The Stihl MS 250 Parts Diagram is an indispensable resource for anyone who owns or operates this popular chainsaw. This comprehensive guide provides detailed illustrations and explanations of all the major components of the MS 250, making it easy to identify and locate parts, perform maintenance tasks, and troubleshoot problems.
Whether you're a seasoned professional or a first-time user, this diagram will help you get the most out of your Stihl MS 250 chainsaw.
Contents
Parts Identification and Location

The Stihl MS 250 chainsaw is a versatile and powerful tool, designed for a variety of cutting tasks. To ensure optimal performance and safety, it is crucial to have a thorough understanding of the chainsaw's components and their functions.
The following diagram provides a detailed overview of the Stihl MS 250 chainsaw, clearly labeling all major components:
[Insert diagram here]
Engine
- The engine is the heart of the chainsaw, providing the power to drive the cutting chain.
- It consists of a cylinder, piston, crankshaft, and other essential components.
Fuel System
- The fuel system delivers fuel to the engine.
- It includes the fuel tank, fuel filter, fuel line, and carburetor.
Cutting System
- The cutting system is responsible for cutting through wood.
- It consists of the guide bar, cutting chain, and sprocket.
Lubrication System
- The lubrication system provides oil to the cutting chain and guide bar, reducing friction and wear.
- It includes the oil tank, oil pump, and oil line.
Starter System
- The starter system initiates the engine.
- It includes the starter cord, starter housing, and recoil spring.
Safety Features
- The Stihl MS 250 chainsaw is equipped with several safety features, including:
- Chain brake: Stops the chain in the event of a kickback.
- Throttle lock: Prevents accidental acceleration.
- Anti-vibration system: Reduces vibrations for increased comfort.
Maintenance and Repair Procedures

The Stihl MS 250 chainsaw is a powerful and versatile tool that requires regular maintenance and repair to ensure optimal performance and longevity. This section provides a comprehensive guide to common maintenance and repair procedures, including step-by-step instructions, safety precautions, and troubleshooting tips.
Before performing any maintenance or repair work, it is crucial to read and understand the operator's manual and follow all safety instructions. Always wear appropriate safety gear, including eye protection, hearing protection, gloves, and sturdy footwear.
Replacing the Chain
Replacing the chain is a relatively straightforward procedure that can be completed in a few simple steps:
- Loosen the chain tensioner knob and remove the side cover.
- Remove the old chain by sliding it off the guide bar.
- Place the new chain on the guide bar, ensuring the cutting teeth are facing the correct direction.
- Tighten the chain tensioner knob until the chain is snug but not too tight.
- Replace the side cover and tighten the chain tensioner knob securely.
Adjusting the Carburetor
Adjusting the carburetor is essential for ensuring optimal engine performance. The following steps Artikel the procedure:
- Start the engine and let it run for a few minutes to warm up.
- Locate the carburetor adjustment screws: L (low speed), H (high speed), and T (idle speed).
- Turn the L screw clockwise to increase the fuel mixture at low speeds.
- Turn the H screw clockwise to increase the fuel mixture at high speeds.
- Turn the T screw clockwise to increase the idle speed.
- Repeat steps 3-5 until the engine runs smoothly at all speeds.
Cleaning the Air Filter
A clean air filter is crucial for ensuring proper engine performance. To clean the air filter:
- Remove the air filter cover by unscrewing the screws.
- Remove the air filter and tap it gently to remove any loose debris.
- Wash the air filter in warm, soapy water and let it dry thoroughly.
- Reinstall the air filter and tighten the screws securely.
Troubleshooting and Diagnostics

The Stihl MS 250 chainsaw is a reliable and durable tool, but like any machine, it can experience problems from time to time. If you are having trouble with your MS 250, the following troubleshooting tips may help you identify and resolve the issue.
Before troubleshooting, ensure you have read and understood the chainsaw's user manual. If the problem persists after following the troubleshooting steps, contact a qualified repair technician.
Common Problems and Solutions
- Engine won't start:
- Check the fuel level and ensure the fuel is fresh.
- Inspect the spark plug and replace it if necessary.
- Clean the air filter.
- Check the fuel lines for leaks or blockages.
- Engine runs rough:
- Check the spark plug and replace it if necessary.
- Clean the carburetor.
- Adjust the carburetor.
- Chain won't cut:
- Check the chain tension and adjust it if necessary.
- Sharpen the chain.
- Inspect the guide bar and replace it if necessary.
- Chain comes off the guide bar:
- Check the chain tension and adjust it if necessary.
- Inspect the guide bar and replace it if necessary.
- Check the sprocket and replace it if necessary.
- Saw chain is smoking:
- Check the chain tension and adjust it if necessary.
- Check the chain lubrication and ensure the oiler is working properly.
- Inspect the guide bar and replace it if necessary.
Assembly and Disassembly s

To ensure optimal performance and safety, proper assembly and disassembly of the Stihl MS 250 chainsaw is crucial. This guide provides detailed instructions, diagrams, and safety guidelines to facilitate these processes effectively.
Before initiating any assembly or disassembly procedures, it is imperative to disconnect the spark plug to prevent unintentional starting of the chainsaw.
Sub-components Assembly, Stihl ms 250 parts diagram
Begin the assembly process by attaching the guide bar and chain to the chainsaw body. Ensure the chain is correctly tensioned and lubricated. Subsequently, install the chain brake and handguard, ensuring they function smoothly.
Next, assemble the starter unit by connecting the starter cord, recoil spring, and starter handle. Ensure proper alignment and secure all components tightly.
Finally, attach the fuel tank and carburetor, making sure all connections are secure and fuel lines are free of kinks or leaks.
Disassembly Procedure
To disassemble the chainsaw, follow the assembly steps in reverse order. Begin by removing the fuel tank and carburetor, followed by the starter unit components.
Subsequently, detach the chain brake and handguard. Carefully remove the guide bar and chain, ensuring the chain tension is released.
Finally, inspect all components for wear or damage and replace as necessary.
Technical Specifications and Features
The Stihl MS 250 chainsaw is a powerful and versatile tool designed for a wide range of cutting tasks. Its compact size and lightweight design make it ideal for homeowners and professionals alike.
The chainsaw is powered by a 2.3 kW (3.1 hp) engine that delivers excellent cutting performance. The chain speed of 14.5 m/s (47.6 ft/s) ensures fast and efficient cutting through even the toughest materials.
Weight and Dimensions
- Weight: 4.6 kg (10.1 lbs)
- Length: 45 cm (17.7 in)
- Width: 25 cm (9.8 in)
- Height: 28 cm (11 in)
Power and Performance
- Engine power: 2.3 kW (3.1 hp)
- Chain speed: 14.5 m/s (47.6 ft/s)
- Bar length: 35 cm (14 in)
- Chain pitch: 3/8 in
- Chain gauge: 0.050 in
Unique Features and Advantages
- Anti-vibration system: Reduces vibration levels for increased comfort during extended use.
- Tool-less chain tensioning: Allows for quick and easy chain adjustments without the need for tools.
- Side-access chain tensioner: Provides easy access to the chain tensioner for quick adjustments.
- Ergonomic design: The chainsaw is designed for comfort and ease of use, with a well-balanced design and comfortable handles.
Last Point: Stihl Ms 250 Parts Diagram

In conclusion, the Stihl MS 250 Parts Diagram is an essential tool for anyone who wants to keep their chainsaw running smoothly and efficiently. With its clear illustrations and detailed explanations, this guide makes it easy to identify and locate parts, perform maintenance tasks, and troubleshoot problems.
So whether you're a seasoned pro or a first-time user, make sure to keep this diagram handy for all your Stihl MS 250 chainsaw needs.
User Queries
What is the Stihl MS 250 Parts Diagram?
The Stihl MS 250 Parts Diagram is a detailed illustration of all the major components of the Stihl MS 250 chainsaw. It provides clear and concise explanations of each component, making it easy to identify and locate parts.
How can I use the Stihl MS 250 Parts Diagram?
The Stihl MS 250 Parts Diagram can be used for a variety of purposes, including:
- Identifying and locating parts
- Performing maintenance tasks
- Troubleshooting problems
Where can I find the Stihl MS 250 Parts Diagram?
The Stihl MS 250 Parts Diagram can be found online at the Stihl website or in the owner's manual for the MS 250 chainsaw.


