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Model: 4M

MANUFACTURED BY:
DRUZHBA
RUSSIA
SERIES OR ASSEMBLY NUMBER:
YEAR INTRODUCED:
1950
YEAR DISCONTINUED:
1953
ENGINE DISPLACEMENT:
48 ccm
NUMBER OF CYLINDERS:
1
CYLINDER BORE:
38 mm
PISTON STROKE:
40 mm
PISTON RING THICKNESS:
CYLINDER TYPE:
INTAKE METHOD:
MANUFACTURER ADVERTISED H.P.:
2.94 kW
WEIGHT:
11 kg (24 lbs.) with 18 in. bar and chain
OPERATOR CONFIGURATION:
One Man operation
HANDLEBAR SYSTEM:
Anti-vibration
CHAIN BRAKE:
none
CLUTCH:
Centrifugal
DRIVE TYPE:
Gear reduction
CONSTRUCTION:
MAGNETO TYPE:
CARBURETOR:
MAJOR REPAIR KIT:
MINOR REPAIR KIT:
AIR FILTER SYSTEM:
STARTER TYPE:
Automatic rewind, can be removed to allowing cooling air to enter, also to prevent snow from entering starter in winter
OIL PUMP:
MAXIMUM ENGINE RPM:
5,200, 4,000 under load
IDLE RPM:
IGNITION TIMING:
BREAKER POINT SETTING:
FLYWHEEL/COIL AIR GAP:
SPARK PLUG TYPE:
SPARK PLUG GAP:
CRANKSHAFT MAIN BEARINGS:
FUEL TANK CAPACITY:
1.5 L
FUEL OIL RATIO:
RECOMMENDED FUEL OCTANE:
MIX OIL SPECIFICATION:
CHAIN PITCH:
.404 in.
CHAIN TYPE:
Chipper type
BAR MOUNT PATTERN:
SHORTEST GUIDE BAR SUPPLIED:
16 in.
LONGEST GUIDE BAR SUPPLIED:
COLOUR SCHEME:
PAINT CODES:
ILLUSTRATED PARTS LIST:
SERVICE MANUAL:

COMMENTS:
Operator did not have to bend over to perform felling tasks. Transmission swivels for felling.


photographs courtesy George Blake collection

 

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