STIHL 021, 023, 025 Chainsaw Service Manual

Field service reference for STIHL chainsaws including 021, 023, and 025 models. Documents engine, fuel system, and ignition system diagnostics. PN 1123 020 1219

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Document Details

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Document Number / Seller:
30194 / Sandra Wright
File Size:
8.31 MB
File Type:
PDF
Language:
English
Printable:
Yes
Category:
Chainsaw
Last updated / verified
Feb 2, 2025

Models Covered & Key Technical Specifications

STIHL 021, 023, 025 Chainsaw Service Manual | Essential Calibration Archive. Comprehensive Diagnostics & Repair Procedures Documentation-Framework

  • Displacement: 35.2 cm3 is designed for engine operation.
  • Bore: 40 mm requires standard assembly.
  • Stroke: 28 mm is measured at 1.10 in.
  • Power Output (ISO 7293): 1.5 kW delivers peak performance.
  • Idle Speed: 2,800 rpm establishes consistent operation.
  • Clutch Engagement: 3,500 rpm is designed for safety standards.

Professional Workshop Service Manual & Technical Specifications

Essential Calibration Reference Manual: STIHL 021, 023, 025 Chainsaw Service Manual - Comprehensive Diagnostics & Repair Procedures Documentation-Framework

Engine Specs: Operational-Framework // System Coverage: Service-Level / Engine Logic // Documented Procedures: Detailed.

Metric Rating Calibration-Data
Displacement 35.2 cm3 40.2 cm3
Bore 40 mm 42.5 mm
Stroke 28 mm 32 mm
Power Output (ISO 7293) 1.5 kW (2.0 bhp) 2.2 kW (3.0 bhp)
Idle Speed 2,800 rpm 3,500 rpm
Clutch Engagement 3,600 rpm 3,500 rpm

Cataloging major assemblies into distinct chapters, this document provides an in-depth look at the STIHL 021, 023, and 025 Chainsaws. It includes detailed information on component specifications, maintenance procedures, and troubleshooting guides.

Engine Overhaul

Thoroughly requiring a systematic approach, this section details the engine's components and their servicing. It covers disassembly and assembly of critical parts like the crankshaft, piston, and connecting rod.

Fuel and Ignition Systems

Detailed examination of the fuel system, including the carburetor, air filter, and fuel tank, is provided. The ignition system, from the spark plug to the ignition module, is also comprehensively documented.

Repair Procedures

Specific procedures for servicing various assemblies are outlined, including the chain brake, clutch, rewind starter, and AV handle system. Proper torque specifications are documented for thread engagement security to ensure proper functionality.

Special Tools and Aids

The manual also details specialized tools and servicing aids recommended for efficient and accurate repairs, ensuring professional results.

FAQ

Reference the **specified** tool requirements for disassembling the clutch drum? keyboard_arrow_down

5910 890 2000 is the specified clamp required for mounting the machine on an assembly stand, facilitating easier clutch drum disassembly.

What are the **essential** electrical values for the ignition system? keyboard_arrow_down

0.2 - 0.4 mm is the essential air gap specification for the electronic magneto ignition, with a spark plug electrode gap of 0.5 mm.

Specify the **correct** calibration settings for the carburetor. keyboard_arrow_down

For standard carburetor settings on the 021, High speed screw (H) is approximately 1 turn open, and Low speed screw (L) is approximately 1 turn open. For the 023 L and USA models, the H screw is preset, and the L screw is 1 full turn open from its seat.

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Reviews (5)

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This manual is incredibly comprehensive! The instructions are clear and easy to follow. I love how it covers both safety precautions and detailed assembly steps. Definitely worth it!
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The download was fast and hassle-free. I received the link almost instantly after purchase. The manual itself is very well organized and useful!
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I found the troubleshooting section particularly helpful. The email support was also quick to respond when I had a question about the download link. Very professional!
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Rated 5 out of 5 stars
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The manual is great overall, but I wish there were more illustrations in some sections. Still, the email support was fantastic and answered my questions promptly!