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Model: 525

MANUFACTURED BY:
JONSEREDS FABRIKERS AB
PARTILLE, SWEDEN
SERIES OR ASSEMBLY NUMBER:
YEAR INTRODUCED:
1984
YEAR DISCONTINUED:
1986
ENGINE DISPLACEMENT:
49 cc (3.0 cu. in.)
NUMBER OF CYLINDERS:
1
CYLINDER BORE:
44 mm (1.73 in.)
PISTON STROKE:
32 mm (1.26 in.)
PISTON RING THICKNESS:
CYLINDER TYPE:
Aluminum with chrome plated bore
INTAKE METHOD:
Piston ported
MANUFACTURER ADVERTISED H.P.:
WEIGHT:
5.67 kg with 38 cm bar & chain
12.5 lbs. with 15 in. bar & chain
OPERATOR CONFIGURATION:
One Man operation
HANDLEBAR SYSTEM:
Anti-vibration
CHAIN BRAKE:
Inertia activated
CLUTCH:
Centrifugal
DRIVE TYPE:
Direct
CONSTRUCTION:
Die cast magnesium
MAGNETO TYPE:
Electronic
CARBURETOR:
Walbro HDA-3-1 HDA-52-1
Tillotson HK-23E
MAJOR REPAIR KIT:
K22-HDA for Walbro
RK-32HK for Tillotson
MINOR REPAIR KIT:
D22-HDA for Walbro
DG-1HK for Tillotson
AIR FILTER SYSTEM:
Nylon mesh cartridge
STARTER TYPE:
Automatic rewind
OIL PUMP:
Automatic
MAXIMUM ENGINE RPM:
9,000
IDLE RPM:
IGNITION TIMING:
fixed
BREAKER POINT SETTING:
none
FLYWHEEL/COIL AIR GAP:
0.3 mm (0.012 in.)
SPARK PLUG TYPE:
Champion RCJ7Y, Bosch WS7F
SPARK PLUG GAP:
0.51 mm (0.020 in.)
CRANKSHAFT MAIN BEARINGS:
Ball
FUEL TANK CAPACITY:
600 ml (20.3 fl. oz.)
FUEL OIL RATIO:
40:1
RECOMMENDED FUEL OCTANE:
Regular
MIX OIL SPECIFICATION:
Electrolux approved mix oil
CHAIN PITCH:
.325 in.
CHAIN TYPE:
BAR MOUNT PATTERN:
01 link
SHORTEST GUIDE BAR SUPPLIED:
30 cm (12 in.)
LONGEST GUIDE BAR SUPPLIED:
50 cm (20 in.)
COLOUR SCHEME:
Red and Black
PAINT CODES:
ILLUSTRATED PARTS LIST:
SERVICE MANUAL:

COMMENTS:

Colour photographs courtesy George Blake collection
 

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