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Model: 7-10A

MANUFACTURED BY:
McCULLOCH MOTORS CORP.
LOS ANGELES, CALIFORNIA, U.S.A.
SERIES OR ASSEMBLY NUMBER:
600052, serial prefix 10, 11, 12, 13
YEAR INTRODUCED:
September 1970
YEAR DISCONTINUED:
September 1971
ENGINE DISPLACEMENT:
4.3 cu. in. (70.5cc)
NUMBER OF CYLINDERS:
1
CYLINDER BORE:
2.00 in. (50.8 mm)
PISTON STROKE:
1.375 in. (34.92 mm)
CYLINDER TYPE:
Aluminum with chrome plated bore
INTAKE METHOD:
Piston ported
MANUFACTURER ADVERTISED H.P.:
not advertised
WEIGHT:
15.6 lbs. (7.1 kg) powerhead only
OPERATOR CONFIGURATION:
One Man operation
HANDLEBAR SYSTEM:
Rigid
CHAIN BRAKE:
Yes, mechanical
CLUTCH:
Centrifugal
DRIVE TYPE:
Direct
CONSTRUCTION:
Die cast magnesium
MAGNETO TYPE:
Mcculloch flywheel breaker point system
CARBURETOR:
Tillotson HS-165A
Walbro SDC58
Zama
MAJOR REPAIR KIT:
RK-23HS for Tillotson
K10-SDC for Walbro
RB- for Zama
MINOR REPAIR KIT:
DG-5HS/T for Tillotson
D10-SDC for Walbro
GND- for Zama
AIR FILTER SYSTEM:
Flocked wire screen element
STARTER TYPE:
McCulloch automatic rewind on left side
OIL PUMP:
Automatic with manual override
MAXIMUM ENGINE RPM:
IDLE RPM:
IGNITION TIMING:
26 degrees before TDC
BREAKER POINT SETTING:
0.019 in. (0.48 mm) to 0.020 in. (0.5 mm)
FLYWHEEL/COIL AIR GAP:
0.011 to 0.015 in. (0.3 to 0.4 mm)
SPARK PLUG TYPE:
AC CS42T
SPARK PLUG GAP:
0.025 in. (0.63 mm)
CRANKSHAFT MAIN BEARINGS:
Ball and caged needle roller
FUEL TANK CAPACITY:
1.5 U.S. Pints (791 ml)
FUEL OIL RATIO:
40:1
RECOMMENDED FUEL OCTANE:
Regular
MIX OIL SPECIFICATION:
McCulloch two-cycle chain saw mix oil
CHAIN PITCH:
3/8 in.
CHAIN TYPE:
McCulloch
BAR MOUNT PATTERN:
11 link
SHORTEST GUIDE BAR SUPPLIED:
16 in. (40 cm)
LONGEST GUIDE BAR SUPPLIED:
28 in. (71 cm)
COLOUR SCHEME:
McCulloch Yellow enamel with Black
PAINT CODES:
ILLUSTRATED PARTS LIST:
SERVICE MANUAL:

COMMENTS:

Photographs courtesy Al Smith
 

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