MANUFACTURED BY: |  | STIHL ANDREAS MASCHINENFABRIK |
 | | STUTTGART, GERMANY |
SERIES OR ASSEMBLY NUMBER: | | |
SERIAL NUMBER PREFIX: | | |
YEAR INTRODUCED: | | 2019 |
YEAR DISCONTINUED: | | |
ENGINE DISPLACEMENT: | | 31.8 ccm (1.94 cu. in..) |
NUMBER OF CYLINDERS: | | 1 |
CYLINDER BORE: | | 38 mm (1.6 in.) |
PISTON STROKE: | | 28 mm (1.1 in.) |
PISTON RING THICKNESS: | | |
CYLINDER TYPE: | | Aluminum with chrome plated bore |
INTAKE METHOD: | | Piston ported |
MANUFACTURER ADVERTISED H.P.: | | 1.5 kW (2.0 hp) @ 10,000 rpm |
WEIGHT: | | MS 181 is 4.3 kg (9.5 lbs.)
MS 181C is 4.6 kg (10.1 lbs.)
powerhead only |
OPERATOR CONFIGURATION: | | One Man |
HANDLEBAR SYSTEM: | | Anti-vibration |
CHAIN BRAKE: | | Inertia activated |
CLUTCH: | | Centrifugal |
DRIVE TYPE: | | Direct |
CONSTRUCTION: | | Die cast magnesium, injection molded polymer |
MAGNETO TYPE: | | Electronic |
CARBURETOR: | | |
MAJOR REPAIR KIT: | | |
MINOR REPAIR KIT: | | |
AIR FILTER SYSTEM: | | |
STARTER TYPE: | | Stihl automatic rewind |
OIL PUMP: | | Fully automatic speed controlled oil pump
with rotary piston. Tank capacity 265 ml (9.0 fl. oz.) |
MAXIMUM ENGINE RPM: | | 13,500 |
IDLE RPM: | | 2,800 |
IGNITION TIMING: | | |
BREAKER POINT SETTING: | | none |
FLYWHEEL/COIL AIR GAP: | | |
SPARK PLUG TYPE: | | |
SPARK PLUG GAP: | | |
CRANKSHAFT MAIN BEARINGS: | | |
FUEL TANK CAPACITY: | | 271 ml (9.1 fl. oz.) |
FUEL OIL RATIO: | | |
RECOMMENDED FUEL OCTANE: | | |
MIX OIL SPECIFICATION: | | |
CHAIN PITCH: | | .365 in. (9.32 mm) |
CHAIN TYPE: | | Picco Micro Mini 3, 1.1 mm (0.043 in) gauge |
BAR MOUNT PATTERN: | | |
SHORTEST GUIDE BAR SUPPLIED: | | 30 cm (12 in.) |
LONGEST GUIDE BAR SUPPLIED: | | 40 cm (16 in.) |
COLOUR SCHEME: | | |
PAINT CODES: | | |
ILLUSTRATED PARTS LIST: | | |
SERVICE MANUAL: | | |