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Model: MS 660, MS 660W, MS 660 Arctic

MANUFACTURED BY:
STIHL ANDREAS MASCHINENFABRIK
STUTTGART, GERMANY
SERIES OR ASSEMBLY NUMBER:
1122
SERIAL NUMBER PREFIX:
YEAR INTRODUCED:
2011
YEAR DISCONTINUED:
ENGINE DISPLACEMENT:
91.6 ccm (5.6 CU. in.)
NUMBER OF CYLINDERS:
1
CYLINDER BORE:
54 mm
PISTON STROKE:
40 mm (1.57 in.)
PISTON RING THICKNESS:
2 of 1.2 mm
CYLINDER TYPE:
Aluminum with chrome plated bore
INTAKE METHOD:
Piston ported
MANUFACTURER ADVERTISED H.P.:
7 bhp
WEIGHT:
7.5 kg (16.5 lbs.) powerhead only
OPERATOR CONFIGURATION:
One Man
HANDLEBAR SYSTEM:
Anti-Vibration
CHAIN BRAKE:
Inertia Activated
CLUTCH:
Centrifugal, 3 metal shoes
DRIVE TYPE:
Direct
CONSTRUCTION:
Die cast Magnesium, injection molded polymer
MAGNETO TYPE:
Electronic
CARBURETOR:
Walbro WJ-67
MAJOR REPAIR KIT:
1122 007 1060
MINOR REPAIR KIT:
AIR FILTER SYSTEM:
Filter element
STARTER TYPE:
Stihl Elastostart automatic rewind. Rope is 4.5 mm
(1122 190 2900)
OIL PUMP:
Automatic, adjustable flow
MAXIMUM ENGINE RPM:
13,500
IDLE RPM:
2,500
IGNITION TIMING:
Fixed
BREAKER POINT SETTING:
none
FLYWHEEL/COIL AIR GAP:
SPARK PLUG TYPE:
NGK BPMR7A, Bosch WSR6F
SPARK PLUG GAP:
0.5 mm (0.020 in.)
CRANKSHAFT MAIN BEARINGS:
Ball
FUEL TANK CAPACITY:
825 ml (27.9 fl. oz.)
FUEL OIL RATIO:
50:1
RECOMMENDED FUEL OCTANE:
Regular automotive. ASPEN2 pre-mixed Alkylate fuel is best
MIX OIL SPECIFICATION:
Stihl 2-cycle. ASPEN synthetic mix oil is best
CHAIN PITCH:
3/8 in. (9.32 mm), optional .404 in.)
CHAIN TYPE:
RSC 3
BAR MOUNT PATTERN:
31 link
SHORTEST GUIDE BAR SUPPLIED:
50 cm (20 in.)
LONGEST GUIDE BAR SUPPLIED:
90 cm (36 in.)
COLOUR SCHEME:
PAINT CODES:
ILLUSTRATED PARTS LIST:
SERVICE MANUAL:

COMMENTS:




 

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