MANUFACTURED BY:JONSEREDS FABRIKERS ABPARTILLE, SWEDEN SERIES OR ASSEMBLY NUMBER:XN 621 YEAR INTRODUCED:1970 YEAR DISCONTINUED:1982 ENGINE DISPLACEMENT:56cc (3.4 cu. in.) NUMBER OF CYLINDERS:1 CYLINDER BORE:45mm PISTON STROKE:35mm CYLINDER TYPE:Aluminum with Nikasil coated bore INTAKE METHOD:Piston ported MANUFACTURER ADVERTISED H.P.:2.65kW @ 7700 rpm WEIGHT :6.3 kg (14 lbs.) powerhead only OPERATOR CONFIGURATION:One Man operation HANDLEBAR SYSTEM:Anti-vibration CHAIN BRAKE:none CLUTCH:Centrifugal DRIVE TYPE:Direct CONSTRUCTION:Die cast magnesium MAGNETO TYPE:Pagani CARBURETOR:Tillotson HS-21D series MAJOR REPAIR KIT:RK-23HS MINOR REPAIR KIT:DG5-HS/T AIR FILTER SYSTEM:Nylon mesh cylinder STARTER TYPE:Jonsereds automatic rewind OIL PUMP:Automatic, worm gear driven OPERATING RPM:10,300 IGNITION TIMING:2.7mm before TDC BREAKER POINT SETTING:0.3 to 0.4mm FLYWHEEL/COIL AIR GAP:0.30 mm (0.012 in.) SPARK PLUG TYPE:Champion CJ7Y SPARK PLUG GAP:0.5 to 0.6mm (0.020 to 0.024 in.) CRANKSHAFT MAIN BEARINGS:Ball FUEL TANK CAPACITY:1 litre FUEL OIL RATIO:25:1 RECOMMENDED FUEL OCTANE:Regular MIX OIL SPECIFICATION:Two-cycle chain saw mix oil CHAIN PITCH:3/8 in. CHAIN TYPE:Chisel BAR MOUNT PATTERN:18 link SHORTEST GUIDE BAR SUPPLIED:33cm (13 in.) LONGEST GUIDE BAR SUPPLIED:58cm (23 in.) COLOUR SCHEME:Red and Silver enamel
JONSERED 621 WITH BRAKE.
