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Model: 090

MANUFACTURED BY:
STIHL ANDREAS MASCHINENFABRIK
STUTTGART, GERMANY
SERIES OR ASSEMBLY NUMBER:
1109
YEAR INTRODUCED:
1968
YEAR DISCONTINUED:
ENGINE DISPLACEMENT:
137 ccm (8.36 cu. in.)
NUMBER OF CYLINDERS:
1
CYLINDER BORE:
66mm (2.64 in.)
PISTON STROKE:
40mm (1.6 in.)
CYLINDER TYPE:
Aluminum with chrome plated bore
INTAKE METHOD:
Piston ported
MANUFACTURER ADVERTISED H.P.:
13 @ 6,500 RPM
WEIGHT:
13.9 kg (30.6 lbs.)
OPERATOR CONFIGURATION:
One Man operation
HANDLEBAR SYSTEM:
Rigid
CHAIN BRAKE:
none
CLUTCH:
Centrifugal
DRIVE TYPE:
Direct
CONSTRUCTION:
Die cast magnesium
MAGNETO TYPE:
Bosch
CARBURETOR:
Tillotson HL-244A, 324A, 327C, 331A series
MAJOR REPAIR KIT:
RK-113HL for HL-244A, 324A
RK-114HL for HL-327C
MINOR REPAIR KIT:
DG-5HL for all
AIR FILTER SYSTEM:
Nylon mesh element
STARTER TYPE:
Automatic rewind (Fairbanks Morse type)
OIL PUMP:
Automatic with manual assist
MAXIMUM ENGINE RPM:
6,500 to 7,000, 8,000 FREE
IDLE RPM:
IGNITION TIMING:
3mm (0.12 in.) before TDC
BREAKER POINT SETTING:
0.4mm (0.016 in.)
FLYWHEEL/COIL AIR GAP:
SPARK PLUG TYPE:
Bosch WKA 225 T 6
SPARK PLUG GAP:
0.51mm (0.020 in.)
CRANKSHAFT MAIN BEARINGS:
Needle roller
FUEL TANK CAPACITY:
1.2 litres (2.54 pints)
FUEL OIL RATIO:
20:1 after break in
RECOMMENDED FUEL OCTANE:
Regular
MIX OIL SPECIFICATION:
Castrol 2-Stroke SAE 40 or DeLuxe SAE 50
CHAIN PITCH:
.404 in., optional 1/2 in.
CHAIN TYPE:
Oregon
BAR MOUNT PATTERN:
SHORTEST GUIDE BAR SUPPLIED:
53cm (21 in.)
LONGEST GUIDE BAR SUPPLIED:
152cm (60 in.)
COLOUR SCHEME:
Grey with Red top cover
PAINT CODES:
ILLUSTRATED PARTS LIST:
SERVICE MANUAL:

COMMENTS:



above photo courtesy Mike Van Yahres
photo courtesy Steve Melzer
 

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