MANUFACTURED BY: DISSTON HENRY & SONS INC. PHILADELPHIA, PENNSYLVANIA, U.S.A. SERIES OR ASSEMBLY NUMBER: YEAR INTRODUCED: 1948 YEAR DISCONTINUED: 1949 ENGINE DISPLACEMENT: 5.5 cu. in. (90cc) NUMBER OF CYLINDERS: 1 CYLINDER BORE: 2.00 in. (50.8mm) PISTON STROKE: 1.750 in. (44.5mm) CYLINDER TYPE: INTAKE METHOD: Reed valve MANUFACTURER ADVERTISED H.P.: 3.5 WEIGHT : OPERATOR CONFIGURATION: One Man operation HANDLEBAR SYSTEM: Rigid CHAIN BRAKE: none CLUTCH: Manual, controller from rear handle DRIVE TYPE: Gear reduction CONSTRUCTION: Die cast aluminum MAGNETO TYPE: Bendix Scintilla CARBURETOR: Mercury fuel meter MAJOR REPAIR KIT: nla MINOR REPAIR KIT: nla AIR FILTER SYSTEM: Skinner ribbon element STARTER TYPE: Mercury "Magnapull" automatic rewind OIL PUMP: Automatic pressure feed OPERATING RPM: 4,000 IGNITION TIMING: 26 degrees before TDC BREAKER POINT SETTING: .020 in. (0.51mm) FLYWHEEL/COIL AIR GAP: SPARK PLUG TYPE: Champion J-7-J SPARK PLUG GAP: .025 in. (0.63mm) CRANKSHAFT MAIN BEARINGS: Ball FUEL TANK CAPACITY: 3.5 pints U.S. measure (1656ml) FUEL OIL RATIO: 16:1 RECOMMENDED FUEL OCTANE: Regular 72 minimum MIX OIL SPECIFICATION: SAE 30 CHAIN PITCH: CHAIN TYPE: Disston Full Interlock Straddle Type (scratcher) Disston Chisel type Full Interlock Straddle Type BAR MOUNT PATTERN: SHORTEST GUIDE BAR SUPPLIED: 18 in. (45cm) LONGEST GUIDE BAR SUPPLIED: 30 in. (76cm) COLOUR SCHEME: Disston Orange enamel