MANUFACTURED BY: |  | ECHO (KIORITZ CORPORATION) |
 | | YOKOSUKA, MORIOKA Japan |
SERIES OR ASSEMBLY NUMBER: | | CS-290EVL, CS-290EVLP |
SERIAL NUMBER PREFIX: | | |
YEAR INTRODUCED: | | 1981 |
YEAR DISCONTINUED: | | 1989 |
ENGINE DISPLACEMENT: | | 27.9 cc (1.7 cu. in.) |
NUMBER OF CYLINDERS: | | Air cooled, two-stroke, single cylinder gasoline engine |
CYLINDER BORE: | | 35 mm (1.378 in.) |
PISTON STROKE: | | 29 mm (1.142 in.) |
PISTON RING THICKNESS: | | 1 ring |
CYLINDER TYPE: | | Aluminum with chrome plated bore |
INTAKE METHOD: | | Piston ported |
MANUFACTURER ADVERTISED H.P.: | | not advertised |
WEIGHT: | | 3.8 kg (8.4 lbs.) powerhead only |
OPERATOR CONFIGURATION: | | One Man operation |
HANDLEBAR SYSTEM: | | Anti-vibration |
CHAIN BRAKE: | | Mechanical |
CLUTCH: | | Centrifugal |
DRIVE TYPE: | | Direct |
CONSTRUCTION: | | Die cast magnesium |
MAGNETO TYPE: | | CDI Electronic |
CARBURETOR: | | ZAMA C1S-K1B |
MAJOR REPAIR KIT: | | RB-7 |
MINOR REPAIR KIT: | | GND-4 |
AIR FILTER SYSTEM: | | Cellulose fiber element |
STARTER TYPE: | | Automatic rewind |
OIL PUMP: | | Automatic, gear driven |
MAXIMUM ENGINE RPM: | | 10,500 TO 11,500 |
IDLE RPM: | | 2,800 TO 3,200 |
IGNITION TIMING: | | fixed at 30 degrees |
BREAKER POINT SETTING: | | none |
FLYWHEEL/COIL AIR GAP: | | 0.3 to 0.4 mm (0.012 to 0.016 in.) |
SPARK PLUG TYPE: | | Champion RCJ8, NGK BPM6A, or BPM6Y |
SPARK PLUG GAP: | | 0.63 mm (0.025 in.) |
CRANKSHAFT MAIN BEARINGS: | | Ball, 6201 |
FUEL TANK CAPACITY: | | 200 ml (6.8 oz.) |
FUEL OIL RATIO: | | 50:1 with ECHO oil |
RECOMMENDED FUEL OCTANE: | | 89 regular automotive.
ASPEN2 pre-mixed Alkylate fuel is
best at 93 octane, no ethanol, has very long shelf life |
MIX OIL SPECIFICATION: | | ECHO two cycle. ISO-L-EDG. Jaso M345/FC, FD
ASPEN Synthetic mix oil is best |
CHAIN PITCH: | | 1/4 in., later 3/8 in. low profile |
CHAIN TYPE: | | Oregon 25AP, 91SG |
BAR MOUNT PATTERN: | | 03 link |
SHORTEST GUIDE BAR SUPPLIED: | | 30 cm (12 in.) |
LONGEST GUIDE BAR SUPPLIED: | | 40 cm (16 in.) |
COLOUR SCHEME: | | Orange enamel |
PAINT CODES: | | |
ILLUSTRATED PARTS LIST: | | |
SERVICE MANUAL: | | |