MANUFACTURED BY: |  | STRUNK MANUFACTURING CO. |
 | | COATESVILLE, PENNSYLVANIA, U.S.A. |
SERIES OR ASSEMBLY NUMBER: | | |
SERIAL NUMBER PREFIX: | | |
YEAR INTRODUCED: | | 1957 |
YEAR DISCONTINUED: | | |
ENGINE DISPLACEMENT: | | 4.7 cu. in. (77cc) |
NUMBER OF CYLINDERS: | | 1 |
CYLINDER BORE: | | 2.0 in. (50.8 mm) |
PISTON STROKE: | | 1.5 in. (38 mm) |
PISTON RING THICKNESS: | | |
CYLINDER TYPE: | | Aluminum with cast iron sleeve |
INTAKE METHOD: | | Reed valve |
MANUFACTURER ADVERTISED H.P.: | | 3.5 |
WEIGHT: | | 21 lbs. (9.5 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 FW2288 |
CARBURETOR: | | Tillotson HP-12A |
MAJOR REPAIR KIT: | | |
MINOR REPAIR KIT: | | |
AIR FILTER SYSTEM: | | Skinner ribbon element |
STARTER TYPE: | | Fairbanks Morse automatic rewind |
OIL PUMP: | | Manual |
MAXIMUM ENGINE RPM: | | 4,500 |
IDLE RPM: | | |
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: | | |
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 motor oil |
CHAIN PITCH: | | 1/2 in. |
CHAIN TYPE: | | Atkins |
BAR MOUNT PATTERN: | | |
SHORTEST GUIDE BAR SUPPLIED: | | 16 in. (40 cm) |
LONGEST GUIDE BAR SUPPLIED: | | 19 in. (48 cm) |
COLOUR SCHEME: | | Grey enamel |
PAINT CODES: | | |
ILLUSTRATED PARTS LIST: | | |
SERVICE MANUAL: | | |