MANUFACTURED BY: McCULLOCH MOTORS CORP. LOS ANGELES, CALIFORNIA, U.S.A. SERIES OR ASSEMBLY NUMBER: 600061 YEAR INTRODUCED: 1977 YEAR DISCONTINUED: 1988 ENGINE DISPLACEMENT: 4.3 cu. in. (70.5 cc) NUMBER OF CYLINDERS: 1 CYLINDER BORE: 2.00 in. PISTON STROKE: 1.375 in. INTAKE METHOD: Piston ported OPERATOR CONFIGURATION: One Man operation CLUTCH: Centrifugal DRIVE TYPE: Direct CONSTRUCTION: Die cast magnesium MAGNETO TYPE: Breaker point flywheel type CARBURETOR: WAlbro 87666 AIR FILTER SYSTEM: Flocked wire screen STARTER TYPE: Automatic rewind OIL PUMP: Automatic with manual override IGNITION TIMING: 26 degrees before TDC BREAKER POINT SETTING: 0.019 to 0.020 in (0.48 to 0.51 mm) SPARK PLUG TYPE: AC CS45T SPARK PLUG GAP: 0.025 in. (0.63 mm) CRANKSHAFT MAIN BEARINGS: Ball and caged needle roller FUEL OIL RATIO: 40:1 with McCulloch oil RECOMMENDED FUEL OCTANE: Regular MIX OIL SPECIFICATION: McCulloch two-cycle mix oil CHAIN PITCH: 3/8 in. CHAIN TYPE: McCulloch SHORTEST GUIDE BAR SUPPLIED: 13 in. LONGEST GUIDE BAR SUPPLIED: 33 in. COLOUR SCHEME: McCulloch Yellow enamel