Light-weight professional petrol chain saw, ideal for all-round use.


Incredible power to weight ratio with the robust build standards ECHO is famous for.

Professional engine

Professional engine

Featuring a 40.2 cc professional grade engine, giving exceptional power and performance.

Compact, ergonomic design

Compact, ergonomic design

ECHO chain saws are all designed to the same professional standard, with no exceptions. Hard working, high quality with renowned Japanese build standards.

Bar and chain

Bar and chain

With a 43cm (17″) guide bar, the CS-420ES is a mid-range, low emission chainsaw that could be used by tree surgeons or farmers for felling trees and logging.

Best Features.

Power to weight ratio

Super light-weight design with exceptional power.


Designed to maximise efficiency and comfort.

Easy start engine

ECHO’s patented system for effortless starting.

Product Details.

Dry Weight (kg) 4.6
Chain Oil Tank Capacity 0.28
Chain Brake Inertia
Engine displacement (cm³) 40.2
Fuel Consumption At Maximum Engine Power (L/h) 0.95
Guide Bar Gauge (inch) 0.058
Output (ps) 2.2
Priming Pump Yes
Choke w/ Automatic Fast Idle Release Yes
Output (kw) 1.6
Ignition System CDI
Chain Tensioner Side
Fuel tank capacity 0.41
Start Assist System ES-start
Saw Chain Pitch (inch) 0.325
Applicable Bar Length (cm/inch) 38, 45 / 15, 18
Vibration Front handle/Rear handle (m/s²) 4.4 / 6.4
Sound pressure level (dB(A)) 99.2
Sound power level (dB(A)) 110.0
CO2 (g/kW・h) 1 958

1 This CO₂ measurement results from testing a (parent) engine representative of the engine type (engine family) over a fixed test cycle under laboratory conditions and does not imply or express any guarantee of the performance of a particular engine.

Other Features.