MANUFACTURED BY: |  | STIHL ANDREAS MASCHINENFABRIK |
 | | STUTTGART, GERMANY |
SERIES OR ASSEMBLY NUMBER: | | 1125 |
SERIAL NUMBER PREFIX: | | |
YEAR INTRODUCED: | | 1984 |
YEAR DISCONTINUED: | | 1993 |
ENGINE DISPLACEMENT: | | 57 ccm (3.45 cu. in.) |
NUMBER OF CYLINDERS: | | 1 |
CYLINDER BORE: | | 46 mm (1.81 in.) |
PISTON STROKE: | | 34 mm (1.34 in.) |
PISTON RING THICKNESS: | | |
CYLINDER TYPE: | | Aluminum with Chrome plated bore |
INTAKE METHOD: | | Piston ported |
MANUFACTURER ADVERTISED H.P.: | | |
WEIGHT: | | 11.6 lbs. |
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: | | Electronic |
CARBURETOR: | | Tillotson HK-43A, B series
ZAMA C3A-S19, S31-E, S38-B series |
MAJOR REPAIR KIT: | | RK-33HK for HK-43A, B
RB-31 for Zama |
MINOR REPAIR KIT: | | DG-1HK for HK-43A, B
GND-21 for Zama |
AIR FILTER SYSTEM: | | Nylon mesh cartridge |
STARTER TYPE: | | Automatic rewind |
OIL PUMP: | | Automatic, gear driven, adjustable |
MAXIMUM ENGINE RPM: | | 13,500 |
IDLE RPM: | | 2,700 |
IGNITION TIMING: | | Fixed |
BREAKER POINT SETTING: | | none |
FLYWHEEL/COIL AIR GAP: | | 0.2 to 0.3 mm (0.008 to 0.012 in.) |
SPARK PLUG TYPE: | | Bosch WSRF, NGK BPMR7A, Champion RCJ7Y |
SPARK PLUG GAP: | | 0.51 mm (0.020 in.) |
CRANKSHAFT MAIN BEARINGS: | | Ball |
FUEL TANK CAPACITY: | | |
FUEL OIL RATIO: | | 50:1 with Stihl oil |
RECOMMENDED FUEL OCTANE: | | Regular grade |
MIX OIL SPECIFICATION: | | Stihl two-cycle chain saw mix oil |
CHAIN PITCH: | | 3/8 in., 0.050 gauge |
CHAIN TYPE: | | Stihl |
BAR MOUNT PATTERN: | | 31 link |
SHORTEST GUIDE BAR SUPPLIED: | | 38 cm (15 in.) |
LONGEST GUIDE BAR SUPPLIED: | | |
COLOUR SCHEME: | | |
PAINT CODES: | | |
ILLUSTRATED PARTS LIST: | | |
SERVICE MANUAL: | | |