MANUFACTURED BY: PARTNER AB MOLNDAL, SWEDEN SERIES OR ASSEMBLY NUMBER: YEAR INTRODUCED: 1967, June YEAR DISCONTINUED: ENGINE DISPLACEMENT: 55cc (3.36 cu. in.) NUMBER OF CYLINDERS: 1 CYLINDER BORE: 44mm (1.73 in.) PISTON STROKE: 36mm (1.42 in.) CYLINDER TYPE: Chrome plated aluminum INTAKE METHOD: Piston ported MANUFACTURER ADVERTISED H.P.: 2.4kW (3.2 hp) WEIGHT : 5.9kg (13 lbs.) powerhead only OPERATOR CONFIGURATION: One Man operation HANDLEBAR SYSTEM: Rigid CHAIN BRAKE: none CLUTCH: Centrifugal engages at 3,200 rpm DRIVE TYPE: Direct CONSTRUCTION: Die cast magnesium MAGNETO TYPE: Bosch CARBURETOR: Tillotson HS-137A series MAJOR REPAIR KIT: RK-23HS MINOR REPAIR KIT: DG-5HS/T AIR FILTER SYSTEM: Nylon mesh element STARTER TYPE: Partner automatic rewind OIL PUMP: Automatic, non-adjustable OPERATING RPM: 8,300 IGNITION TIMING: fixed BREAKER POINT SETTING: 0.45mm (0.018 in.) FLYWHEEL/COIL AIR GAP: fixed SPARK PLUG TYPE: Bosch WS5E or Champion CJ6 SPARK PLUG GAP: 0.5mm (.020 in.) CRANKSHAFT MAIN BEARINGS: Ball FUEL TANK CAPACITY: .75 litres (1.32 Imperial pints) FUEL OIL RATIO: 25:1 RECOMMENDED FUEL OCTANE: Regular MIX OIL SPECIFICATION: Mobiloil CHAIN PITCH: 9.5mm (.375 in.) CHAIN TYPE: Partner Chipper BAR MOUNT PATTERN: SHORTEST GUIDE BAR SUPPLIED: 33cm (13in.) LONGEST GUIDE BAR SUPPLIED: 56cm (22 in.) COLOUR SCHEME:Yellow and Black enamel