Husqvarna 445S 50.2cc Landowner Chainsaw – 18" Bar

The Husqvarna 445S is a versatile landowner chainsaw engineered to handle everything from felling and limbing trees to cutting firewood and maintaining wooded properties. Building on the proven 400 Series platform, the 445S combines a lightweight, reinforced design with a powerful 50.2cc X-Torq® engine to deliver dependable performance, improved fuel efficiency, and increased cutting productivity. With user-friendly features such as Smart Start®, an automatic oil pump, flip-up fuel cap, colored felling marks, and a captured bar nut, the 445S is designed to make demanding outdoor cutting tasks easier, faster, and more convenient.

Features

• 50.2cc X-Torq® Engine
  • Delivers approximately 3 HP of output shaft power for strong cutting performance.
  • X-Torq® technology is designed to provide excellent power while reducing fuel consumption and exhaust emissions.
  • Optimized engine performance makes the 445S well suited for firewood cutting, limbing, felling, and general property maintenance.
• 20% Faster Cutting
  • Improved cutting capacity compared with the previous Husqvarna 445 model.
  • Helps increase productivity by allowing users to complete cutting tasks more efficiently.
  • Ideal for landowners who regularly work with larger quantities of wood and timber.
• Smart Start® Technology
  • Designed to make starting the chainsaw quicker and easier.
  • Helps reduce starting resistance and minimizes the effort required to get the engine running.
  • Provides added convenience when repeatedly starting and stopping during property maintenance.
• Automatic Oil Pump
  • Automatically adjusts chain lubrication as needed.
  • Helps maintain proper bar and chain performance during operation.
  • Promotes smooth cutting and helps reduce unnecessary wear on the cutting equipment.
• Reinforced, Robust Construction
  • Built with durability in mind for demanding landowner applications.
  • The rugged design helps extend product life while maintaining a manageable overall weight.
  • Well suited for regular use around wooded properties, farms, homesteads, and rural acreage.
• Flip-Up Fuel Cap
  • Convenient flip-up design makes the fuel tank easy to open and secure.
  • Simplifies refueling and routine maintenance.
  • Designed for quick access while working in the field.
• Colored Felling Marks
  • Helps provide a clear visual reference when planning and making directional cuts.
  • Designed to improve cutting awareness and make tree-felling work more intuitive.
• Captured Bar Nut
  • Helps prevent the bar nut from becoming separated from the saw during maintenance.
  • Makes chain and bar adjustments more convenient.
• Low-Weight Design
  • Weighs approximately 11 lbs. excluding cutting equipment.
  • Provides a useful balance between power, maneuverability, and operator comfort.
  • Lightweight construction makes the saw easier to handle during extended cutting and limbing tasks.

Engine Specifications

• Engine Type: X-Torq® 2-stroke gasoline engine
• Cylinder Displacement: 50.2 cm³
• Output Shaft Power: 3 HP
• Maximum Torque: 2.6 Nm
• Maximum Torque RPM: 6,300 RPM
• Maximum Power Speed: 9,000 RPM
• Chain Speed at Maximum Power: 56.8 ft/s
• Clutch Engagement Speed: 4,150 RPM ±120
• Idle Speed: 2,800 RPM
• Ignition Module Air Gap: 0.01"
• Electrode Gap: 0.02"
• Fuel Type: Gasoline/oil 2-stroke mixture
• Recommended Fuel Mixture: Husqvarna 2-stroke oil or equivalent at 50:1
• Spark Plug: Husqvarna HQT-1R, Champion RCJ7Y, or NGK BPMR7A
• Oil Pump: Automatic

Cutting Equipment

• Standard Bar Length: 18"
• Recommended Bar Length: 13"–20"
• Bar Pitch: .325"
• Bar Gauge: .050"
• Chain Type: Husqvarna SP33G X-CUT
• Sprocket Type: Spur 7
• Standard Cutting Configuration: 18" .325" bar and chain
• Chain Speed at Maximum Power: 56.8 ft/s

Dimensions & Weight

• Weight Excluding Cutting Equipment: 11 lbs
• Compact design provides a practical combination of portability and cutting capability.
• Balanced construction helps improve handling when limbing, bucking, and performing general land-clearing work.

Lubrication

• Oil Tank Capacity: 0.55 US pint
• Oil Pump Type: Automatic
• Engine Lubricant: Husqvarna 2-stroke oil or equivalent at 50:1
• Automatic chain lubrication helps maintain consistent bar and chain performance while reducing unnecessary friction and wear.

Noise & Vibration

• Sound Pressure Level at Operator's Ear: 106 dB(A)
• Guaranteed Sound Power Level: 116 dB(A)
• Measured Sound Power Level: 114 dB(A)
• Equivalent Vibration Level, Rear Handle: 4.6 m/s²
• Equivalent Vibration Level, Front Handle: 4.7 m/s²

Emissions

• Exhaust Emissions CO₂ EU V: 718 g/kWh
• CO₂ measurement is based on laboratory testing over a fixed test cycle and represents the engine type or engine family rather than a guarantee of emissions from an individual machine.

Ideal Applications

• Firewood cutting
• Tree felling
• Tree limbing
• Bucking logs
• Land clearing
• Property maintenance
• Farm and homestead use
• Rural acreage maintenance
• General forestry and landowner tasks

Why Choose the Husqvarna 445S?

The Husqvarna 445S provides landowners with an excellent combination of power, maneuverability, durability, and ease of operation. Its 50.2cc X-Torq® engine provides the muscle needed for demanding cutting tasks, while the lightweight design and Smart Start® system make the saw easier to manage throughout the workday. With an 18" cutting setup, automatic chain lubrication, improved cutting capacity, and a rugged reinforced design, the 445S is a dependable choice for homeowners, farmers, acreage owners, and anyone who regularly works with firewood or timber.

Model: 445S
Engine: 50.2cc X-Torq® 2-Stroke
Power: 3 HP
Bar Length: 18"
Chain: SP33G .325" Pitch, .050" Gauge
Weight: 11 lbs. Excluding Cutting Equipment