MANUFACTURED BY: |  | JONSEREDS FABRIKERS AB |
 | | PARTILLE, SWEDEN |
SERIES OR ASSEMBLY NUMBER: | | |
SERIAL NUMBER PREFIX: | | |
YEAR INTRODUCED: | | 1987 |
YEAR DISCONTINUED: | | 1997 |
ENGINE DISPLACEMENT: | | 61.5 ccm (3.75 cu. in.) |
NUMBER OF CYLINDERS: | | 1 |
CYLINDER BORE: | | 48mm (1.89 in.) |
PISTON STROKE: | | 34mm (1.34 in.) |
PISTON RING THICKNESS: | | used 1 ring, 503-2890-15 |
CYLINDER TYPE: | | Aluminum with Chrome plated bore |
INTAKE METHOD: | | Piston ported |
MANUFACTURER ADVERTISED H.P.: | | 4.0 (2.9 kW) |
WEIGHT: | | 6.2 kg (13.6 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: | | Electronic |
CARBURETOR: | | Tillotson HS-237, or HS-251A series |
MAJOR REPAIR KIT: | | RK-23HS |
MINOR REPAIR KIT: | | DG-5HS/T |
AIR FILTER SYSTEM: | | Nylon mesh cartridge |
STARTER TYPE: | | Jonsered automatic rewind |
OIL PUMP: | | Automatic, worm gear driven |
MAXIMUM ENGINE RPM: | | |
IDLE RPM: | | 2,900 |
IGNITION TIMING: | | fixed |
BREAKER POINT SETTING: | | none |
FLYWHEEL/COIL AIR GAP: | | 0.3 to 0.4 mm (0.012 to 0.016 in.) |
SPARK PLUG TYPE: | | Bosch WS7F |
SPARK PLUG GAP: | | 0.5mm (0.020 in.) |
CRANKSHAFT MAIN BEARINGS: | | Ball |
FUEL TANK CAPACITY: | | 730 ml (24.6 fl. oz.) |
FUEL OIL RATIO: | | 50:1 |
RECOMMENDED FUEL OCTANE: | | Regular |
MIX OIL SPECIFICATION: | | Electrolux approved two-cycle chain saw mix oil |
CHAIN PITCH: | | 3/8 in. |
CHAIN TYPE: | | Oregon 73 |
BAR MOUNT PATTERN: | | 17 link |
SHORTEST GUIDE BAR SUPPLIED: | | 38 cm (15 in.) |
LONGEST GUIDE BAR SUPPLIED: | | 60 cm (24 in.) |
COLOUR SCHEME: | | Red and Black enamel |
PAINT CODES: | | |
ILLUSTRATED PARTS LIST: | | |
SERVICE MANUAL: | | |