Model: 4MG CHAIN SAW MANUFACTURED BY: MALL TOOL COMPANY CHICAGO, ILLINOIS, U.S.A. CRETE, ILLINOIS, U.S.A. TORONTO, ONTARIO, CANADA GUELPH, ONTARIO, CANADA SERIES OR ASSEMBLY NUMBER: 43660A YEAR INTRODUCED: 1955 YEAR DISCONTINUED: 1957 ENGINE DISPLACEMENT: 6.45 cu. in. (105cc) NUMBER OF CYLINDERS: 1 CYLINDER BORE: 2.25in. (57mm) PISTON STROKE: 1.625 in. (41mm) CYLINDER TYPE: Chrome Plated Aluminum INTAKE METHOD: Reed Valve MANUFACTURER ADVERTISED H.P.: 5.5 Brake Horsepower WEIGHT : OPERATOR CONFIGURATION: One Man HANDLEBAR SYSTEM: Rigid CHAIN BRAKE: none CLUTCH: 2 Shoe Centrifugal Fairbanks Morse DRIVE TYPE: Direct CONSTRUCTION: Die Cast Magnesium Castings MAGNETO TYPE: Bendix Scintilla CARBURETOR: Tillotson HP Diaphragm type MAJOR REPAIR KIT: nla MINOR REPAIR KIT: nla AIR FILTER SYSTEM: Skinner Ribbon Element STARTER TYPE: Mall Design Automatic Rewind OIL PUMP: Manual, built into clutch cover OPERATING RPM: 5,000 IGNITION TIMING: 30 Degrees B.T.D.C. BREAKER POINT SETTING: 0.018" to 0.020" (0.45 to 0.51 mm) FLYWHEEL/COIL AIR GAP: Position fixed SPARK PLUG TYPE: Champion J6J SPARK PLUG GAP: 0.025 in. (0.63mm) CRANKSHAFT MAIN BEARINGS: Ball and Roller type FUEL TANK CAPACITY: 1 U.S. quart FUEL OIL RATIO: 1/2 Pint to 1 Gallon (U.S.) RECOMMENDED FUEL OCTANE: 72 to 84 Octane Regular Grade MIX OIL SPECIFICATION: SAW 30 Non Detergent or MALL Oil # 48411 CHAIN PITCH: 9/16 in. (14mm) CHAIN TYPE: Mall Chrome Plated Side Planer BAR MOUNT PATTERN: SHORTEST GUIDE BAR SUPPLIED: 15 in. (38cm) LONGEST GUIDE BAR SUPPLIED: 24 in. (61 cm) COLOUR SCHEME: MALL Red