MANUFACTURED BY: |  | STIHL ANDREAS MASCHINENFABRIK |
 | | STUTTGART, GERMANY |
SERIES OR ASSEMBLY NUMBER: | | 1120 |
SERIAL NUMBER PREFIX: | | |
YEAR INTRODUCED: | | 1980 |
YEAR DISCONTINUED: | | 1990 |
ENGINE DISPLACEMENT: | | 41ccm (2.5 cu. in.) |
NUMBER OF CYLINDERS: | | 1 |
CYLINDER BORE: | | 38 mm (1.5 in.) |
PISTON STROKE: | | 36 mm (1.42 in.) |
PISTON RING THICKNESS: | | 1.5 mm, 2 rings used |
CYLINDER TYPE: | | Aluminum with Chrome plated bore |
INTAKE METHOD: | | Piston ported |
MANUFACTURER ADVERTISED H.P.: | | not advertised |
WEIGHT: | | 4.7 kg with 30 cm bar & chain
10.6 lbs. with 13 in. bar & chain |
OPERATOR CONFIGURATION: | | One Man operation |
HANDLEBAR SYSTEM: | | Anti-vibration |
CHAIN BRAKE: | | Optional on Q model |
CLUTCH: | | Centrifugal |
DRIVE TYPE: | | Direct |
CONSTRUCTION: | | Injection molded Polymer, die cast Magnesium |
MAGNETO TYPE: | | Bosch electronic |
CARBURETOR: | | Walbro WT-29, WA-99, ZAMA C1S-S1 |
MAJOR REPAIR KIT: | | K10-WAT for Walbro |
MINOR REPAIR KIT: | | D10-WAT for Walbro |
AIR FILTER SYSTEM: | | Felt element |
STARTER TYPE: | | Stihl automatic rewind, 3.5 mm cord, 960 mm long |
OIL PUMP: | | Automatic, diaphragm & plunger type |
MAXIMUM ENGINE RPM: | | 9,500 to 9,800 |
IDLE RPM: | | 2,200 to 2,400 |
IGNITION TIMING: | | 1.8 to 2.2 mm (0.071 to 0.087 in.) before TDC |
BREAKER POINT SETTING: | | 0.3 to 0.4 mm (0.012 to 0.016 in.) |
FLYWHEEL/COIL AIR GAP: | | 0.02 mm (0.008 in.) |
SPARK PLUG TYPE: | | Bosch WSR6F, Champion RCJ7Y |
SPARK PLUG GAP: | | 0.51 mm (0.020 in.) |
CRANKSHAFT MAIN BEARINGS: | | Caged needle roller |
FUEL TANK CAPACITY: | | 250ml (8.4 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. Picco (low profile) |
CHAIN TYPE: | | Stihl Oilomatic Picco |
BAR MOUNT PATTERN: | | 26 link |
SHORTEST GUIDE BAR SUPPLIED: | | 30 cm (12 in.) |
LONGEST GUIDE BAR SUPPLIED: | | 40 cm (16 in.) |
COLOUR SCHEME: | | Grey with Red air filter cover |
PAINT CODES: | | |
ILLUSTRATED PARTS LIST: | | |
SERVICE MANUAL: | | |