Husqvarna 445 Workshop Manual


Husqvarna 445 Workshop Manual for the service and repair of the Husqvarna 445 chainsaw. View pages online or download a complete PDF manual with clear easy to understand images, diagrams and information. Print or save to any device.


Husqvarna 445 Workshop Manual Repair

Husqvarna 445 Workshop Manual for the Repair and service of the Husqvarna 445 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 445 chainsaw. View pages online or download a complete PDF service manual that you can easily save, print or view on any device.

Husqvarna 445 Workshop 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 445 Chainsaw Specifications


Power output 2.1 kW
Cylinder displacement 50.2 cm³
Maximum power speed 9,000 rpm
Idling speed 2,700 rpm
Clutch engagement speed (±120) 4,300 rpm
Fuel consumption 481 g/kWh
Fuel consumption 0.98 kg/h
Electrode gap 0.5 mm
Ignition module air gap 0.3 mm


Bar length (inch) 18 in
Recommended bar length, min 33 cm
Recommended bar length, max 50 cm
Chain type H30
Gauge 1.3 mm
Pitch .325″


Weight (excl. cutting equipment) 5.1 kg


Oil tank volume 0.55 US pint
Oil tank volume 0.26 l

Sound and Noise

Sound power level, guaranteed (LWA) 114 dB(A)
Sound power level, measured 112 dB(A)
Sound pressure level at operators ear 103 dB(A)

Read the Husqvarna 445 Workshop Manual for more chainsaw specs.

The 445 has a 45.7 cc 2-stroke engine capable of generating 2.8 horsepower. The maximum speed of the saw is 9,000 RPM.

The Husky 445 first generation chainsaw. Ideal for chainsaw for homeowners who cut down softwood trees, trim or remove trees in their yards. Husqvarna 445 has enough power for light and medium cutting of softwood. That makes it a good choice for any homeowner or farmer who does just that. Anything more complicated than that, like cutting hardwood or felling is a problem. Professionals need more power than its 47.5 cc engine can offer.

Pros & Cons

  • Reliable and efficient engine
  • Solid build and great design
  • Easy to start and use
  • Lightweight
  • Underpowered, especially for hardwoods
  • Non-adjustable oil release system
  • Chain is temperamental

Cutting equipment

The 445 comes with an 18” (45 cm) guide bar with a nose sprocket. Regular greasing of the nose sprocket prevents the wheel from seizing or failing to operate properly. The chain has a 0.325” pitch, a 0.05” gauge, and 72 drive links.

The 445 is compatible with different sized guide bars, and the supported lengths range from 13” (33 cm) to 20” (50 cm). You can pick the most suitable one for you, depending on your cutting needs. The chainsaw is most fitting to the use of 16” or 18” bars.


3-Piece crankshaft

The crankshaft has three separate parts for maximized durability. This helps the saw work through the most challenging tasks.

Air Injection

Cutting wood is messy and produces a ton of dust. It can clog the air filter fast. The centrifugal air cleaning system prevents large debris particles from reaching the filter. In return, you get increased longevity and less maintenance. This is one of the features I like most.

Automatic oil release system

The 445 comes with an automatic oil release system, which means you don’t have to do it manually. But, it’s a fixed flow system, so you can’t adjust the flow of oil. That would be useful when you need to adapt to different cutting conditions.

Ease of use


Husqvarna’s Smart Start system makes this chainsaw easy to start.

Combined start and stop switch as well as a fuel pump, make the saw easy to start. It also reduces the risk of engine flooding. The starter and engine start swiftly with minimum effort.



The X-Torq engine reduces emission levels and it increases fuel efficiency as well. The increased fuel efficiency means more cutting and lesser refuel breaks.

Husqvarna 445 Workshop Manual PDF

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