MANUFACTURED BY: |  | ECHO (KIORITZ CORPORATION) |
 | | YOKOSUKA, MORIOKA Japan |
SERIES OR ASSEMBLY NUMBER: | | CS-550EVL, CS-550EVLP |
SERIAL NUMBER PREFIX: | | |
YEAR INTRODUCED: | | 1983 |
YEAR DISCONTINUED: | | 1990 |
ENGINE DISPLACEMENT: | | 54.7 ccm (3.34 cu. in.) |
NUMBER OF CYLINDERS: | | Air cooled, two-stroke, single cylinder gasoline engine |
CYLINDER BORE: | | 44 mm (1.65 in.) |
PISTON STROKE: | | 36 mm (1.42 in.) |
PISTON RING THICKNESS: | | 2 rings used |
CYLINDER TYPE: | | Aluminum with CHROME plated bore |
INTAKE METHOD: | | Piston ported |
MANUFACTURER ADVERTISED H.P.: | | not advertised |
WEIGHT: | | 6 kg (13.1 lbs.) powerhead only |
OPERATOR CONFIGURATION: | | One Man operation |
HANDLEBAR SYSTEM: | | Anti-vibration |
CHAIN BRAKE: | | Mechanical |
CLUTCH: | | Centrifugal, 3 metal shoes |
DRIVE TYPE: | | Direct |
CONSTRUCTION: | | Die cast MAGNESIUM, injection molded Polymer |
MAGNETO TYPE: | | Electronic CD type |
CARBURETOR: | | Walbro HDA |
MAJOR REPAIR KIT: | | K10-HDA |
MINOR REPAIR KIT: | | D10-HDA |
AIR FILTER SYSTEM: | | Nylon mesh cartridge |
STARTER TYPE: | | Automatic rewind. Replacement cord 4X950 mm |
OIL PUMP: | | Automatic, worm gear driven |
MAXIMUM ENGINE RPM: | | 11,000 to 12,000, operating range 5,500 to 9,000 |
IDLE RPM: | | 2,200 to 2,800 |
IGNITION TIMING: | | fixed |
BREAKER POINT SETTING: | | none |
FLYWHEEL/COIL AIR GAP: | | 0.4 mm (0.016 in.) |
SPARK PLUG TYPE: | | Champion CJ7Y, NGK BPM7A |
SPARK PLUG GAP: | | 0.63 mm (0.025 in. |
CRANKSHAFT MAIN BEARINGS: | | Ball, 6202 |
FUEL TANK CAPACITY: | | 500 ML (16.9 fl. oz.) |
FUEL OIL RATIO: | | 50:1 with ECHO oil, otherwise 32:1 |
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/FD
ASPEN Synthetic mix oil is best |
CHAIN PITCH: | | 3/8 in., 0.050 gauge |
CHAIN TYPE: | | Carlton A1LM or A1EP |
BAR MOUNT PATTERN: | | 10 link |
SHORTEST GUIDE BAR SUPPLIED: | | 40 cm (16 in.) |
LONGEST GUIDE BAR SUPPLIED: | | 61 cm (24 in.) |
COLOUR SCHEME: | | Orange with black air filter cover |
PAINT CODES: | | |
ILLUSTRATED PARTS LIST: | | |
SERVICE MANUAL: | | |