FS 45, FS 46
English
36
Ignition System
Electronic magneto ignition
Fuel System
All position diaphragm carburetor with 
integral fuel pump
Weight
Contact your STIHL dealer for 
information regarding special 
accessories that may be available for 
your product.
Users of this unit should carry out only 
the maintenance operations described 
in this manual. Other repair work may be 
performed only by authorized STIHL 
service shops.
Warranty claims following repairs can be 
accepted only if the repair has been 
performed by an authorized STIHL 
servicing dealer using original STIHL 
replacement parts.
Original STIHL parts can be identified by 
the STIHL part number, the { 
logo and, in some cases, by the STIHL 
parts symbol K. The symbol may 
appear alone on small parts.
Displacement: 1.66 cu. in. 
(27.2 cm
3
)
Bore: 1.34 in. (34 mm)
Stroke: 1, 18 in. (30 mm)
Engine power to 
ISO 8893:
1HP (0.75kW) at 
7,000 rpm
Idle speed: 2,800 rpm
Max. engine speed: 9,500 rpm
Max. output shaft 
speed (cutting 
attachment): 9,500 rpm
Spark plug (resistor 
type):
Bosch WSR 6 F, 
NGK BPMR 7 A
Electrode gap: 0.02 in. (0.5 mm)
Fuel tank capacity: 11.2 fl.oz (0.33 L)
dry, without cutting attachment and 
deflector
FS 45 9.0 lbs (4.1 kg)
FS 46 9.3 lbs. (4.2 kg)
Special Accessories Maintenance and Repairs