MANUFACTURED BY: PIONEER SAWS LTD. PETERBOROUGH, ONTARIO, CANADA SERIES OR ASSEMBLY NUMBER: YEAR INTRODUCED: 1979 YEAR DISCONTINUED: 1982 ENGINE DISPLACEMENT: 3.97 cu. in. (66cc) NUMBER OF CYLINDERS: 1 CYLINDER BORE: 1.875 in. (47.6mm) PISTON STROKE: 1.437 in. (36.5mm) CYLINDER TYPE: Chrome plated aluminum INTAKE METHOD: Reed valve MANUFACTURER ADVERTISED H.P.: not advertised WEIGHT : 16 lbs. (7.3kg) powerhead only OPERATOR CONFIGURATION: One Man operation HANDLEBAR SYSTEM: Anti-vibration CHAIN BRAKE: none on early models, mechanical brake introduced on later models CLUTCH: Centrifugal DRIVE TYPE: Direct CONSTRUCTION: Die cast magnesium MAGNETO TYPE: Prestolite electronic system (blue coloured module) CARBURETOR: Tillotson HS-147D series Walbro SDC-79A MAJOR REPAIR KIT: Tillotson RK-23HS Walbro K10-SDC MINOR REPAIR KIT: Tillotson DG-4HS/T Walbro D10-SDC AIR FILTER SYSTEM: Nylon mesh element STARTER TYPE: Pioneer pinion type automatic rewind with compression release interconnected OIL PUMP: Automatic, adjustable OPERATING RPM: 9,000 IGNITION TIMING: fixed BREAKER POINT SETTING: none FLYWHEEL/COIL AIR GAP: .025 to .030 in. (0.63 to 0.76 mm) SPARK PLUG TYPE: Champion KCJ7Y SPARK PLUG GAP: .030 in. CRANKSHAFT MAIN BEARINGS: Ball FUEL TANK CAPACITY: 26 fl. oz. (770ml) FUEL OIL RATIO: 24:1 RECOMMENDED FUEL OCTANE: Regular MIX OIL SPECIFICATION: Pioneer Oil CHAIN PITCH: 3/8" CHAIN TYPE: PioneerC3 BAR MOUNT PATTERN: SHORTEST GUIDE BAR SUPPLIED: 16 in. (40cm) LONGEST GUIDE BAR SUPPLIED: 28 in. (61cm) COLOUR SCHEME: Orange, Black and Silver enamel