Stihl MS 500i Guide 2026:
Fuel-Injected Power
Ask a professional logger or arborist about the saw that changed the game, and the Stihl MS 500i comes up fast. It’s the world’s first chainsaw with electronically controlled fuel injection — and it isn’t a gimmick. The result is brutal acceleration, an elite power-to-weight ratio, and a starting routine so simple it almost feels too easy.
At Outdoor Equipment Co, we’re a Stihl dealer and we set up every saw before it leaves the shop. This guide explains what makes the MS 500i different, who it’s built for, and whether it’s the right saw for your work.
Michigan Note: From storm cleanup along the lakeshore to firewood season up north, Michigan demands a saw that starts in the cold and pulls hard through hardwood. The MS 500i’s fuel injection self-adjusts to temperature and altitude, so it runs consistently whether it’s a frosty morning or a humid August afternoon.
What Is Fuel Injection on a Chainsaw?
Traditional chainsaws use a carburetor, which mixes air and fuel mechanically and often needs tuning as conditions change. The MS 500i replaces that with electronic fuel injection (EFI):
- Sensors read air pressure, outside temperature, and engine temperature at startup and during use.
- The system self-adjusts the fuel mix in real time for optimum power in any conditions.
- No choke, no carb tuning — you press the primer bulb and pull the cord.
The payoff is rapid, smooth throttle response, easy cold starts, and consistent performance from sea level to high altitude without fiddling.
Stihl MS 500i Specs at a Glance
| Spec | MS 500i | Why It Matters |
|---|---|---|
| Engine | 79.2cc PRO GRADE | Serious cutting power |
| Power Output | ~6.7 bhp | Fast through hardwood |
| Powerhead Weight | ~13.9 lbs | Elite power-to-weight |
| Guide Bar Range | 16″–36″ | Versatile for big timber |
| Fuel System | Electronic injection | No choke, easy starts |
Why Pros Choose the MS 500i
Stihl MS 500i — Built for Demanding Cutting
The MS 500i is designed and built for forestry crews and tree-service professionals who cut all day. The combination of a 79.2cc engine and a featherweight 13.9-lb powerhead gives it one of the best power-to-weight ratios in its class, so it carves through felling, bucking, and limbing with less operator fatigue. Reviewers consistently praise its instant, smooth power and the lack of any “fluffy” running or wandering idle. If your livelihood depends on a saw, this is the benchmark.
MS 500i vs. a Standard Carbureted Pro Saw
If you already run a carbureted professional saw, the most noticeable change with the MS 500i is what you don’t do. There’s no choke lever to set, no long warm-up, and no re-tuning the carburetor when the weather turns cold or you head north to higher ground. The engine’s sensors handle that automatically, so the saw pulls the same on a 20-degree January morning as it does in August heat. That consistency is a real productivity gain for anyone who moves between jobsites and seasons.
The trade-offs are honest ones. The MS 500i costs more up front than a comparable carbureted saw, and because it’s a high-output 79.2cc powerhead, it rewards good chain discipline — a sharp, correctly tensioned chain and clean bar rails let the engine do what it’s built to do. It’s still a mix-fuel two-stroke, so you’ll run a quality 50:1 blend rather than straight pump gas. For a crew cutting day in and day out, faster starts and less downtime typically pay back the premium within a season or two.
One more sizing note: the MS 500i supports guide bars from 16 to 36 inches, but the sweet spot for most storm cleanup and firewood work sits in the 20-to-25-inch range. A shorter bar is lighter, faster in the cut, and easier to control for bucking, while the long bars are best saved for genuine large-diameter felling. Running more bar than you need just adds weight and drag. Tell us the wood you cut most often and we’ll spec the bar, chain, and pitch to match the way you actually work.
Frequently Asked Questions
What makes the Stihl MS 500i special?
The MS 500i is the world’s first chainsaw with electronically controlled fuel injection. Sensors measure air pressure, temperature, and engine conditions and self-adjust for optimum power, so the saw delivers rapid, smooth acceleration and an exceptional power-to-weight ratio. There’s no choke and no carburetor to tune — you simply prime and pull.
What are the Stihl MS 500i specs?
The MS 500i has a 79.2cc engine producing about 6.7 bhp, with a powerhead weight of roughly 13.9 lbs. It accepts guide bars from 16 to 36 inches, making it a versatile professional saw for felling, bucking, and limbing larger timber.
Where can I buy a Stihl MS 500i in Michigan?
Outdoor Equipment Co is a Stihl dealer carrying the MS 500i along with guide bars, chains, and full chainsaw service throughout Michigan. We set up and tune every saw before it leaves the shop.
Should I buy a STIHL MS 500i online or from a local dealer?
Buying from a local dealer like Outdoor Equipment Co means your STIHL MS 500i arrives assembled, adjusted, and test-run — not in a crate. You also get warranty registration handled for you, honest sizing advice before you spend anything, and factory-trained service down the road. Online and big-box purchases typically leave setup and warranty legwork to you.
Does Outdoor Equipment Co offer financing?
Yes. Outdoor Equipment Co offers financing options on new equipment — see the financing page at outdoorequipco.com/financing or call (866) 688-7847 and our team will walk you through current offers. You can also ask about trade-in options when you visit any of our three Michigan locations.
Related Guides & Resources
SHOP THE STIHL MS 500i IN MICHIGAN
We set up, tune, and test every Stihl saw before it leaves the shop. Get yours ready to cut.
Browse Stihl ChainsawsIs the MS 500i Right for You?
Best For: Professionals & Heavy Users
If you fell trees, cut firewood by the cord, or do storm cleanup regularly, the MS 500i’s power, speed, and reduced fatigue earn their keep. It’s a tool that pays for itself in productivity.
Maybe Overkill For: Occasional Homeowners
If you only trim a few branches or cut the occasional small log each year, a smaller, less expensive Stihl saw will serve you well. The MS 500i is a professional-class machine — and priced like one.
Consider the Investment
The MS 500i typically runs in the higher end of the chainsaw market. For pros, the productivity and durability justify it; for light users, a mid-range saw is the smarter buy. We’re happy to help you right-size your choice.
MS 500i Care & Safety Tips
- Use fresh, properly mixed fuel — EFI is forgiving, but clean fuel still protects the engine.
- Keep the chain sharp and properly tensioned for safe, efficient cutting.
- Clean the air filter regularly to maintain peak performance.
- Always wear chaps, a helmet, eye and ear protection, and cut-resistant gloves.
- Have it serviced annually so it’s ready when storm season hits.
