MANUFACTURED BY: |  | McCULLOCH MOTORS CORP. |
 | | LOS ANGELES, CALIFORNIA, U.S.A. |
SERIES OR ASSEMBLY NUMBER: | | none |
SERIAL NUMBER PREFIX: | | 7-55 |
YEAR INTRODUCED: | | March 1951 |
YEAR DISCONTINUED: | | August 1953 |
ENGINE DISPLACEMENT: | | 9.82 cu. in. (161ccm) |
NUMBER OF CYLINDERS: | | 1 |
CYLINDER BORE: | | 2.50 in. (63.5mm) |
PISTON STROKE: | | 2.00 in. (50.8mm) |
PISTON RING THICKNESS: | | |
CYLINDER TYPE: | | Aluminum with cast iron sleeve |
INTAKE METHOD: | | Rotary vavle |
MANUFACTURER ADVERTISED H.P.: | | 7 |
WEIGHT: | | 55 lbs. (25 kg) powerhead only |
OPERATOR CONFIGURATION: | | Two Man and One Man operation |
HANDLEBAR SYSTEM: | | Rigid |
CHAIN BRAKE: | | none |
CLUTCH: | | Centrifugal |
DRIVE TYPE: | | Bevel gear transmission |
CONSTRUCTION: | | Die cast MAGNESIUM |
MAGNETO TYPE: | | McCulloch |
CARBURETOR: | | McCulloch diaphragm type |
MAJOR REPAIR KIT: | | nla |
MINOR REPAIR KIT: | | nla |
AIR FILTER SYSTEM: | | Wire screen |
STARTER TYPE: | | McCulloch automatic rewind |
OIL PUMP: | | Manual |
MAXIMUM ENGINE RPM: | | |
IDLE RPM: | | |
IGNITION TIMING: | | fixed |
BREAKER POINT SETTING: | | 0.018 in. ` |
FLYWHEEL/COIL AIR GAP: | | 0.008 to 0.012 in. (0.2 to 0.3 mm) |
SPARK PLUG TYPE: | | Champion J8J |
SPARK PLUG GAP: | | 0.020 in. (0.51 mm) |
CRANKSHAFT MAIN BEARINGS: | | Ball |
FUEL TANK CAPACITY: | | |
FUEL OIL RATIO: | | 1/2 pint to 1 gallon = 16:1 |
RECOMMENDED FUEL OCTANE: | | Regular grade |
MIX OIL SPECIFICATION: | | SAE 30 non detergent or McCulloch two-cycle chain saw mix |
CHAIN PITCH: | | 3/4 in. |
CHAIN TYPE: | | McCulloch |
BAR MOUNT PATTERN: | | |
SHORTEST GUIDE BAR SUPPLIED: | | 20 in. |
LONGEST GUIDE BAR SUPPLIED: | | 60 in. |
COLOUR SCHEME: | | McCulloch Yellow enamel |
PAINT CODES: | | |
ILLUSTRATED PARTS LIST: | | 56776, micro fiche card 1 |
SERVICE MANUAL: | | |