Husqvarna 257 Workshop Manual Repair
Husqvarna 257 Workshop Manual for the Husqvarna chainsaw. Repair and service the 257 with this manual. The manual has diagrams and accurate information as used by mechanics and repair shops to troubleshoot and repair the chainsaw. View free page images online or download a full PDF that you can print or view on any suitable device.
The manuals have plenty of pictures and diagrams to help with repairs and servicing. May be used as a guide for other models as they may share key components such as motors.
More carburetor Manuals HERE and a 257 chainsaw parts list HERE. A chainsaw search (magnifier icon) at top of this page, as well as a 257 chainsaw repair help question and answer page HERE.
Husqvarna 257 Workshop Manual Contents
Index may vary with model number
Introduction, Specifications, Troubleshooting, Attachments, Air Filter, Carburetor, Crankcase, Clutch, Engine, Ignition, Starter, Servicing, Controls, Fuel System, Electrics, Special Tools.
This PDF manual helps you find the information you need quickly and easily. it provides a detailed description of for trouble shooting, repair and testing of the chain saw.
Husqvarna 257 Chainsaw Specifications
YEAR INTRODUCED: 1994
YEAR DISCONTINUED: 2001
ENGINE DISPLACEMENT: 57 ccm 3.47 cu. in.)
CYLINDER BORE: 46 mm
PISTON STROKE: 34 mm
CYLINDER TYPE: Chrome plated aluminum
INTAKE METHOD: Piston ported
MANUFACTURER ADVERTISED H.P.: 2.7 kW (3.7 hp)
WEIGHT: 5.6 kg (12.3 lbs.) powerhead only:
CHAIN BRAKE: Inertia activated
DRIVE TYPE: Direct
CONSTRUCTION: Die cast magnesium, injection molded plastic
MAGNETO TYPE: Electronic Electrolux ET
CARBURETOR: Walbro HDA-120
MAJOR REPAIR KIT: K20-HDA
MINOR REPAIR KIT: D10-HDA
AIR FILTER SYSTEM: Nylon mesh cartridge
STARTER TYPE: Automatic rewind
OIL PUMP: Automatic, worm gear driven
MAXIMUM ENGINE RPM: 9,000 under load, 13,000 free
IDLE RPM: 2,700
IGNITION TIMING: fixed
BREAKER POINT SETTING: none
FLYWHEEL/COIL AIR GAP: 0.3 mm (.012 in.)
SPARK PLUG TYPE: Bosch WS7F
SPARK PLUG GAP: .05 mm (0.020 in.)
CRANKSHAFT MAIN BEARINGS: Ball
FUEL OIL RATIO: 50:1
RECOMMENDED FUEL OCTANE: Regular grade
MIX OIL SPECIFICATION: Electrolux approved 2-cycle type
SHORTEST GUIDE BAR SUPPLIED: 33 cm (13 in.)
LONGEST GUIDE BAR SUPPLIED: 51 cm (20 in.)
Husqvarna 257 Workshop Manual Diagrams
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