MANUFACTURED BY: |  | JO-BU A/S MEKANISKE VERKSTED |
 |  | DROBAK, NORWAY |
SERIES OR ASSEMBLY NUMBER: |  | |
SERIAL NUMBER PREFIX: |  | |
YEAR INTRODUCED: |  | 1975 |
YEAR DISCONTINUED: |  | |
ENGINE DISPLACEMENT: |  | 34.4 cc (2.1 cu. in.) |
NUMBER OF CYLINDERS: |  | 1 |
CYLINDER BORE: |  | 36.5 mm (1.4375 in.) |
PISTON STROKE: |  | 32.5 mm (1.281 in.) |
PISTON RING THICKNESS: |  | |
CYLINDER TYPE: |  | Aluminum with chrome plated bore |
INTAKE METHOD: |  | Piston ported |
MANUFACTURER ADVERTISED H.P.: |  | Not advertised |
WEIGHT: |  | |
OPERATOR CONFIGURATION: |  | One Man operation |
HANDLEBAR SYSTEM: |  | Anti-Vibration |
CHAIN BRAKE: |  | none |
CLUTCH: |  | Centrifugal |
DRIVE TYPE: |  | Direct |
CONSTRUCTION: |  | Die cast magnesium |
MAGNETO TYPE: |  | Phelon |
CARBURETOR: |  | Tillotson HU-18C
Walbro WA |
MAJOR REPAIR KIT: |  | RK-14HU for Tillotson
K10-WAT for Walbro |
MINOR REPAIR KIT: |  | DG-2HU for Tillotson
D10-WAT for Walbro |
AIR FILTER SYSTEM: |  | Cellulose fiber element |
STARTER TYPE: |  | Automatic rewind |
OIL PUMP: |  | Automatic with manual override |
MAXIMUM ENGINE RPM: |  | 6,500 |
IDLE RPM: |  | |
IGNITION TIMING: |  | 25 degrees before TDC |
BREAKER POINT SETTING: |  | 0.38 mm (0.015 in.) |
FLYWHEEL/COIL AIR GAP: |  | 0.4 mm (0.016 in.) |
SPARK PLUG TYPE: |  | Champion CJ-6 |
SPARK PLUG GAP: |  | 0.63 mm (0.025 in.) |
CRANKSHAFT MAIN BEARINGS: |  | Caged needle roller |
FUEL TANK CAPACITY: |  | 300 ml |
FUEL OIL RATIO: |  | 20:1 |
RECOMMENDED FUEL OCTANE: |  | Regular grade |
MIX OIL SPECIFICATION: |  | Two-cycle chain saw mix oil |
CHAIN PITCH: |  | 1/4" |
CHAIN TYPE: |  | Oregon 25C |
BAR MOUNT PATTERN: |  | 02 link |
SHORTEST GUIDE BAR SUPPLIED: |  | 30 cm (12 in.) |
LONGEST GUIDE BAR SUPPLIED: |  | 40 cm (16 in.) |
COLOUR SCHEME: |  | Orange |
PAINT CODES: |  | |
ILLUSTRATED PARTS LIST: |  |  |
SERVICE MANUAL: |  |  |