ECHO Gasoline Chain Saw – 20-Inch Bar, 50.2cc (3.5HP), Made in Japan - CS501SX

Heavy-Duty ECHO 20-Inch Chain Saw

The ECHO CS-501SX stands as the lightest commercial chainsaw in its class, perfectly balancing raw cutting power with structural agility. Driven by a 50.2cc Japanese 2-stroke engine, it produces an impressive 3.5 HP (2.57 kW) output. Combined with a 20-inch (50cm) guide bar, this tool aggressively slices through thick trunks and dense timber, making it the strategic choice for commercial forestry workers focused on heavy felling and rapid limbing operations.

Constructed to withstand rugged outdoor environments, the powerhead integrates a highly durable magnesium die-cast crankcase and a reinforced aluminum front handle. Despite this heavy-duty armor, the unit maintains a strict dry weight of a mere 4.7 kg. This superior power-to-weight ratio allows operators to maintain high productivity while drastically reducing arm and shoulder fatigue during extensive daily shifts.

Maintenance and usability are entirely optimized for the field. A built-in decompression valve significantly lowers starter rope resistance, ensuring effortless cold starts with minimal pulling effort. Additionally, the G-force air pre-cleaner extends filter life by ejecting dust before it enters the system. Paired with a tool-less air filter cover and a side-access chain tensioner, operators can make immediate on-site adjustments, maximizing continuous operational uptime.

Key Features & Benefits:

• Commercial-Grade Engine: Features a 50.2cc professional 2-stroke engine delivering 3.5 HP, providing exceptional cutting power and speed for demanding jobs.
• Unmatched Power-to-Weight Ratio: Delivers massive output while weighing only 4.7 kg (dry), making it exceptionally maneuverable and the lightest saw in its class.
• Magnesium Die-Cast Crankcase: Built for extreme durability, the slimline crankcase and rubber-gripped aluminum handle withstand the harshest forestry conditions.
• Effortless Decompression Starts: The decompression valve releases cylinder pressure during startup, heavily reducing pull resistance and minimizing wear on the recoil mechanism.
• G-Force Engine Air Pre-Cleaner: Centrifugal force spins out dust and debris before it reaches the filter, heavily reducing maintenance downtime.
• Side-Access Chain Tensioner: Allows operators to make quick, precise chain adjustments directly in the field without searching for specialized tools.
• Tool-Less Air Filter Access: Designed for instant access to the air filter even when wearing heavy gloves, facilitating easy daily field maintenance.
• See-Through Fuel Tank: Allows the operator to instantly check fuel levels at a single glance without needing to unscrew the cap.
• Dual-Post Inertia Chain Brake: An enhanced safety mechanism that automatically stops the chain instantly during sudden, unpredictable kickbacks.
• Fuel & Oil Mix: Requires a strict 50:1 ratio of unleaded gasoline to 2-stroke oil (Example: 100ml oil per 5L gasoline).