Husqvarna 51 Workshop Service Manual

Husqvarna 51 Workshop Manual Repair

Husqvarna 51 Workshop Service Manual for the Repair of the Husqvarna 51 chainsaw. The PDF workshop service manual has accurate, easy to understand information and diagrams to help repair and service the chainsaw. Service Information to help you to troubleshoot, repair and fix the Husqvarna 51 chainsaw. View pages online or download a complete PDF service manual that you can easily save, print or view on any device.

Husqvarna 51 Workshop Service Manual Contents

Contents, Introduction, Safety Regulations, Symbols, Technical data, Service tools, Service data, Safety equipment, Starter, Electrical system, Centrifugal clutch, Lubrication system, Carburetor, Tank unit, Anti-vibration system, Piston and cylinder, Crankcase and crankshaft, Troubleshooting, Repair Instructions.

Carburetor – General Chainsaw Adjustment

Adjusting the carburettor involves adjusting the engine to the local conditions e.g. climate, altitude, fuel and type of two-stroke oil. The carburettor is equipped with three adjustment options.
L = Low speed jet
H = High speed jet
T = Idling adjustment screw

The L and H jets adjust the fuel flow to match the airflow that the throttle valve opening allows. Turning them clockwise makes the fuel/air mixture weaker (less fuel in relation to the amount of air) and turning them anti-clockwise makes the fuel/air mixture richer. A weak mixture increases the engine speed and a rich mixture decreases the engine speed. The T screw controls the throttle position when idling. Turning the T screw clockwise gives faster idling; turning it anti-clockwise lowers idling speed (see manual for complete guide).

See the complete service workshop manual, carburetor manual, parts list, operator manual and technical supplements PDF downloads. Also the repair and service articles available on this website for more information on how to service, repair and find parts for the chainsaw.

Husqvarna 51 Chainsaw Specifications

YEAR INTRODUCED: 1990
ENGINE DISPLACEMENT: 51cc (3.1 cu. in.)
CYLINDER BORE: 45 mm (1.77 in.)
PISTON STROKE: 32 mm (1.26 in.)
CYLINDER TYPE: Aluminum with Chrome plated bore
H.P.: 3.1 hp (2.3kW)
WEIGHT: 5.2kg (11.4 lbs.) powerhead only
HANDLEBAR SYSTEM: Anti-vibration
CHAIN BRAKE: Inertia activated
CLUTCH: Centrifugal
CONSTRUCTION: Injection molded Polymer, die cast Magnesium
MAGNETO TYPE: Electronic Electrolux ET
CARBURETOR: Walbro WT-170 series or ZAMA C1Q-EL6, C1Q-EL7 (The carburetor model changed over the years)
STARTER TYPE: Automatic rewind
OIL PUMP: Automatic
MAXIMUM ENGINE RPM: 12,500 max free with bar and chain installed after break in, 9,000 under load.
IDLE RPM: 2,500
FLYWHEEL/COIL AIR GAP: 0.30 mm (0.012 in.)
SPARK PLUG TYPE: Bosch WSR7F/WS7F, NGK BPMR7A, Champion RCJ7Y
SPARK PLUG GAP: 0.50 mm (0.020 in.)
FUEL TANK CAPACITY: 600ml (20.2 fl. oz.)
FUEL OIL RATIO: 50:1
RECOMMENDED FUEL OCTANE: Regular grade
MIX OIL SPECIFICATION: Electrolux approved oil, Husqvarna mix oil
CHAIN PITCH: .325 in.
SHORTEST GUIDE BAR SUPPLIED: 33cm (13 in.)
LONGEST GUIDE BAR SUPPLIED: 51cm (20 in.)

Read the Husqvarna 51 Workshop Manual for more chainsaw specs.

The Husky 51 chainsaw was first released in 1990 and is a considered good saw with Husky owners. It shares many parts with the 50 and 55 chainsaw models, often you can use parts from these 3 machines interchangeably. It has a 2-Stroke 51cc engine, making it an efficient firewood cutter.

There were quite a few changes made to the 51 chainsaw during the years it was manufactured (like the carburetor had three different types fitted), and so sometimes you need to know the exact year in order to order any correct parts.

If you wanted to know what year your specific chainsaw was made, you can find out by looking at the serial number on the name identification place riveted to the saw.

The first number in the year in the 90s that it was assembled and the second number is the week.

The Husqvarna 51 is ideal for this type of work:

firewood processing
limbing
felling small trees
pruning branches

Features

• Chain brake for stopping blade rotation when triggered
• Throttle lock to reduce chainsaw injuries and accidents
• Automatic chain oiler
• Anti-vibration handle
• Good power to weight ratio
• Air injection filtration system
• Smart Start decompression valve for easier starting

Husqvarna 51 Workshop Manual PDF

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