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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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.
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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.
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