Home | Chain Saws | Chain Saw Chain | Bar Mount Patterns | Carburetors | Manufacturers | Trademarks | Collectors | Bulletins | Events | Stolen Saws | Chain Saw Age Reprints | Newsletter | Marketplace | Parts Sources | Cartoons | Links | Your Host



Model: 50

MANUFACTURED BY:
JONSEREDS FABRIKERS AB
PARTILLE, SWEDEN
SERIES OR ASSEMBLY NUMBER:
SERIAL NUMBER PREFIX:
YEAR INTRODUCED:
1971
YEAR DISCONTINUED:
ENGINE DISPLACEMENT:
44.3 ccm (2.7 cu. in.)
Late version 49 ccm (3.0 cu. in.)
NUMBER OF CYLINDERS:
1
CYLINDER BORE:
42mm, late version 44mm
PISTON STROKE:
32mm
PISTON RING THICKNESS:
CYLINDER TYPE:
Aluminum with chrome plated bore
INTAKE METHOD:
Piston ported
MANUFACTURER ADVERTISED H.P.:
2.0kW @ 8000 rpm
WEIGHT:
5.97kg
OPERATOR CONFIGURATION:
One Man operation
HANDLEBAR SYSTEM:
Anti-vibration
CHAIN BRAKE:
none
CLUTCH:
Centrifugal
DRIVE TYPE:
Direct
CONSTRUCTION:
Die cast magnesium
MAGNETO TYPE:
Pagani
CARBURETOR:
Tillotson HS-21D series
MAJOR REPAIR KIT:
RK-23HS
MINOR REPAIR KIT:
DG-5HS/T
AIR FILTER SYSTEM:
Nylon mesh cartridge
STARTER TYPE:
Jonsereds automatic rewind
OIL PUMP:
Automatic, worm gear driven
MAXIMUM ENGINE RPM:
10,700
IDLE RPM:
2,900
IGNITION TIMING:
2.0mm before TDC
BREAKER POINT SETTING:
0.3 to 0.4mm
FLYWHEEL/COIL AIR GAP:
0.3 mm (0.012 in.)
SPARK PLUG TYPE:
Bosch WS7F
SPARK PLUG GAP:
0.5mm (0.020 in.)
CRANKSHAFT MAIN BEARINGS:
Caged needle roller (Torrington)
FUEL TANK CAPACITY:
800ml
FUEL OIL RATIO:
25:1
RECOMMENDED FUEL OCTANE:
Regular
MIX OIL SPECIFICATION:
Two-cycle chain saw mix oil
CHAIN PITCH:
3/8 in.
CHAIN TYPE:
BAR MOUNT PATTERN:
SHORTEST GUIDE BAR SUPPLIED:
33 cm (13 in.)
LONGEST GUIDE BAR SUPPLIED:
45 cm (18 in.)
COLOUR SCHEME:
Red and Silver enamel
PAINT CODES:
ILLUSTRATED PARTS LIST:
SERVICE MANUAL:

COMMENTS:
later version used 44 mm piston and was 49 cc displacement engine or 3.0 cu. in.

Photographs courtesy George Blake collection
 

Reproduction of this World Wide Web Site in whole or in part is prohibited without permission.
Copyright © 2000-2024 MIKE ACRES - All rights are reserved.