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.

Stihl MS 170 Gas Chainsaw Review

But in an era where cordless battery technology is rapidly advancing, does a small-displacement gas saw still hold its ground? Our comprehensive review dives into the technical specifications, real-world ergonomics, and long-term durability of the MS 170 to determine if it remains the best value in its class.

Quick Comparison: Entry-Level Gas Chainsaws

Product	Displacement	Weight (Powerhead)	Best For	Check Price
Stihl MS 170	30.1 cc	8.6 lbs	Light pruning & firewood	🛒 Check Price on Amazon
Stihl MS 180 C-BE	31.8 cc	9.3 lbs	Added comfort & EasyStart	🛒 Check Price on Amazon
Husqvarna 120 Mark II	38.2 cc	10.7 lbs	Occasional felling	🛒 Check Price on Amazon
Echo CS-310	30.5 cc	8.8 lbs	Long-term warranty	🛒 Check Price on Amazon

Technical Performance: 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 “pro-sumer” 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’s 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 is designed to automatically adjust the air/fuel ratio when the air filter becomes restricted or partially clogged. By pulling air from the clean side of the filter, it maintains the engine’s RPM even as the filter gets dirty, extending the intervals between maintenance sessions.

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Ergonomics and Handling

Stihl has integrated several “big saw” features into this entry-level model to ensure user safety and comfort.

Anti-Vibration System

Extended use of any gas tool can lead to Hand-Arm Vibration Syndrome (HAVS). The MS 170 utilizes a multi-point anti-vibration system that decouples the engine from the handle. During our testing, the reduction in “buzz” through the grips was significantly better than budget-tier saws found at big-box retailers.

The Ematic™ Lubrication System

Chain friction is the enemy of performance. The MS 170 features the Stihl Ematic™ guide bar system, which, when used with Stihl Oilomatic® saw chain, provides targeted lubrication. Stihl claims this system can reduce bar oil consumption by up to 50% by ensuring the oil only goes where it is needed—the drive links and the bar rails.

Hardware Specs & Technical Breakdown

To understand why this saw persists in the market, we have to look at the raw data:

Engine Displacement: 30.1 cc (1.84 cu. in.)
Engine Power: 1.3 kW (1.7 bhp)
Weight (Powerhead only): 3.9 kg (8.6 lbs)
Fuel Capacity: 250 cc (8.5 oz.)
Chain Oil Capacity: 145 cc (4.9 oz.)
Guide Bar Length: 16” (Standard/Recommended)
Chain Pitch: 3/8” Pmm3 (Picco Micro Mini 3)
Power Source: Gas (50:1 Premix recommended)

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Pros & Cons

What We Like

Ultra-Lightweight: At under 9 lbs, it’s one of the easiest gas saws to swing all day.
Reliable Starting: When following the proper cold-start procedure, the saw typically fires in 3-4 pulls.
Parts Availability: Since it’s a “heritage” model, every Stihl dealer on the planet carries replacement parts and chains for the 170.
Price Point: It represents the lowest barrier to entry for a “professional grade” brand.

What Could Be Better

Side-Access Tensioner: Unlike higher-end models, the tensioner screw is located on the front, which can be slightly more cumbersome to adjust.
Fixed Flow Oil Pump: The bar oiler is not adjustable; it outputs a constant flow based on RPM.
Plastic Bumper Spikes: The stock model comes with molded plastic “dogs” (teeth). For better grip on logs, we recommend upgrading to metal bumper spikes.

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 a similar ethanol-free canned fuel, especially for users who only use the saw seasonally.

The air filter is a simple felt-style design. While effective, it requires regular cleaning with warm soapy water to ensure the engine isn’t starved of oxygen.

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Final Verdict: Is the Stihl MS 170 Worth It?

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, looking toward the Stihl MS 251 Wood Boss would be a more appropriate step up.

Our Rating: 4.5/5 – The best entry-level gas saw on the market.

Frequently Asked Questions (FAQ)

1. What is the maximum bar length for the Stihl MS 170?

The MS 170 comes standard with a 16-inch bar. While you can technically fit a 12 or 14-inch bar for better balance and cutting speed, we do not recommend going above 16 inches, as the 30.1cc engine lacks the torque to pull a longer chain through thick wood.

2. 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.

3. Why is my MS 170 hard to start?

Common issues include using 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 it to the half-choke setting.

4. Can I use the MS 170 for professional tree work?

While many pros keep an MS 170 on the truck for light limbing or ground work because it’s so light, it is not rated as a “professional” saw for all-day, every-day use. It lacks the magnesium crankcase and rebuildable engine components of the Stihl Pro line (e.g., MS 261).