Husqvarna 51 Specifications

Husqvarna 51 Specifications

The Husqvarna 51 chainsaw was introduced in 1990 by Husqvarna Vapenfabriks AB, a Swedish company renowned for its quality outdoor power equipment. This chainsaw had a powerful engine displacement of 51cc (3.1 cu. in.), and its cylinder bore was 45mm (1.77 in.), with a piston stroke of 32mm (1.26 in.). The chainsaw had a sturdy construction, with an injection-molded polymer and die-cast magnesium frame.

The Husqvarna 51 also featured an anti-vibration handlebar system, an inertia-activated chain brake, and an automatic oil pump. It had a recommended fuel-oil ratio of 50:1 and could be used with regular-grade fuel. With its lightweight design of only 5.2 kg (11.4 lbs.), this chainsaw was ideal for both professional and domestic use.

The Husqvarna 51 had a maximum engine RPM of 12,500 and was capable of delivering a manufacturer-advertised horsepower of 3.1 hp (2.3 kW). It was available with guide bar lengths ranging from 33cm (13 in.) to 51cm (20 in.).

Specifications Chart

Manufactured byHusqvarna Vapenfabriks AB, Sweden
Year introduced1990
Engine displacement51cc (3.1 cu. in.)
Cylinder bore45 mm (1.77 in.)
Piston stroke32 mm (1.26 in.)
Cylinder typeAluminum with Chrome plated bore
Intake methodPiston ported
Manufacturer advertised horsepower3.1 hp (2.3kW)
Weight5.2kg (11.4 lbs.) powerhead only
Handlebar systemAnti-vibration
Chain brakeInertia activated
Drive TypeDirect
ConstructionInjection molded Polymer, die-cast Magnesium
Magneto typeElectronic Electrolux ET
CarburetorWalbro WT-170 series, ZAMA C1Q-EL6, C1Q-EL7
Major repair kitK20-WAT for Walbro
RB-45 for ZAMA
Minor repair kitD10-WAT for Walbro, GND-33 for ZAMA
Air filter systemNylon mesh cartridge
Starter typeAutomatic rewind
Oil pumpAutomatic
Maximum engine RPM12,500 max free with bar and chain installed
RPMafter break-in, 9,000 under load.
Idle RPM2,500
Ignition timingFixed
Breaker point settingNone
Flywheel/coil air gap0.30 mm (0.012 in.)
Spark plug typeBosch WSR7F/WS7F, NGK BPMR7A, Champion RCJ7Y
Spark plug gap0.50 mm (0.020 in.)
Crankshaft main bearingsBall
Fuel tank capacity600ml (20.2 fl. oz.)
Fuel oil ratio50:1
Recommended fuel octaneRegular grade
Mix oil specificationElectrolux approved oil, Husqvarna mix oil
Chain pitch.325 in.
Chain typeN/A
Bar mount pattern01 link
Shortest guide bar supplied33cm (13 in.)
Longest guide bar supplied51cm (20 in.)
Color schemeHusqvarna Orange
Illustrated parts listYes
Service manualYes
Husqvarna 51 Chainsaw Specs

In conclusion, the Husqvarna 51 chainsaw was a popular model introduced in 1990 and manufactured by Husqvarna Vapenfabriks AB in Sweden. This chainsaw had a powerful 51cc engine with a 45mm cylinder bore and a 32mm piston stroke. It had an injection-molded polymer and die-cast magnesium construction, making it both lightweight and durable.

The chainsaw had an automatic oil pump, an anti-vibration handlebar system, and an inertia-activated chain brake for improved safety. The Husqvarna 51 also had fixed ignition timing, a maximum engine RPM of 12,500, and a fuel tank capacity of 600ml. The chainsaw was designed for professional use and came with an illustrated parts list and service manual for easy repairs and maintenance.

Although it has been discontinued, the Husqvarna 51 chainsaw remains a reliable and powerful tool for both professionals and homeowners alike.

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