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Model: 3-25 (late)

MANUFACTURED BY:
McCULLOCH MOTORS CORP.
LOS ANGELES, CALIFORNIA, U.S.A.
SERIES OR ASSEMBLY NUMBER:
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:

COMMENTS:
This model was produced in large numbers



 

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