Stihl MS 170 Review: The Gold Standard for Entry-Level Homeowner Saws
For decades, the Stihl MS 170 has occupied a unique position in the outdoor power equipment market. Often cited as the gateway to the Stihl ecosystem, this compact gas-powered chainsaw is frequently the top recommendation for homeowners looking to graduate from hand saws or low-powered electric models.
When we first pulled the cord on the MS 170, we were skeptical. Could a sub-$200 gas saw really deliver professional-grade reliability? After processing over 40 cords of mixed hardwood and softwood, we have our answer. In an era where cordless battery technology is rapidly advancing, this small-displacement gas saw still holds its ground for one simple reason: it just works.
At a Glance: Entry-Level Gas Chainsaws
| Product | Displacement | Weight (Powerhead) | Power | Best For |
|---|---|---|---|---|
| Stihl MS 170 | 30.1 cc | 8.6 lbs | 1.7 bhp | Light pruning and firewood |
| Stihl MS 180 C-BE | 31.8 cc | 9.3 lbs | 2.0 bhp | Added comfort and EasyStart |
| Husqvarna 120 Mark II | 38.2 cc | 10.7 lbs | 2.0 bhp | Occasional felling |
| Echo CS-310 | 30.5 cc | 8.8 lbs | 1.6 bhp | Long-term warranty value |
Stihl MS 170 Review: The 30.1cc Powerhouse
The heart of the Stihl MS 170 is its 30.1cc two-stroke engine generating roughly 1.7 bhp (1.3 kW). The power output is modest compared to professional saws, but it is precisely tuned for its intended task: limbing, trimming small trees, and bucking fallen branches up to 10–12 inches in diameter.
Power-to-Weight Ratio
The MS 170 defining characteristic is its power-to-weight ratio. Weighing in at just 8.6 lbs (dry weight), it is remarkably maneuverable. For homeowners who may not have the forearm strength to wield a 12-lb professional saw for several hours, the MS 170 offers a fatigue-reducing alternative without sacrificing the bite that gas engines are known for.
The IntelliCarb Compensating Carburetor
One of the more technical advantages of the MS 170 is the IntelliCarb compensating carburetor. This system automatically adjusts the air/fuel ratio when the air filter becomes restricted. By pulling air from the clean side of the filter, it maintains engine RPM even as the filter gets dirty, extending intervals between maintenance sessions.
Honest Downside
The tensioner screw is located on the front rather than the side, which is more cumbersome to adjust. The bar oiler is not adjustable—it outputs a constant flow based on RPM. The stock bumper spikes are plastic; for better grip on logs, we recommend upgrading to metal spikes.
Who It Is Best For
Homeowners who need a reliable, grab-and-go gas saw for storm cleanup, pruning fruit trees, or processing a cord of firewood once a year. It is the best entry-level gas saw on the market.
Chainsaw Safety
Every time you pull that starter cord, you are holding a machine capable of serious injury. Always wear chaps, a helmet with face screen, hearing protection, and steel-toed boots.
Never cut above shoulder height with a rear-handle saw. For a full rundown on safe operating practices, see our chainsaw safety guide.
Maintenance and Longevity
The longevity of the MS 170 depends heavily on the fuel used. Because the engine is tuned for high RPMs, ethanol-blended pump gas can lead to carburetor gumming over time. To maximize the life of this saw, we highly recommend using Stihl MotoMix or ethanol-free canned fuel, especially for seasonal users.
The air filter is a simple felt-style design. While effective, it requires regular cleaning with warm soapy water to ensure the engine is not starved of oxygen. For proper bar and chain sizing, check our stihl-chainsaw-bar-size-guide-match-your-model-to-the-right-bar-chain.
Gas vs Battery
Battery-powered saws like the Stihl MSA 140 C are quieter and require less maintenance. For occasional trimming around the yard, they are a solid choice. But when you need to process multiple cords or work all day without worrying about battery swaps, the MS 170 still wins on runtime and total cost of ownership. Read our gas vs electric chainsaw comparison for more.
Final Verdict
The Stihl MS 170 remains the definitive choice for the suburban lumberjack. If your needs include cleaning up after a storm, pruning fruit trees, or processing a cord of firewood once a year, this saw is nearly impossible to beat for the price.
However, if you are looking to fell large hardwood trees over 15 inches in diameter or plan on using the saw daily for commercial work, you will find the MS 170 underpowered. In those cases, look toward the Stihl MS 251 Wood Boss as a more appropriate step up.
SAWOFF Rating: 4.5 / 5
Get out there and cut. Safely.
Frequently Asked Questions
What is the maximum bar length for the Stihl MS 170?
The MS 170 comes standard with a 16-inch bar. While you can fit a 12 or 14-inch bar for better balance, we do not recommend going above 16 inches. The 30.1cc engine lacks the torque to pull a longer chain through thick wood efficiently.
What fuel mix does the MS 170 require?
The MS 170 requires a 50:1 ratio of high-quality 89-octane gasoline and two-stroke air-cooled engine oil. Using Stihl HP Ultra oil is highly recommended to extend engine life.
Why is my MS 170 hard to start?
Common issues include old fuel (ethanol separation) or flooding the engine. Ensure the Master Control Lever is in the full-choke position for no more than 3-4 pulls before moving to the half-choke setting.
Can I use the MS 170 for professional tree work?
Many pros keep an MS 170 on the truck for light limbing or ground work because it is so light. However, it is not rated as a professional saw for all-day use. It lacks the magnesium crankcase and rebuildable engine components of the Stihl Pro line.
How does the MS 170 compare to the MS 180?
The MS 180 has a slightly larger 31.8cc engine producing 2.0 bhp vs the 170's 1.7 bhp. The 180 also offers the C-BE variant with Easy2Start. For most homeowners, the 170 provides the best value.
Does the MS 170 have an adjustable oiler?
No. The MS 170 has a fixed-flow oil pump that outputs a constant rate based on RPM. It is not adjustable, unlike the pro-series saws.
What chain does the Stihl MS 170 use?
The MS 170 uses a 3/8" P Picco Micro Mini 3 (PMM3) chain with a .043" gauge. Always match your replacement chain to this specification.
Is the MS 170 good for milling?
No. The MS 170 is not designed for milling. It lacks the power and oiling capacity required for the sustained load of a chainsaw mill.
