MANUFACTURED BY: |  | BOLENS CHAIN SAWS |
 | | PORT WASHINGTON, WISCONSIN, U.S.A. |
SERIES OR ASSEMBLY NUMBER: | | |
SERIAL NUMBER PREFIX: | | |
YEAR INTRODUCED: | | 1957 |
YEAR DISCONTINUED: | | |
ENGINE DISPLACEMENT: | | 4.7 cu. in. (77 cc) |
NUMBER OF CYLINDERS: | | 1 |
CYLINDER BORE: | | 2.0 in. (50.8 mm) |
PISTON STROKE: | | 1.50 in. (38.1 mm) |
PISTON RING THICKNESS: | | |
CYLINDER TYPE: | | Aluminum with cast iron sleeve |
INTAKE METHOD: | | Reed valves |
MANUFACTURER ADVERTISED H.P.: | | 4 |
WEIGHT: | | 21 lbs. (9.5 kg) powerhead only |
OPERATOR CONFIGURATION: | | One Man operation |
HANDLEBAR SYSTEM: | | Rigid |
CHAIN BRAKE: | | none |
CLUTCH: | | Fairbanks Morse Centrifugal |
DRIVE TYPE: | | Direct |
CONSTRUCTION: | | Sand cast magnesium |
MAGNETO TYPE: | | Phelon |
CARBURETOR: | | Tillotson MD float type |
MAJOR REPAIR KIT: | | nla |
MINOR REPAIR KIT: | | nla |
AIR FILTER SYSTEM: | | Skinner ribbon filter element |
STARTER TYPE: | | Fairbanks Morse automatic rewind |
OIL PUMP: | | Manual |
MAXIMUM ENGINE RPM: | | 5,000 |
IDLE RPM: | | |
IGNITION TIMING: | | 0.025 in. (0.635 mm) before TDC |
BREAKER POINT SETTING: | | 0.020 in. (0.51 mm) |
FLYWHEEL/COIL AIR GAP: | | fixed |
SPARK PLUG TYPE: | | Champion J8J |
SPARK PLUG GAP: | | 0.030 in. (0.76 mm) |
CRANKSHAFT MAIN BEARINGS: | | Ball |
FUEL TANK CAPACITY: | | 1-1/4 U.S. fluid quart |
FUEL OIL RATIO: | | 1/2 pint to 1 U.S. gallon = 16:1 |
RECOMMENDED FUEL OCTANE: | | 72 to 83 (regular grade) |
MIX OIL SPECIFICATION: | | Two-stroke mix oil |
CHAIN PITCH: | | 7/16 in., .063" |
CHAIN TYPE: | | Oregon 62C |
BAR MOUNT PATTERN: | | |
SHORTEST GUIDE BAR SUPPLIED: | | 14 in. (35 cm) |
LONGEST GUIDE BAR SUPPLIED: | | 24 in. (61 cm) |
COLOUR SCHEME: | | Bolens metallic Green |
PAINT CODES: | | |
ILLUSTRATED PARTS LIST: | | |
SERVICE MANUAL: | | |