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Model: 12-25A

MANUFACTURED BY:
McCULLOCH MOTORS CORP.
LOS ANGELES, CALIFORNIA, U.S.A.
SERIES OR ASSEMBLY NUMBER:
YEAR INTRODUCED:
1948
YEAR DISCONTINUED:
1949
ENGINE DISPLACEMENT:
7.95 cu. in. (130cc)
NUMBER OF CYLINDERS:
1
CYLINDER BORE:
2.25 in. (57mm)
PISTON STROKE:
2 in. 50.8mm)
PISTON RING THICKNESS:
CYLINDER TYPE:
Aluminum chrome plated, later cast iron sleeve
INTAKE METHOD:
Rotary valve
MANUFACTURER ADVERTISED H.P.:
5
WEIGHT:
48 lbs. (21.7 kg) powerhead only
OPERATOR CONFIGURATION:
Two 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 Kickproof automatic rewind
OIL PUMP:
Manual accessory attachment
MAXIMUM ENGINE RPM:
IDLE RPM:
IGNITION TIMING:
Fixed, not adjustable
BREAKER POINT SETTING:
.018 in. (0.04mm)
FLYWHEEL/COIL AIR GAP:
0.008 to 0.010 in. (0.2 to 0.25 mm)
SPARK PLUG TYPE:
Champion J8J
SPARK PLUG GAP:
.020 in. (0.05mm)
CRANKSHAFT MAIN BEARINGS:
Ball
FUEL TANK CAPACITY:
FUEL OIL RATIO:
16:1 1/2 pint per gallon
RECOMMENDED FUEL OCTANE:
Regular
MIX OIL SPECIFICATION:
SAE 30 non-detergent
CHAIN PITCH:
3/4 in.
CHAIN TYPE:
McCulloch
BAR MOUNT PATTERN:
SHORTEST GUIDE BAR SUPPLIED:
20 in. (51cm)
LONGEST GUIDE BAR SUPPLIED:
60 in. (152cm)
COLOUR SCHEME:
McCulloch Yellow
PAINT CODES:
ILLUSTRATED PARTS LIST:
SERVICE MANUAL:

COMMENTS:
First model of gasoline chain saw manufactured completely by McCulloch Motors Corp.



 

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