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Model: 3900 SERIES

MANUFACTURED BY:
BOLENS CHAIN SAWS
PORT WASHINGTON, WISCONSIN, U.S.A.
SERIES OR ASSEMBLY NUMBER:
YEAR INTRODUCED:
1958
YEAR DISCONTINUED:
ENGINE DISPLACEMENT:
77 ccm
NUMBER OF CYLINDERS:
1
CYLINDER BORE:
PISTON STROKE:
PISTON RING THICKNESS:
CYLINDER TYPE:
INTAKE METHOD:
Reed valves
MANUFACTURER ADVERTISED H.P.:
WEIGHT:
OPERATOR CONFIGURATION:
One Man operation
HANDLEBAR SYSTEM:
Rigid
CHAIN BRAKE:
none
CLUTCH:
Centrifugal
DRIVE TYPE:
Direct
CONSTRUCTION:
Sand cast magnesium
MAGNETO TYPE:
CARBURETOR:
Tillotson HP series
MAJOR REPAIR KIT:
nla
MINOR REPAIR KIT:
nla
AIR FILTER SYSTEM:
Skinner element
STARTER TYPE:
Fairbanks Morse automatic rewind
OIL PUMP:
Manual
MAXIMUM ENGINE RPM:
5,500
IDLE RPM:
IGNITION TIMING:
BREAKER POINT SETTING:
FLYWHEEL/COIL AIR GAP:
SPARK PLUG TYPE:
SPARK PLUG GAP:
CRANKSHAFT MAIN BEARINGS:
FUEL TANK CAPACITY:
FUEL OIL RATIO:
RECOMMENDED FUEL OCTANE:
MIX OIL SPECIFICATION:
CHAIN PITCH:
CHAIN TYPE:
BAR MOUNT PATTERN:
SHORTEST GUIDE BAR SUPPLIED:
LONGEST GUIDE BAR SUPPLIED:
COLOUR SCHEME:
PAINT CODES:
ILLUSTRATED PARTS LIST:
SERVICE MANUAL:

COMMENTS:


Colour Photographs courtesy Cliff Rosenrans collection

 

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