MANUFACTURED BY:
STRUNK MANUFACTURING CO.
COATESVILLE, PENNSYLVANIA, U.S.A.
SERIES OR ASSEMBLY NUMBER:
YEAR INTRODUCED:
1957
YEAR DISCONTINUED:
ENGINE DISPLACEMENT:
4.7 cu. in. (77cc)
NUMBER OF CYLINDERS:
1
CYLINDER BORE:
2.0 in. (50.8mm)
PISTON STROKE:
1.50 in. (38 mm)
CYLINDER TYPE:
Aluminum with chrome plated bore
INTAKE METHOD:
Reed valve
MANUFACTURER ADVERTISED H.P.:
3.5
WEIGHT :
25 lbs. (11.3 kg) powerhead only
OPERATOR CONFIGURATION:
One Man operation
HANDLEBAR SYSTEM:
Rigid
CHAIN BRAKE:
none
CLUTCH:
Centrifugal
DRIVE TYPE:
Direct
CONSTRUCTION:
Sand cast aluminum
MAGNETO TYPE:
Wico
CARBURETOR:
Tillotson HP-12A
MAJOR REPAIR KIT:
MINOR REPAIR KIT:
AIR FILTER SYSTEM:
Skinner ribbon element
STARTER TYPE:
Fairbanks Morse automatic rewind
OIL PUMP:
Automatic pressure system with manual override
OPERATING RPM:
4,500
IGNITION TIMING:
0.175 in. (4.44 mm) before TDC
BREAKER POINT SETTING:
0.020 in. (0.51 mm)
FLYWHEEL/COIL AIR GAP:
Position is fixed
SPARK PLUG TYPE:
Champion J8J, Autolite A7X, AC M45
SPARK PLUG GAP:
0.030 in. (0.76 mm)
CRANKSHAFT MAIN BEARINGS:
Ball
FUEL TANK CAPACITY:
64 fl. oz. (1.89 litres)
FUEL OIL RATIO:
1/2 pint to 1 gallon = 16:1
RECOMMENDED FUEL OCTANE:
Regular grade 72 to 83
MIX OIL SPECIFICATION:
SAE 30 non-detergent
CHAIN PITCH:
1/2 in.
CHAIN TYPE:
BAR MOUNT PATTERN:
SHORTEST GUIDE BAR SUPPLIED:
16 in. (40 cm)
LONGEST GUIDE BAR SUPPLIED:
19 in. (48 cm)
COLOUR SCHEME:
Red enamel