The Tanaka ECS-650 is a professional-grade 63 cc chainsaw introduced in the late 1980s by Japanese manufacturer Tanaka-Kogyo. Built with a magnesium crankcase, chrome-plated cylinder and high-quality internal components, it earned a reputation as a durable, smooth-running forestry saw.
Although later superseded by the ECS-655, the ECS-650 shares much of the same engineering and remains a sought-after vintage model among collectors and users who appreciate classic Japanese-built chainsaws.
Specfications
| Specification | Value |
|---|---|
| Manufacturer | Tanaka-Kogyo |
| Country of manufacture | Chiba, Japan |
| Model | ECS-650 |
| Product type | Professional petrol chainsaw |
| Production period | Late 1980s (predecessor to 1990 ECS-655)* |
| Engine type | Air-cooled, 2-stroke, single-cylinder |
| Displacement | 63 cc (3.84 cu in.) |
| Bore | 46 mm |
| Stroke | 38 mm |
| Cylinder | Aluminum with chrome-plated bore* |
| Intake system | Piston ported* |
| Power output | Approx. 4.0 hp (3.0 kW)* |
| Crankcase | Die-cast magnesium* |
| Crankshaft | Ball bearing supported* |
| Starter | Automatic rewind |
| Ignition | Electronic magneto |
| Carburetor | Walbro diaphragm carburetor* |
| Air filtration | Nylon mesh element* |
| Clutch | Centrifugal |
| Drive type | Direct |
| Chain brake | No (most ECS-650 models; inertia brake added on ECS-655)* |
| Anti-vibration system | Rubber anti-vibration mounts |
| Oil pump | Automatic, crankshaft-driven, fully adjustable |
| Fuel tank capacity | 600 ml (20.4 oz)* |
| Chain oil tank | Not published |
| Fuel/oil ratio | 50:1 (using modern 2-stroke oil)* |
| Dry weight | Approx. 6.8 kg (15.1 lb)* |
| Recommended bar lengths | 16 in (40 cm), 20 in (50 cm), 24 in (60 cm) |
| Chain pitch | 3/8 in |
| Chain gauge | .050 in (1.3 mm) |
| Standard chain series | Oregon 72 series |
| Bar mount | Large Tanaka mount |
| Color | Tanaka orange and black |
| Operator configuration | One-man |
| OEM bar options | 160PXDD176, 200PXDD176, 240RNDD176 |
| OEM chain options | 72SG060X, 72SG070X, 72SG081X |
| Owner’s manual | Shared with ECS-655 |
| Service manual | Shared platform with ECS-655 |
Notes:
- Figures marked with * are inferred from the factory ECS-650/ECS-655 shared owner’s manual or the nearly identical ECS-655, which shares the same chassis and engine architecture.
- The ECS-650 is generally regarded as the direct predecessor to the ECS-655, with the later model adding an inertia chain brake, updated anti-vibration system, and minor refinements while retaining the same 63 cc platform.
