MANUFACTURED BY: |  | HOFFCO INC. |
 | | RICHMOND, INDIANA, U.S.A. |
SERIES OR ASSEMBLY NUMBER: | | |
SERIAL NUMBER PREFIX: | | |
YEAR INTRODUCED: | | 1958 |
YEAR DISCONTINUED: | | |
ENGINE DISPLACEMENT: | | 5.10 cu. in. (83.5 cc) |
NUMBER OF CYLINDERS: | | 1 |
CYLINDER BORE: | | 2.0 in. (50.8 mm) |
PISTON STROKE: | | 1.625 in. (41 mm) |
PISTON RING THICKNESS: | | |
CYLINDER TYPE: | | Aluminum with cast iron sleeve |
INTAKE METHOD: | | Reed valves |
MANUFACTURER ADVERTISED H.P.: | | |
WEIGHT: | | 26 lbs. (11.8 kg) powerhead only |
OPERATOR CONFIGURATION: | | One Man operation |
HANDLEBAR SYSTEM: | | Rigid |
CHAIN BRAKE: | | none |
CLUTCH: | | Centrifugal |
DRIVE TYPE: | | Gear reduction |
CONSTRUCTION: | | Sand cast magnesium/aluminum alloy |
MAGNETO TYPE: | | Wico FW-2317 |
CARBURETOR: | | Tillotson HL series |
MAJOR REPAIR KIT: | | nla |
MINOR REPAIR KIT: | | DG-1HL |
AIR FILTER SYSTEM: | | Skinner ribbon element |
STARTER TYPE: | | Fairbanks Morse automatic rewind |
OIL PUMP: | | Manual |
MAXIMUM ENGINE RPM: | | 4,500 |
IDLE RPM: | | |
IGNITION TIMING: | | 0.21875 in. (5.5 mm) before TDC with stator secured mid range of mounting holes |
BREAKER POINT SETTING: | | 0.020 in. (0.51 mm) |
FLYWHEEL/COIL AIR GAP: | | Position is fixed |
SPARK PLUG TYPE: | | Champion J12J |
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 41C or 9C |
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: | | |