The Husqvarna 450S is a reinforced, light chainsaw from the 400 series designed for felling, limbing and cutting firewood. It pairs a 2.4 kW X‑Torq® engine and a 50.2 cm³ displacement with user‑friendly features such as SmartStart, Air Injection and a captured bar nut to make starting, running and maintenance straightforward on site. Reliable, fuel‑efficient power The X‑Torq® engine delivers the 2.4 kW output needed for common forestry tasks while reducing fuel consumption and emissions compared with older two‑stroke designs. Easier starting and restart SmartStart, air purge and the auto return stop switch reduce effort at the starter and make subsequent starts quicker and more predictable. Lower maintenance time Quick‑release air filter, snap‑lock cylinder cover and Air Injection centrifugal cleaning minimise time spent on routine cleaning and filter servicing. Key specification Article ID 970702618 Power output 2.4 kW Cylinder displacement 50.2 cm³ Weight 5.0 kg Bar / blade / cutting length 45 cm Fuel tank 0.45 l Full specification Weight (excl. cutting equipment) 5.0 kg Product size height 29.3 cm Product size length 41.3 cm Product size width 22.5 cm Cylinder displacement (metric) 50.2 cm³ Output shaft power (metric) 2.4 kW Fuel tank volume (metric) 0.45 l Fuel Consumption 469 g/kWh Idling speed 2800 rpm Clutch engagement speed (±120) 4150 rpm Spark Plug Champion RCJ7Y, Husqvarna HQT-1R, NGK BPMR7A Exhaust emissions (CO₂ EU V) 718 g/kWh Sound pressure level at operators ear (LpA) 106 dB(A) Sound power level, guaranteed (LWA) 116 dB(A) Packaging length 493 mm Packaging width 278 mm Packaging height 334 mm WEEE Classified No Equivalent vibration level (ahv, eq) rear handle 4.1 m/s² Chain speed at max power (m/s) (metric) 18.5 m/s Power/fuel type Gasoline Recommended bar length, min (metric) 33 cm Recommended bar length, max (metric) 50 cm Equivalent vibration level (ahv, eq) front handle 3.9 m/s² Chain pitch .325″ Chain type SP33G Bar length (metric) 45 cm Bar length (inch) 18 in Spikes Mounted Nose type Sprocket nose Ignition module air gap (metric) 0.3 mm Cylinder stroke (metric) 33 mm Ignition module air gap (imperial) 0.01 in Cylinder stroke (imperial) 1.3 in Key features Quick-release air filter Facilitates cleaning and replacement of the air filter. Husqvarna patented hybrid crankcase Newly designed crankcase made of plastic and metal to provide increased robustness, performance and longevity Auto return stop switch When the stop switch has been used, it is automatically reset to facilitate the next start. Air Injection™ Centrifugal air cleaning system for reduced wear and longer operating time between filter cleanings. Powerful and Efficient X-TORQ® Engine Our X-TORQ® engines deliver great power and torque thanks to highly efficient combustion. Ergonomic rear handle Increased comfort with soft inlay, ergonomic trigger and assymetrical handle. Flip-Up Fuel Cap The flip-up fuel cap is easy to open and close when refueling, even if you are wearing thick gloves. Felling Marks Dedicated marks for increased felling precision Three-piece crankshaft Forged three-piece crankshaft for maximum durability for the toughest applications. Fuel Indicator Transparent fuel indicator makes it easy to check fuel level Snap-lock cylinder cover Snap-lock cylinder cover saves time when changing spark plugs and cleaning. LowVib® Effective anti-vibration dampeners absorb vibration, sparing the user’s arms and hands. Air Purge Air purge removes air from carburetor and fuel system for easy starting. Inertia chain brake Effective inertia-activated chain brake. Retained bar nut The retaining function prevents loosing the bar nut. Features Product video FAQs Will this fit my machine? Fitment can vary by model and deck size. Send us your mower model (and deck size if applicable) and we’ll confirm compatibility before you order. Do I need any extra brackets or fitting kits? Some accessories require a mounting kit or specific brackets depending on your machine. If you’re unsure, ask us and we’ll advise the correct setup. Can you fit it for me? Yes — if you’d like installation, let us know when ordering and we can arrange fitting (collection, workshop fit, or on-site depending on the product). What bar lengths can I fit to the 450S? The saw supports bars from 33 cm to 50 cm (recommended). It ships with a 45 cm (18 in) bar installed. Always check compatibility of chain pitch and sprocket when changing bar length. How easy is the 450S to start and maintain on site? Starting is simplified by SmartStart, air purge and an auto return stop switch. Routine maintenance is made quicker by the quick‑release air filter and snap‑lock cylinder cover. Follow the service intervals and procedures in the operator manual. Is this saw suitable for professional use? The 450S is designed to tackle forestry tasks such as felling, limbing and cutting firewood and features durable components (forged crankshaft, hybrid crankcase). For heavy continuous commercial use, follow a regular maintenance schedule and choose bar/chain combinations appropriate for the workload.
