Stihl 021 023 025 Instruction Manual

Pages 60

Year 2001

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of 60

Stihl 021 023 025 Specification

The Stihl 021, 023, and 025 chainsaws are part of Stihl's renowned series of lightweight, reliable chainsaws designed for efficiency and ease of use. Each model in this series is engineered with a two-stroke engine that provides a balance of power and fuel efficiency, making them suitable for a variety of tasks from light to medium-duty cutting.

The Stihl 021 features a 35.2 cc engine, offering sufficient power for small to moderate tasks, while the 023 is equipped with a 45 cc engine, providing more capability for demanding jobs. The 025, being the most powerful in the series, contains a 45.4 cc engine, making it ideal for more intensive cutting tasks.

All three models incorporate an anti-vibration system that reduces operator fatigue, enhancing comfort during extended use. They also feature a side-access chain tensioner, which simplifies the adjustment of the chain, improving user convenience. The inclusion of an automatic chain lubrication system ensures optimal chain performance and longevity by delivering consistent lubrication during operation.

The chainsaws are equipped with a Master Control Lever, a single-lever operation system that integrates the choke, start, throttle, and stop functions, streamlining the starting process. Safety features include a chain brake system that stops the chain almost instantly in the event of kickback, providing enhanced operational safety.

With a curb weight ranging from 4.6 kg to 4.9 kg depending on the model, these chainsaws are designed for maneuverability without compromising on durability. They are constructed with high-quality materials to withstand regular use and challenging conditions, making the Stihl 021, 023, and 025 chainsaws a popular choice among homeowners and professionals alike for their reliability and performance.

Stihl 021 023 025 F.A.Q.

How do I start my Stihl 021, 023, or 025 chainsaw?

To start your Stihl chainsaw, ensure the chain brake is engaged, switch the master control to the start position, pull the starter rope until the engine fires, then push the choke back in and pull the rope again until the engine runs.

What fuel mix should I use for my Stihl chainsaw?

Stihl chainsaws require a 50:1 fuel mix ratio, using high-quality 2-cycle engine oil and fresh unleaded gasoline with a minimum octane rating of 89.

How often should I clean the air filter on my Stihl chainsaw?

Clean the air filter after every 10 hours of operation or more frequently in dusty conditions to ensure optimal performance.

What is the correct tension for the chain on my Stihl chainsaw?

The chain should be tight enough that you can lift it slightly from the guide bar but not so loose that the drive links come out of the bar groove. Check the tension with the saw off and cool.

How can I identify if the spark plug needs replacing on my Stihl chainsaw?

Check the spark plug for signs of wear or carbon build-up. If the insulator is cracked, electrodes are burned, or the plug is heavily fouled, it should be replaced.

What are the steps to sharpen the chain on my Stihl 021, 023, or 025?

To sharpen the chain, secure the chainsaw, engage the chain brake, use a round file to sharpen each cutter at the correct angle, and file all teeth to the same length.

Why does my Stihl chainsaw chain keep coming off?

The chain may come off due to improper tension, a worn-out bar or chain, or incorrect installation. Check and adjust the tension, inspect the bar and chain for wear, and ensure proper installation.

How do I troubleshoot my Stihl chainsaw if it won't start?

Check the fuel mix, spark plug, air filter, and carburetor. Ensure the chainsaw has fresh fuel, a clean air filter, and a working spark plug. If these are fine, the carburetor might need adjustment or cleaning.

What maintenance should I perform regularly on my Stihl chainsaw?

Regular maintenance includes cleaning the air filter, checking and sharpening the chain, inspecting the spark plug, cleaning the guide bar groove, and checking chain tension.

How do I properly store my Stihl chainsaw when not in use for extended periods?

Drain the fuel tank, run the engine until it stops, clean the chainsaw, remove the chain and bar, and store them separately. Keep the chainsaw in a dry place, protected from dust and moisture.