MANUFACTURED BY: |  | McCULLOCH MOTORS CORP. |
 | | LOS ANGELES, CALIFORNIA, U.S.A. |
SERIES OR ASSEMBLY NUMBER: | | Type 1 |
SERIAL NUMBER PREFIX: | | 3-25 |
YEAR INTRODUCED: | | October 1949 |
YEAR DISCONTINUED: | | March 1950 |
ENGINE DISPLACEMENT: | | 4.71 cu. in. (77ccm) |
NUMBER OF CYLINDERS: | | 1 |
CYLINDER BORE: | | 2.00 in. (50.8mm) |
PISTON STROKE: | | 1.50 in. (38mm) |
PISTON RING THICKNESS: | | |
CYLINDER TYPE: | | Aluminum CHROME plated, later with cast iron sleeve |
INTAKE METHOD: | | Rotary valve |
MANUFACTURER ADVERTISED H.P.: | | 3 @ 4,500 rpm |
WEIGHT: | | 25 lbs. (11.34 kg.) with 18 in. bar & chain |
OPERATOR CONFIGURATION: | | One Man operation |
HANDLEBAR SYSTEM: | | Rigid |
CHAIN BRAKE: | | none |
CLUTCH: | | Centrifugal |
DRIVE TYPE: | | Gear reduction 2.69-1 |
CONSTRUCTION: | | Die cast MAGNESIUM |
MAGNETO TYPE: | | McCulloch |
CARBURETOR: | | McCulloch all position diaphragm type |
MAJOR REPAIR KIT: | | nla |
MINOR REPAIR KIT: | | nla |
AIR FILTER SYSTEM: | | Wire screen |
STARTER TYPE: | | McCulloch Kickproof automatic rewind with steel cable |
OIL PUMP: | | Manual |
MAXIMUM ENGINE RPM: | | |
IDLE RPM: | | |
IGNITION TIMING: | | fixed |
BREAKER POINT SETTING: | | 0.018 in. |
FLYWHEEL/COIL AIR GAP: | | 0.006 to 0.012 in. (0.15 to 0.3 mm) |
SPARK PLUG TYPE: | | Champion J8J |
SPARK PLUG GAP: | | 0.020 in. |
CRANKSHAFT MAIN BEARINGS: | | Ball and roller types |
FUEL TANK CAPACITY: | | |
FUEL OIL RATIO: | | 1/2 pint to 1 gallon = 16:1 |
RECOMMENDED FUEL OCTANE: | | Regular |
MIX OIL SPECIFICATION: | | SAE 30 |
CHAIN PITCH: | | 1/2 in. |
CHAIN TYPE: | | McCulloch |
BAR MOUNT PATTERN: | | |
SHORTEST GUIDE BAR SUPPLIED: | | 18 in. (45cm) bar with holes designed to reduce weight |
LONGEST GUIDE BAR SUPPLIED: | | |
COLOUR SCHEME: | | McCulloch Yellow enamel |
PAINT CODES: | | |
ILLUSTRATED PARTS LIST: | | 56773, micro fiche card 2 |
SERVICE MANUAL: | | |