STIHL MS 181 C-BE Vs MS 251 C-BE : What’s The Difference

STIHL MS 181 C-BE Vs MS 251 C-BE: Both chainsaws have STIHL’s Easy2Start technology, which makes them easier to start; in fact, the MS 251 C-BE has a redesigned starter handle for even more convenient starting. Both models also feature Quick Chain Adjusters and an anti-vibration system, which make working with these best Stihl chainsaws easier and more comfortable.

Detail Comparison

Technical specifications MS 181 C-BE MS 251 C-BE
Displacement ­cm³ 31,8 45,6
Power output ­kW/bhp 1,5/2 2,2/3
Weight ­kg 4,6 1) 5,1 1)
Power-to-weight ratio ­kg/kW 3,1 2,4
Sound pressure level ­dB(A) 100 2) 103 2)
Sound power level ­dB(A) 112 3) 114 3)
Vibration level left/right ­m/s² 3,5/3 4) 3,9/3,9 4)
Saw chain pitch ­ 3/8″P .325″
STIHL Oilomatic saw chain type ­ Picco Micro Mini 3 (PMM3) Rapid Micro (RM)


The MS 181 C-BE is an excellent consumer-grade chainsaw for property owners who want a lightweight, easy to use tool. It’s perfect for cutting firewood, trimming trees and general yard work. This MS 181 model has many features that make it a great choice for beginners or seasoned professionals alike.

STIHL MS 181 C-BE Vs MS 251 C-BE

The STIHL Easy2Start system makes starting the saw incredibly easy. It requires very little effort on the user’s part, with almost no resistance from the pull cord. Once started, the engine stays at idle until you squeeze the throttle trigger to engage it. This ensures that the engine starts quickly, and won’t cut off unexpectedly in the middle of a job.

The Advanced Quickstop feature will instantly stop the chain if you release the throttle trigger, which is perfect for new or inexperienced users—it can be difficult to control a running chain saw, especially when you’re still getting used to its power and weight.


The STIHL MS 251 C-BE chainsaw is as powerful and fuel-efficient as the MS 241 C-BE, but features a Quick Chain Adjuster. This model also features an advanced anti-vibration system and side-access chain tensioner. The MS 251 C-BE starts fast, runs smooth and has enough power to handle demanding cutting jobs.

STIHL Easy2Start™ technology is available on select models of STIHL chain saws and pole pruners. This special starting procedure eliminates the need for a strong pull on the starting cord when starting your STIHL product. Side-Access Chain Tensioner: Side access chain tensioning allows for quick and convenient chain adjustment when you’re out in the field. 

STIHL MS 181 C-BE vs MS 251 C-BE|Engine Displacement

The first thing to know about the MS 181 C-BE and the MS 251 C-BE is that they are from the same series of chainsaws. This means that they have many similarities, but one key difference that makes them suitable for different purposes. The main difference between these two chainsaws is in engine displacement: while the MS 181 C-BE has a 30.1 cc engine, the MS 251 C-BE’s engine measures 46.6 cc. Because of this difference, the MS 251 C-BE will cut faster than the MS 181 C-BE, and it will also cut larger wood pieces: up to 18 inches versus up to 14 inches for the MS 181 C-BE.

STIHL MS 181 C-BE vs MS 251 C-BE|Power output

The STIHL MS 181 C-BE and the STIHL MS 251 C-BE are both lightweight chainsaws that make it easy for you to cut through trees or bushes in your yard. They both have a Quick Chain Adjuster, which means you do not need any tools to adjust the chain tension on your chainsaw. Both models also feature Easy2Start technology, which makes starting the engine much easier than it would be with other chainsaws. So what is the difference between these two models?

The first key difference is the power output of each of these chainsaws. The MS 181 C-BE has a power output of 1.5 kilowatt (kW). This is slightly less than the power output of the MS 251 C-BE, which has an output of 2.2 kilowatt (kW). Although this small change may not seem like much, it does noticeably increase how quickly you can cut through wood and how much wood you can cut before having to stop and refuel your chainsaw again.

STIHL MS 181 C-BE vs MS 251 C-BE|Weight

The STIHL MS 251 C-BE chainsaw is a mid-sized model in STIHL’s line of homeowner-grade chainsaws. Its predecessor, the MS 181 C-BE, is also a mid-sized model and has several similar features. They both feature an electronic quickstop chain brake that engages in less than a tenth of a second if kickback occurs. They also both have STIHL ErgoStart technology, which means they require 50% less effort to start than previous models and you can start them with just one hand. They both have 2-MIX engines, meaning they are fuel efficient and environmentally conscious.

The MS 251 C-BE has a slightly longer guide bar than the MS 181 C-BE and can be purchased with either an 18″ or 20″ bar or a longer 20″ bar, while the MS 181 C-BE only comes with an 18″ bar. These chainsaws are great for homeowners who need to cut larger trees for firewood or doing some light pruning around their property.

STIHL MS 181 C-BE vs MS 251 C-BE|Power-to-weight ratio

The MS 181 C-BE and MS 251 C-BE are both part of the STIHL Homeowner Series. They are both lightweight, compact chainsaws that use an efficient engine to create a high power-to-weight ratio. But what’s the difference? Well, there are several differences between these two chainsaws that make them suited for different uses. The STIHL MS 181 C-BE has a lower displacement engine than the STIHL MS 251 C-BE, producing 2.9 cubic centimeters of displacement versus 3.3 cubic centimeters in the larger model.

That means it produces less power, but also makes it more lightweight. This can be good when you need something maneuverable in tight spaces or if you plan to use it for extended periods of time and want something with less weight to hold up—though this is not recommended by STIHL. The STIHL MS 181 C-BE weighs just under seven pounds while the STIHL MS 251 C-BE weighs just over eight pounds. Both models use catalytic converters to reduce emission levels and make them more environmentally friendly for everyday home use as well as competitive work environments.

STIHL MS 181 C-BE vs MS 251 C-BE|Sound pressure level

 The STIHL MS 181 C-BE is a small, lightweight chainsaw designed for occasional use in residential areas. This model has a 30.1 cc engine that delivers 1.5 kW (2 hp) of power at 9,500 rpm and 4.4 m/s² vibration levels to the handles.

The MS 181 C-BE also features a variety of features that make it more comfortable and convenient to use than other available professional chainsaws, such as an Easy2Start™ system that makes starting this saw easier than ever before, an anti-vibration system that reduces the amount of vibration on your body while you work, and a Quick Chain Adjuster that allows users to adjust chain tension quickly without tools.

The STIHL MS 181 C-BE is equipped with all the same features as its predecessor – the MS 170 – but adds some new ones: it’s lighter weight, which means less effort required on your part when using it; it also has a Quick Chain Adjuster and a new carburetor design for improved fuel economy over previous models from STIHL’s lineup.

STIHL MS 181 C-BE vs MS 251 C-BE|Sound power level

The MS 181 C-BE chainsaw is one of the newest models in the STIHL lineup. It is equipped with a number of innovative features including the STIHL Easy2Start™ system, making this chainsaw virtually effortless to start. The STIHL Easy2Start™ system works by eliminating the need for a strong pull of the starting cord, so there is less force required to get your chainsaw going.

This saw also comes with Quick Chain Adjuster, which allows you to easily adjust your chain tension while still wearing work gloves. The MS 181 C-BE has many features that make it an ideal choice for homeowners or light woodcutters who are looking to upgrade from a small electric chainsaw.

STIHL MS 181 C-BE vs MS 251 C-BE|Vibration level left/right

The STIHL MS 181 C-BE is a lightweight, efficient chainsaw with convenient features like the Quick Chain Adjuster, Chain Quick Tensioning (B) and ErgoStart (E). It also has a pre-separation air filtration system—extending the cleaning life of the air filter so you have less maintenance. With low-emission engine technology and additional “Comfort” features, this chain saw is built for fuel efficiency as well as low vibrations.

The MS 181 C-BE comes with a 14″ bar and chain, ideal for cutting firewood and felling smaller trees. The MS 251 C-BE is a great choice if you’re looking for that extra power without going to the professional range. This unit is packed with features like the STIHL Easy2Start™ system making starting virtually effortless; a low exhaust emission engine; and an advanced anti-vibration system for comfort during those long work hours. Its 2.4 horsepower engine delivers consistent cutting performance in the widest variety of conditions, from mowing to thinning small stands of trees.

STIHL MS 181 C-BE vs MS 251 C-BE|Saw chain pitch

The STIHL MS 181 C-BE and MS 251 C-BE chainsaws share many similarities, as well as some important differences. Hopefully, this guide will help you decide which saw is right for you. The first thing we will look at is the chain pitch. The pitch of the chain determines the size of the drive link which connects it to the bar and tensioner. It also determines the amount of slack in between each chain link.

A smaller pitch means less slack in between links and a smaller drive link width. The STIHL MS 181 C-BE has a 3/8″ low profile pitch as opposed to the 1/4″ low profile pitch on the STIHL MS 251 C-BE. This means that with every rotation of the chain, there will be less slack in between links on the MS 251 C-BE than on the MS 181 C-BE with all other factors held constant. 

STIHL MS 181 C-BE vs MS 251 C-BE|STIHL Oilomatic saw chain type

STIHL MS 181 C-BE and MS 251 C-BE are two of the most powerful chainsaws you will ever find. The STIHL MS 181 C-BE has a displacement of 30.1 cc, while the STIHL MS 251 C-BE has a displacement of 45.4cc. The chain speed of both chainsaws are the same and their weight is also not far off from each other. The cutting performance of both chainsaws is also comparable, with both of them having cutting capacities between 12 inches and 20 inches.

However, there are differences in terms of the technology that powers these chainsaws and their components. The STIHL MS 181 C-BE uses a STIHL 1-MIX engine, which is an advanced technology that allows for better fuel efficiency and reduced emissions at the same time. This advanced technology involves a precise mixture of oil and gas in order to make more efficient use of fuel.

STIHL MS 181 C-BE vs MS 251 C-BE|which is more better

First of all, consider the weight of the tool you’re going to be using. The MS 181 is a full pound lighter than the MS 251, which could make a big difference to someone who’s not accustomed to working with these tools. The difference in weight comes from a combination of smaller parts and less fuel—the MS 181 has an 18 oz. fuel capacity while the MS 251 holds 20 oz.

Also consider what you’re going to be doing with this tool. Although both have similar engine power and bar length, the MS 251 has a larger fuel tank and more cutting power overall. If you’re looking for something to handle small jobs around the house or for occasional use on your property, the smaller size and lower price tag of the MS 181 would work well for you.

We have decided to write this article to highlight all the differences between these two models and help you decide which one is better for you. There are some differences, but there aren’t a huge amount of differences as these two models are essentially the same, just with a bigger engine. The biggest difference is that the STIHL MS 251 has an increased engine size which means it has more power and torque. These two chainsaws are designed for homeowners who want to trim trees, chop firewood and complete basic tasks around the garden.

STIHL MS 181 C-BE Vs MS 251 C-BE Summary

The Stihl MS 181 C-BE (14-inch bar) and MS 251 C-BE (16-inch bar) are both great, mid-range chainsaws that offer some top-of-the-line features. However, they aren’t identical—there are some key differences between the two that could sway your purchasing decision.