MANUFACTURED BY: | | McCULLOCH MOTORS CORP. |
| | LOS ANGELES, CALIFORNIA, U.S.A. |
SERIES OR ASSEMBLY NUMBER: | | none |
SERIAL NUMBER PREFIX: | | 3-25A |
YEAR INTRODUCED: | | 1950 |
YEAR DISCONTINUED: | | March 1953 |
ENGINE DISPLACEMENT: | | 4.71 cu. in. (77 cc) |
NUMBER OF CYLINDERS: | | 1 |
CYLINDER BORE: | | 2.00 in. (50.8 mm) |
PISTON STROKE: | | 1.50 in. (38 mm) |
PISTON RING THICKNESS: | | |
CYLINDER TYPE: | | Aluminum with cast iron sleeve |
INTAKE METHOD: | | Rotary valve |
MANUFACTURER ADVERTISED H.P.: | | 3 @ 4500 rpm |
WEIGHT: | | 25 lbs. (11.34 kg) with 18 in. (45 cm) bar & chain |
OPERATOR CONFIGURATION: | | One Man operation |
HANDLEBAR SYSTEM: | | Rigid |
CHAIN BRAKE: | | none |
CLUTCH: | | Centifugal |
DRIVE TYPE: | | Gear reduction |
CONSTRUCTION: | | Die cast MAGNESIUM |
MAGNETO TYPE: | | McCulloch flywheel type |
CARBURETOR: | | Mcculloch diaphragm type |
MAJOR REPAIR KIT: | | nla |
MINOR REPAIR KIT: | | nla |
AIR FILTER SYSTEM: | | Wire screen element |
STARTER TYPE: | | McCulloch kickproof automatic rewind with steel cable |
OIL PUMP: | | Manual |
MAXIMUM ENGINE RPM: | | 4,500 |
IDLE RPM: | | |
IGNITION TIMING: | | fixed |
BREAKER POINT SETTING: | | 0.018 in. (0.45 mm) |
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. (0.51 mm) |
CRANKSHAFT MAIN BEARINGS: | | Ball and rolle types |
FUEL TANK CAPACITY: | | |
FUEL OIL RATIO: | | 1/2 pint to 1 gallon = 16:1 |
RECOMMENDED FUEL OCTANE: | | Regualr |
MIX OIL SPECIFICATION: | | SAE 30 |
CHAIN PITCH: | | 1/2 in. |
CHAIN TYPE: | | McCulloch |
BAR MOUNT PATTERN: | | |
SHORTEST GUIDE BAR SUPPLIED: | | 18 in. (45 cm) |
LONGEST GUIDE BAR SUPPLIED: | | 30 in. (76 cm) |
COLOUR SCHEME: | | McCulloch Yellow enamel |
PAINT CODES: | | |
ILLUSTRATED PARTS LIST: | | 56772, micro fiche card 2 |
SERVICE MANUAL: | | |