Echo CS-702 Specifications

Echo CS-702 Specifications

The Echo CS-702 is a classic chainsaw model that has been a reliable workhorse for loggers and homeowners since its introduction in 1975. This two-stroke gasoline engine chainsaw features a powerful 70.7cc engine with a chrome-plated aluminum cylinder bore and piston ported intake method. Its centrifugal clutch and direct drive type provide excellent cutting performance, and the anti-vibration handlebar system makes it comfortable to use for extended periods.

The CS-702 also features a mechanical chain brake, automatic oil pump, and automatic rewind starter, making it a versatile and easy-to-use tool for any cutting task.


Series or Assembly NumberCS-702, CS-702VL, CS-702EVL
Year Introduced1975
Year DiscontinuedN/A
Engine Displacement4.32 cu. in. (70.7 cc)
Number of CylindersAir cooled, two-stroke, single cylinder gasoline engine
Cylinder Bore1.97 in. (50 mm)
Piston Stroke1.42 in. (36 mm)
Piston Ring Thickness2 rings used
Cylinder TypeAluminum with chrome plated bore
Intake MethodPiston ported
Manufacturer Advertised H.P.N/A
Weight16.5 lbs. (7.5 kg) powerhead only
Handlebar SystemAnti-vibration
Chain BrakeMechanical
ClutchCentrifugal, 3 metal shoes
Drive TypeDirect
ConstructionDie cast Magnesium
Magneto TypeFlywheel magneto with breaker points
CarburetorTillotson HS-166A
Major Repair KitRK-23HS
Minor Repair KitDG-5HS/T
Air Filter SystemNylon mesh element
Starter TypeAutomatic rewind
Oil PumpAutomatic
Maximum Engine RPMN/A
Ignition Timing30 degrees before TDC
Breaker Point Setting0.012 to 0.016 in. (0.30 to 0.40 mm)
Flywheel/Coil Air Gap0.012 to 0.016 in. (0.30 to 0.40 mm)
Spark Plug TypeNGK BPM7A
Spark Plug Gap0.025 in. (0.61 to 0.71 mm)
Crankshaft Main BearingsBall
Fuel Tank Capacity25 fl. oz. (750 ml)
Fuel Oil Ratio50:1 with ECHO oil, otherwise 32:1
Recommended Fuel Octane89 regular automotive.
Aspen2 pre-mixed Alkylate fuelBest at 93 octane, no ethanol
Mix Oil SpecificationECHO two cycle
Aspen Synthetic mix oilBest
Chain Pitch3/8 in.
Chain TypeOregon 72LP
Bar Mount Pattern10 link
Shortest Guide Bar Supplied16 in. (40 cm)
Longest Guide Bar Supplied24 in. (60 cm)
Color SchemeECHO Orange enamel with Black trim
Echo CS-702 Chainsaw Original Specs


  • Manufactured by Echo (Kioritz Corporation) in Yokosuka, Morioka, Japan
  • Introduced in 1975
  • Air-cooled engine with a piston-port intake method and an aluminum cylinder with chrome-plated bore
  • Equipped with a centrifugal clutch with three metal shoes and direct drive
  • Die-cast magnesium construction for durability
  • Anti-vibration handlebar system for comfortable operation
  • Mechanical chain brake for safety
  • Automatic oil pump and nylon mesh air filter system
  • Flywheel magneto with breaker points for ignition
  • Equipped with a Tillotson HS-166A carburetor and NGK BPM7A spark plug
  • The shortest guide bar supplied is 40 cm (16 in.), and the longest is 60 cm (24 in.)
  • Echo orange enamel with black trim color scheme

Different Models

The Echo CS-702, CS-702VL, and CS-702EVL are three models of chainsaws from the same series. Here are the key differences between them:

  • The CS-702 is the basic model and was the first to be introduced in 1975.
  • The CS-702VL was introduced later and featured a different type of air filter, the “Ventilated Large” air filter system, which was designed to help the engine run cooler.
  • The CS-702EVL was a later version that added an electronic ignition system, which replaced the flywheel magneto with breaker points. This electronic ignition system helped improve the saw’s starting ability and also helped with fuel efficiency.

Other than these differences, the three models are very similar in terms of their specifications and features.


To sum up, the Echo CS-702 chainsaw is a reliable and powerful tool that has stood the test of time. With its durable construction, efficient engine, and user-friendly features, the CS-702 is a favorite among loggers and homeowners for a reason. Echo’s commitment to quality and innovation has made them a trusted brand in the chainsaw industry, and the CS-702 is a testament to their dedication to producing high-performing and long-lasting tools.

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