Stihl MS 170 Vs MS 251 : Which Is Better?

In the case of MS 170 Vs MS 251 , there isn’t that much difference between the two products when you look at them in the general sense. If you’re trying to make a pick between which one you should buy, here are something to think about before making that decision.

MS 170 Vs MS 251: Detail Comparison

Technical specifications MS 170 MS 251
Displacement ­cm³ 30,1 45,6
Power output ­kW/bhp 1,2/1,6 2,2/3
Weight ­kg 4,1 1) 4,8 1)
Power-to-weight ratio ­kg/kW 3,4 2,2
Sound pressure level ­dB(A) 100 2) 103 2)
Sound power level ­dB(A) 111 3) 114 3)
Vibration level left/right ­m/s² 5,2/5,5 4) 3,9/3,9 4)
Saw chain pitch ­ 3/8″P .325″
STIHL Oilomatic saw chain type ­ PMM3 Rapid Micro 3 (RM3)


The MS 170 and MS 251 are both STIHL brand chainsaws, so it can be confusing to compare them. They are both in the same class of chainsaws and have many similar features. The MS 170 is a lightweight saw with an 18″ bar length. It weighs only 7.5 pounds, which makes it easy to handle and maneuver around your yard or job site. This saw has a 1.6 HP engine that runs at 3200 RPMs, which means it can cut through logs up to 20 inches long with ease.

MS 170 is the perfect lightweight chainsaw for homeowners seeking a great value. Compact, lightweight with just the right amount of power, the MS 170 makes quick work of trimming or cutting small trees, fallen limbs after a storm, and other tasks around the yard. And its streamlined design makes it easy to handle and maneuver.


The STIHL MS 251 WOOD BOSS® Chainsaw is designed to deliver all the power you’d expect from STIHL equipment, yet with a comfortable and ergonomic design. This chain saw features our pre-separation air filtration system— extending the cleaning life of the air filter so you have less maintenance. With an advanced anti-vibration system, your hands and arms will remain comfortable during extended use. The MS 251 also features a Quick Chain Adjuster, making it easier than ever to change your chain. An excellent choice for felling, firewood cutting and storm cleanup, this dependable model is a great value.

The MS 251 is a new STIHL installation with a 2-MIX engine, which has better fuel efficiency. It also has higher torque, so it’s easier to cut through thick wood. The chainsaw also has an adjustable oil pump, which reduces oil consumption by only distributing the exact amount of oil needed for the job. This can be very beneficial in situations where there are multiple users who may use the chainsaw at different rates. The MS 170 and MS 251 both have an anti-vibration system that reduces user fatigue while working.

The MS 251 also has a larger fuel tank, which means you don’t have to stop as often to fill up. Both models also have an automatic chain lubrication system that automatically applies oil to the chain and bar when necessary, which makes cutting more efficient and reduces wear on the tool.

STIHL MS 170 vs MS 251|Engine Displacement

MS 170 Vs MS 251

STIHL MS 170 is a 2-stroke engine with a displacement of 172 cc. The STIHL MS 251, on the other hand, has a displacement of 251 cc. This means that the STIHL MS 170 is 2-stroke engine and the STIHL MS 251 is a 4-stroke engine. STIHL MS 170 Vs MS 251 : What’s The Difference? The STIHL products are known for their durability and power.

A bigger displacement means more power and vice versa. So if we compare these two models based on their engine displacement then we will find that the ST.

STIHL MS 170 vs MS 251|Power output

The STIHL MS 170 is a powerful, yet lightweight saw designed for professional use. It has a power output of 2.5 hp, which is enough to cut through even the toughest branches and limbs with ease. The MS 251 is also a powerful saw that has a power output of 3.2 hp, making it more than capable of handling even the most difficult jobs. The MS 170 weighs in at 9 pounds and has an overall length of 17 inches, while the MS 251 weighs 16 pounds and has an overall length of 22-3/4 inches. Both models are easy to handle and operate.

The STIHL MS 170 is a chainsaw that produces 4.2 kW of power. The STIHL MS 251, on the other hand, produces 5.1 kW of power. The difference in power output may not seem like much but it can make a huge difference when you are cutting through large trees and branches. If you need to cut through thick trees, then you will want a stihl chainsaw with more power than the one that has less power output.

STIHL MS 170 vs MS 251|Weight

The first thing you notice when you pick up the MS 251 is that it is quite a bit heavier than the MS 170. On paper, the MS 170 weighs in at 9.3 lbs and the MS 251 weighs in at 11.3 lbs. The extra two pounds of weight on the MS 251 make a big difference in how it feels when you are using it over a long period of time.

Both are powerful chainsaws that can cut through the toughest of materials, but they are designed for different purposes. The STIHL MS 170 is a lightweight chainsaw built for homeowners who need to do more than just trimming and pruning.

STIHL MS 170 vs MS 251|Power-to-weight ratio

The MS 251 is a professional-grade saw, so it’s no surprise that it’s more powerful than the MS 170. It has a much higher power-to-weight ratio (more than twice as powerful), which means that it’s able to cut through thicker branches and logs with less effort on your part.

In the power-to-weight ratio category, the STIHL MS 170 is a better choice because it has a lower net weight and has a more powerful engine. The STIHL MS 251 is rated for 17.2 cc and has an air-cooled two-stroke engine that provides power to cut through anything you need to cut with ease. The MS 170 is rated for 18 cc and has an air-cooled two-stroke engine that provides power to cut through anything you need to cut with ease. In the noise level category, the STIHL MS 251 is a better choice because it makes less noise than other chainsaws of its class.

STIHL MS 170 vs MS 251|Sound pressure level

The amount of noise generated is referred to as sound pressure level (SPL) and it is measured in decibels (dB). The noise levels of most chainsaws range from about 108 dB (without hearing protection) to 113 dB (with hearing protection). This means that chainsaw operators should always wear protective gear when operating chainsaws. The STIHL MS 170 is a mid-range chainsaw for occasional use on light jobs around the home such as cutting firewood or felling smaller trees.It features an efficient engine delivering 12% higher performance than its predecessor model but with lower fuel consumption and emissions.

In terms of sound pressure level, the MS 251 is noticeably quieter than its smaller counterpart. However, if you intend to use this saw for heavy duty work or extended periods of time, then it may be worth investing in a higher powered machine such as the Stihl MS 361 or Husqvarna 455 Rancher. In addition to having more power and less noise pollution than their smaller cousins, these larger models also feature anti-vibration technology that reduces user fatigue and increases productivity while working around large objects like logs or stumps.

STIHL MS 170 vs MS 251|Vibration level left/right

Both the MS 170 and the MS 251 have anti-vibration systems on the front and back handles to reduce vibration by up to 50 per cent, but the MS 170’s anti-vibration system is slightly more effective than that of the MS 251.

The vibration levels of the Stihl MS 170 and the MS 251 are quite similar. This means that from a purely technical standpoint, there is very little difference between the two products when it comes to vibration level in the handle.

STIHL MS 170 vs MS 251|STIHL Oilomatic saw chain type

What is STIHL Oilomatic Saw Chain? The STIHL oilomatic saw chain is a great example of what makes a STIHL chainsaw such a unique piece of machinery. This saw chain is designed to provide maximum performance with minimum vibration across all of the different models in the MS range. In fact, you can use it on any model in this range except for those that come with Picco Micro 3 or PM3 saw chains as standard.

The saw chain has a special design that allows you to cut through even the toughest timber without having to worry about jamming. This means that it’s ideal for professional users who may need to make big cuts through thick trunks. The reduced vibration that comes from the cutting process also ensures that you’ll be able to make these cuts without suffering from hand fatigue or other associated problems. A closer look at the STIHL oilomatic saw chain reveals some.

STIHL MS 170 vs MS 251|which is more better

If you’re looking for a lightweight and easy-to-use chainsaw, the STIHL MS 170 may be the best choice for you. It’s a great tool for homeowners who need to cut branches and trees on their property. The MS 251, on the other hand, is more powerful than its predecessor and can cut through larger pieces of wood with ease. It’s also equipped with an automatic oiler that helps prevent rust and wear, so it’ll last longer than other similar models on the market today.

The MS 251 has an automatic oiler that automatically lubricates the chain while you’re working without having to stop every few seconds to pour oil into your saw manually like you do with most other chainsaws in this price range (the MS 170 doesn’t have an automatic oiler).

The STIHL MS 251 chainsaw is a great tool that can be used for a variety of projects. It has many features that make it an excellent choice for homeowners. The STIHL MS 251 is powered by a 17.5 cc motor that provides enough power to cut through larger tree limbs and logs. The 16” bar is made from forged steel, so it can withstand more abuse than the typical chain. The chain is also specially designed to reduce kickback, which reduces the risk of injury during use.

STIHL MS 170 vs MS 251:The STIHL MS 251 has several advantages. First, it has more power (17.5 cc), allowing you to cut through larger limbs with ease. Second, it has a bigger cutting bar (16” vs 14”). Third, it has an automatic oiler that distributes oil evenly throughout the engine over time to keep things running smoothly and prevent maintenance issues down the road.


Finally, there are no exposed moving parts on the STIHL MS 251, making it safer for homeowners who may not have experience operating chainsaws before or who don’t want to take any risks when using this powerful tool around trees or other objects.