoy sharing simple, step by step guides on car maintenance, electric tools, and repair tips to help you get the job done yourself and save money along the way.