Oleo-Mac GS 451 Petrol Chainsaw 43cc/16"

Special Price £485.99 (inc VAT) Regular Price £529.00 (inc VAT)

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Product Code
GS451 - 16

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Delivery Time: Usually 1-2 working days
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The Oleo-Mac GS 451 petrol chainsaw has been specifically designed to satisfy a wide range of users, from demanding home gardeners requiring a tool for frequent use, to farmers and professional contractors.

This is a powerful, lightweight chainsaw powered by Emak's reliable 42.9cc engine, which delivers high torque even at low rpm. The advanced petrol chainsaw complies with Euro 2 emission standards with reduced emissions, lower fuel consumption and lower noise compared to the previous version. The “EasyOn” starting system ensures any user can set the machine running simply and effortlessly, with a minimal number of pulls on the cord. The “primer” facilitates starting even in the harshest climates.

Equipped with an Oregon 40cm (16") guide bar and microlite .325" chain, its compactness, versatility and good power-to-weight ratio ensure excellent cutting performance for any use from limbing and pruning to cutting medium-sized trunks. A fully adjustable automatic oil pump cuts down on chain oil consumption and reduces the impact on the environment.

The Oleo-Mac GS 451 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.

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.

This model is also available with 46cm/18" bar.

More Information
Brand Oleo-Mac
Engine Emak
Engine Type Petrol, 2-stroke
Displacement 42.9cc
Power 2.1kW
Horsepower 2.9hp
Start Method Recoil
Start Assist System EasyOn
Decompression Valve No
Fuel Tank Capacity .32L
Bar and Chain Oregon / Oregon microlite
Guide Bar Length 40cm / 16"
Chain Pitch 0.325"
Chain Gauge 0.050"
Chain Tensioning Side tensioner
Automatic Chain Lubrication Yes
Oil Pump Automatic/adjustable/zero flow rate at idle speed
Oil Tank Capacity .22L
Vibration Level Data Lh: 4/3m/s² / Rh: 4.8m/s²
Sound and Noise Data Sound pressure: 103dB(A)
Power level: 114dB(A)
Weight excluding Bar & Chain 4.5kg
Warranty 3 years
Promotional Image /t/o/toughtech_1_2_2_1.jpg

Key Features

  • Environmentally-friendly engine
  • Automatic oil pump, of aluminium construction, ensures zero flow at idling speed, and outstanding long term durability
  • Electronically-controlled digital coil reduces starting effort and favours lower fuel consumption
  • 2-ring piston, nickel cylinder, forged steel connecting rod and crankshaft: efficiency guaranteed constant over time
  • Equipped with numerous devices to simplify maintenance operations, such as the inspectable muffler or no-tools filter cover
  • Ideal for intensive home use


User-friendly starting system ensures a smooth pick-up of the engine with no kickback, and limits the number of pulls required.

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 451 Petrol Chainsaw 43cc/16"
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