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Model: 031 AV

MANUFACTURED BY:
STIHL ANDREAS MASCHINENFABRIK
STUTTGART, GERMANY
SERIES OR ASSEMBLY NUMBER:
1113
YEAR INTRODUCED:
1971
YEAR DISCONTINUED:
ENGINE DISPLACEMENT:
48ccm (2.93 cu. in.)
NUMBER OF CYLINDERS:
11
CYLINDER BORE:
44mm (1.73 in.)
PISTON STROKE:
32mm (1.26 in.)
CYLINDER TYPE:
Aluminum with chrome plated bore
INTAKE METHOD:
Piston ported
MANUFACTURER ADVERTISED H.P.:
WEIGHT:
6.6 kg (14.5 lbs.) powerhead only
OPERATOR CONFIGURATION:
One Man operation
HANDLEBAR SYSTEM:
Anti-vibration
CHAIN BRAKE:
Optional
CLUTCH:
Centrifugal
DRIVE TYPE:
Direct
CONSTRUCTION:
Die cast magnesium
MAGNETO TYPE:
Bosch flywheel magneto later series Transistorized
CARBURETOR:
Tillotson HU-3C, G series
MAJOR REPAIR KIT:
RK-14HU
MINOR REPAIR KIT:
DG-2HU
AIR FILTER SYSTEM:
Nylon mesh cartridge
STARTER TYPE:
Stihl automatic rewind
OIL PUMP:
Automatic
MAXIMUM ENGINE RPM:
12,000
IDLE RPM:
2,700
IGNITION TIMING:
2.0 to 2.3mm (0.008 to 0.009 in.) before TDC
BREAKER POINT SETTING:
0.35 to 0.40mm (0.014 to 0.016 in.)
FLYWHEEL/COIL AIR GAP:
SPARK PLUG TYPE:
Bosch WSR6F, Champion RCJ7Y
SPARK PLUG GAP:
0.51mm (0.020 in.)
CRANKSHAFT MAIN BEARINGS:
Ball
FUEL TANK CAPACITY:
540ml (18.25 fl. oz.)
FUEL OIL RATIO:
40:1 with Stihl oil
RECOMMENDED FUEL OCTANE:
Regular
MIX OIL SPECIFICATION:
Stihl two-cycle chain saw mix oil
CHAIN PITCH:
3/8 in.
CHAIN TYPE:
Stihl
BAR MOUNT PATTERN:
SHORTEST GUIDE BAR SUPPLIED:
35cm (14 in.)
LONGEST GUIDE BAR SUPPLIED:
50cm (20 in.)
COLOUR SCHEME:
Grey with Orange top cover
PAINT CODES:
ILLUSTRATED PARTS LIST:
SERVICE MANUAL:

COMMENTS:
Model 031AVQ equipped with chain brake

 

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