STIHL MS 261 C-BM Petrol Chainsaw | 40 cm
Universal professional chainsaw with quick chain tensioning and M-Tronic
Product description
The STIHL MS 261 C-BM is a robust, versatile professional chainsaw for forestry work in small and medium-sized stands. It is particularly suitable for limbing, cross-cutting and felling small trees and impresses with high agility and stamina in professional use. The ‘B’ in the name stands for tool-free quick chain tensioning, the ‘M’ for STIHL M-Tronic.
Common problems
Daily forestry work in changing stands brings typical challenges:
- Tensioning the chain with a tool takes noticeable time when readjusting several times a day
- Fluctuating outside temperatures and altitudes make constant engine performance difficult without electronic control
- Small nuts are easily lost when changing the cutting attachment in the forest
Solution
The MS 261 C-BM tackles this with tool-free STIHL quick chain tensioning (B) via a thumbwheel, STIHL M-Tronic (M) for automatically controlled, consistently optimum engine performance and captive nuts on the sprocket cover – three targeted answers to everyday forestry work.
Key features
- Professional chainsaw with 40 cm RS Pro cutting attachment
- STIHL M-Tronic for optimum engine performance in every situation
- STIHL quick chain tensioning (B) – tool-free retensioning via thumbwheel
- STIHL 2-MIX engine with 3.0 kW (4.1 hp) output
- STIHL Light 04 guide bar for reduced weight
- HD2 filter and long-life air filter system with pre-separation
- Captive nuts on the sprocket cover
- STIHL anti-vibration system for more comfortable working
Highlights
STIHL quick chain tensioning
A thumbwheel on the sprocket cover lets you retension the saw chain without tools – handy when readjusting several times during forestry work, with no extra combination spanner.
STIHL M-Tronic
The fully electronic engine management automatically controls ignition timing and fuel metering, taking temperature, altitude and fuel quality into account. The result: consistently optimum engine performance.
40 cm RS Pro cutting attachment
The 40 cm STIHL Light 04 guide bar with .325″ RS Pro saw chain offers high cutting performance with reduced weight.
Captive nuts
When changing the cutting attachment, the nuts on the sprocket cover can no longer be lost – a small but practical detail in the forest.
Long-life air filter system
Pre-separation and the HD2 filter remove coarse and fine particles before they reach the filter itself. This noticeably extends maintenance intervals.
Comfortable working
The STIHL anti-vibration system significantly reduces strain on arms and hands during longer forestry work.
Technical data
| Part number | 1141 200 0649 |
| Displacement | 50.2 cm³ |
| Power | 3.0 kW / 4.10 hp |
| Weight without fuel | 5.1 kg |
| Bar length | 40 cm |
| Chain pitch | .325″ |
| Chain type | Rapid Super Pro (RS Pro) |
| Sound pressure level | 105 dB(A) |
| Sound power level | 116 dB(A) |
| Vibration value left/right | 3,5 / 3,5 m/s² |
In the box
- STIHL MS 261 C-BM petrol chainsaw
- STIHL Light 04 guide bar 40 cm
- .325″ Rapid Super Pro (RS Pro) saw chain
- Combination spanner
- Operating instructions
Frequently asked questions (FAQ)
Who is the STIHL MS 261 C-BM suitable for?
The STIHL MS 261 C-BM is aimed at forestry professionals looking for a universal chainsaw for limbing, cross-cutting and felling small trees in small to medium-sized stands.
What does C-BM mean in the model name?
C stands for Comfort, B for tool-free STIHL quick chain tensioning and M for STIHL M-Tronic electronic engine management.
How heavy is the chainsaw in use?
The saw weighs 5.1 kg without fuel.
Which bar length should I choose?
35 cm is well suited to agile work in smaller stands. If you need more reach, the 40 cm version is a better choice.
What is included?
The chainsaw, STIHL Light 04 guide bar, saw chain, combination spanner and operating instructions are included.
Safety information & manufacturer details
Using a chainsaw requires experience and safe handling of the tool.
Before first use, familiarise yourself with the operation and the applicable safety regulations.
Please also note the requirements for suitable protective clothing such as chainsaw trousers, safety boots, gloves and a safety helmet with face and hearing protection.
If you are unsure about operating the machine, we recommend a personal handover and instruction from an authorised STIHL dealer.
- Read the operating instructions and safety information in full before first use.
- Wear suitable personal protective equipment.
- Use chainsaws only for their intended purpose.
Manufacturer information
STIHL Vertriebszentrale AG & Co. KG
Robert-Bosch-Straße 13
64807 Dieburg, Germany
Phone: +49 6071 204-0
Email: kundenservice@stihl.de
Data use information (Regulation (EU) 2023/2854)
| Connected products | All STIHL products connected to ‘STIHL connected’. |
| Access to product data | Product data is available in the ‘STIHL connected’ application. The product must be added first. |
| Deleting the user account | When your organisation is deleted, all linked data is removed, subject to statutory retention obligations. |
| Product data collected | Operational readiness status, service information and runtime data. |
| Data format | CSV file (Excel-compatible). |
| Data volume | Less than 1 MB per connected product. |
| Collection | Continuously in real time. |
| Storage location | Cloud infrastructure of the STIHL Group. |
| Storage period | Until the organisation is deleted, taking statutory retention periods into account. |
