Oleo-Mac GS 520 Petrol Chainsaw 51.7cc/18"

Special Price £612.99 (inc VAT) Regular Price £667.00 (inc VAT)

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The Oleo-Mac GS 520 petrol chainsaw is a powerful, lightweight cutter powered by Emak's own reliable 51.7cc engine, which delivers high torque even at low rpm.  The built-in decompressor, primer and semi-automatic choke combine to ensure easy starts every time, even from cold.

Featuring a 46cm/18" cutter bar, this robust petrol chainsaw is ideally suited to any kind of agricultural or estate use such as lopping, collecting firewood, felling and cutting up medium to large-sized trees.

The Oleo-Mac GS 520 is equipped with numerous safety features including anti kick-back protection and front hand guard.  The anti-vibration system fully isolates the handles from the engine reducing operator fatigue.

Maintenance of the Oleo-Mac GS 520 is simplified thanks to the filter and spark plug cover which can be opened without tools, the self-cleaning nylon filter and the side chain tensioner.

Solid and dependable, Oleo-Mac's range of Tough-Tech chainsaws is designed for heavy and frequent use, ensuring high work rates and maximum durability over time.

More Information
Brand Oleo-Mac
Engine Emak
Engine Type 2-stroke
Displacement 51.7cc
Power 2.5kW
Horsepower 3.4hp
Start Method Recoil
Decompression Valve Yes
Fuel Tank Capacity 0.5L
Guide Bar Length 46cm / 18" (sprocket nose)
Chain Pitch .325"
Chain Gauge .058"
Chain Tensioning Side tensioner
Automatic Chain Lubrication Yes
Oil Pump Automatic/adjustable/zero flow rate at idle speed
Oil Tank Capacity 0.27L
Vibration Level Data Lh: 5.2m/s² / Rh: 5.5m/s²
Sound and Noise Data Sound pressure: 104.4dB(A)
Power level: 112.9dB(A)
Weight excluding Bar & Chain 5.4kg
Warranty 3 years
Promotional Image /t/o/toughtech_1_5_1.jpg

Key Features

  • Environmentally-friendly engine
  • The primer aids starting even in the harshest climates
  • Semi-automatic choke; single lever controls both half-throttle and choke
  • Forged steel drive shaft reduces wear and promotes longer life
  • Nylon air filter improves performance and ensures trouble-free operation and easy maintenance
  • Maintenance is simplified by the filter/spark plug cover which can be opened without the need for tools


The compression ratio in the cylinder reduces when the starter is pushed in, allowing the engine to be started with less effort

Lateral Chain Tensioner

Lateral chain tensioner designed to enable quick tightening of the chain prior to use, along with an automatic oil pump which regulates oil flow for optimal performance



Solid and dependable, Tough-tech machines are designed for heavy and frequent use in countryside environments: clearing overgrown and uncultivated areas, pruning and cutting firewood, crop irrigation and disinfestation tasks. Designed adopting solutions certain to ensure high work rates and maximum durability over time.


Gardening, farming and forestry tools for home users and professionals. Oleo-Mac covers all shades of green.

With different models to meet each user’s needs but all sharing the same exceptional quality standards in terms of performance, reliability, comfort and safety. The accessories range is offered as an extension and completion of the product range. Ergonomics, quality and styling are essential ingredients of the development of Oleo-Mac’s products: primarily designed to meet the needs of professionals whilst also taking care of the requirements of less expert users who insist on the very best.

A truly comprehensive range of superb quality products at highly competitive prices – that’s the Oleo-Mac formula. 

The Italian Oleo-Mac brand is distributed by The Emak Group which is active in the development, production and worldwide sale of an extensive range of products for three business segments:

Outdoor Power Equipment 

  • Products for gardening, forestry and agriculture, including brushcutters, law mowers, garden tractors, chainsaws, rotary tillers and rotary cultivators.

Pumps and High Pressure Water Jetting 

  • Products for agriculture, including centrifugal and diaphragm pumps for crop spraying and weed control; 
  • Products for industry, including pumps for industrial applications and high and very-high pressure systems; 
  • Products for cleaning, namely professional and semi-professional high-pressure washers, floor scrubber-dryers and vacuum sweepers.

Components and Accessories

  • Products such as strimmer line and line heads for brushcutters, accessories for chainsaws, guns, valves and nozzles for high-pressure washers and for agricultural applications, plus precision farming products (sensors and computers).
A range of machines aimed at the home user, for tidying and cleaning the garden, cutting hedges and small trunks or stems, and DIY jobs in general. Characterized by lightweight and compact construction, to make the task of the operator that much simpler. Easy to start, easy to use, easy to maintain: these are the ideal tools for getting things done quickly and neatly around the home. Solid and dependable, these are machines designed for heavy and frequent use in countryside environments: clearing overgrown and uncultivated areas, pruning and cutting firewood, crop irrigation and disinfestation tasks. Designed adopting solutions certain to ensure high work rates and maximum durability over time. No-nonsense everyday tools for the busy professional, these are machines that stand out for the toughness of their components, their high performance and their matchless long-term durability. Specific materials used in construction guarantee unwavering quality even when tackling the most severe and lengthy of tasks, like forestry work and the clearance of uncultivated areas or scrub and undergrowth.




View Oleo-Mac brochure online

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Oleo-Mac GS 520 Petrol Chainsaw 51.7cc/18"
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