MANUFACTURED BY: MONO MANUFACTURING CO. SPRINGFIELD, MISSOURI, U.S.A. YEAR INTRODUCED: 1958 ENGINE DISPLACEMENT: 4.7 cu. in. (77 cc) NUMBER OF CYLINDERS: 1 CYLINDER BORE: 2.0 in. (50.8 mm) PISTON STROKE: 1.5 in. (38 mm) CYLINDER TYPE: Aluminum with cast iron sleeve INTAKE METHOD: Reed valve MANUFACTURER ADVERTISED H.P.: 4 WEIGHT: 23 lbs. (10.4 kg) powerhead only OPERATOR CONFIGURATION: One Man operation HANDLEBAR SYSTEM: Rigid CHAIN BRAKE: none CLUTCH: Centrifugal DRIVE TYPE: Direct CONSTRUCTION: Sand cast magnesium MAGNETO TYPE: Wico CARBURETOR: Tillotson HL series AIR FILTER SYSTEM: Skinner ribbon element STARTER TYPE: Fairbanks Morse automatic rewind OIL PUMP: Manual MAXIMUM ENGINE RPM: 4,500 IDLE RPM: CRANKSHAFT MAIN BEARINGS: Ball RECOMMENDED FUEL OCTANE: Regular grade 72 to 83 MIX OIL SPECIFICATION: SAE 30 non-detergent CHAIN PITCH: 7/16 in. CHAIN TYPE: Oregon 62C SHORTEST GUIDE BAR SUPPLIED: 16 in. (40 cm) LONGEST GUIDE BAR SUPPLIED: 20 in. (50 cm) COLOUR SCHEME: COMMENTS: Used Power Products engine AH-47 type 1095C