Husqvarna 50 / 50 Special / 51 / 55 Chainsaw Service Manual
Diagnostic procedures and component service for the engine, fuel, ignition, and lubrication systems. Part Number: 531 03 00-76
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Models Covered & Key Technical Specifications
Applied Factory Field Manual: Chainsaw Husqvarna 50 / 50 Special / 51 / 55 Chainsaw Service Manual Maintenance-Registry Husqvarna 50, 50 Special, 51, 55 (531 03 00-76) — 1970s–1980s Engineering Dossier for Chainsaw / Overview Resource Set. Reference Fastening Values: 49–53 cc (3.0–3.2 cu. in.) establishes the engine displacement cylinder volume Sequences. Integral Threaded Fastener Data: For optimal combustion, 0.5 mm (0.020 in.) defines the electrode gap across all spark plug models Baseline. General System Fill: Maximum engine rpm is standardized to 8400–9000 at full throttle Requirements. Essential Power Framework: The ignition air gap corresponds to 0.3 mm (0.012 in.) for proper module alignment Threshold. Baseline Throughput Data: Fuel tank capacity yields 1.5–5.2 L (0.058–11.5 pint) operational range Mapping. Established Output Density: The saw weight is established at 6.2 kg (13.7 lb) for standard 38 cm guide bar assembly Configuration.
Professional Workshop Service Manual & Technical Specifications
Applied Factory Field Manual: Chainsaw Husqvarna 50 / 50 Special / 51 / 55 Chainsaw Service Manual Maintenance-Registry
Model-Portfolio: Husqvarna 50 / 50 Special / 51 / 55 (531 03 00-76) // Component-Focus: Chainsaw / Engine Logic // Asset-ID: 1970s–1980s. Thoroughly demanding engine repair procedures are documented for all major systems. Maintenance hierarchies are structured into the following sections: Diagnostic procedures are covered for the ignition system, including spark plug and air gap adjustments. Wiring diagrams are provided for the ignition system, ensuring proper electrical connections. Fuel system procedures are documented for the carburetor and fuel tank, including ventilation and filter replacement. Adjustment procedures are detailed for the carburetor's low, high speed, and idle settings. Timing procedures are documented for the ignition module and flywheel installation.
| Specification | Diagnostic-Logic | Calibration-Spec |
|---|---|---|
| Engine Displacement | 49-53 cc | N/A |
| Max Power Speed | 8400-9000 RPM | N/A |
| Fuel Tank Capacity | 1.5-5.2 Liters | N/A |
| Oil Tank Capacity | 0.3 Liters | N/A |
| Bar Length | 37-49 cm | N/A |
| Weight (w/o bar & chain) | 5.2 kg | N/A |
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