JONSERED 621.


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