MANUFACTURED BY: |  | HOFFCO INC. |
 |  | RICHMOND, INDIANA, U.S.A. |
SERIES OR ASSEMBLY NUMBER: |  | |
SERIAL NUMBER PREFIX: |  | |
YEAR INTRODUCED: |  | 1957 |
YEAR DISCONTINUED: |  | |
ENGINE DISPLACEMENT: |  | 6.45 cu. in. (105 cc) |
NUMBER OF CYLINDERS: |  | 1 |
CYLINDER BORE: |  | 2.25 in. (57.1 mm) |
PISTON STROKE: |  | 1.625 in. (41.2 mm) |
PISTON RING THICKNESS: |  | |
CYLINDER TYPE: |  | Aluminum with chrome plated bore |
INTAKE METHOD: |  | Reed valve |
MANUFACTURER ADVERTISED H.P.: |  | 4 @ 4,500 |
WEIGHT: |  | 28 lbs. (12.7 kg) powerhead only |
OPERATOR CONFIGURATION: |  | One Man operation |
HANDLEBAR SYSTEM: |  | Rigid |
CHAIN BRAKE: |  | none |
CLUTCH: |  | Centrifugal |
DRIVE TYPE: |  | Gear reduction with Vari-Speed transmission |
CONSTRUCTION: |  | Sand cast magnesium |
MAGNETO TYPE: |  | Wico FW-2466B |
CARBURETOR: |  | Tillotson |
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: |  | 0.15625 in. (3.9 mm) before TDC with stator secured in full retard position |
BREAKER POINT SETTING: |  | 0.020 in. (0.51 mm) |
FLYWHEEL/COIL AIR GAP: |  | Position is fixed |
SPARK PLUG TYPE: |  | Champion H12J |
SPARK PLUG GAP: |  | 0.040 in. (1.01 mm) |
CRANKSHAFT MAIN BEARINGS: |  | Ball on clutch end, caged needle roller on flywheel end |
FUEL TANK CAPACITY: |  | |
FUEL OIL RATIO: |  | 16:1 |
RECOMMENDED FUEL OCTANE: |  | Regular grade 72 to 83 |
MIX OIL SPECIFICATION: |  | Two cycle chain saw mix oil |
CHAIN PITCH: |  | 1/2 in. |
CHAIN TYPE: |  | Oregon 9C or 41C |
BAR MOUNT PATTERN: |  |  |
SHORTEST GUIDE BAR SUPPLIED: |  | 16 in. (40 cm) |
LONGEST GUIDE BAR SUPPLIED: |  | 25 in. (63.5 cm) |
COLOUR SCHEME: |  | |
PAINT CODES: |  | |
ILLUSTRATED PARTS LIST: |  |  |
SERVICE MANUAL: |  |  |