BT 121
English
24
This spark ignition system meets all
requrements of the Canadian
Interference-Causing Equipment
Regulations ICES-002.
Fuel System
All position diaphragm carburetor with
integral fuel pump
Drilling Gear
Two-stage spur gear drive
Weight
Dimensions
Earth augers
Planting auger
Planting hole auger
Other special accessories
Contact your STIHL dealer for more
information on these and other special
accessories.
Users of this machine may only carry out
the maintenance and service work
described in this user manual. All other
repairs must be carried out by a
servicing dealer.
STIHL recommends that you have
servicing and repair work carried out
exclusively by an authorized STIHL
servicing dealer. STIHL dealers are
regularly given the opportunity to attend
training courses and are supplied with
the necessary technical information.
When repairing the machine, only use
replacement parts which have been
approved by STIHL for this power tool or
are technically identical. Only use high-
quality replacement parts in order to
avoid the risk of accidents and damage
to the machine.
STIHL recommends the use of original
STIHL replacement parts.
Original STIHL parts can be identified by
the STIHL part number, the
{
logo and the STIHL parts symbol
K
(the symbol may appear alone on small
parts).
Fuel tank capacity:
0.64 l
Gear ratio:
47,5 : 1
Max. spindle speed: 190 rpm
Max. torque at drilling
spindle:
79 Nm
Lubrication:
STIHL gear lubri-
cant for
brushcutters
Dry, without drilling
tool (auger):
9.4 kg
Length with handle
frame:
400 mm
Width with handle
frame:
530 mm
Height without drilling
tool (auger):
340 mm
Special Accessories
Diameter:
40, 60, 90, 120,
150, 200 mm
Length:
695 mm
Diameter:
150 mm
Length:
525 mm
Diameter:
260 mm
Length:
660 mm
Shaft extension:
250, 450 mm
Chuck for spiral drills: Diameters up to
13 mm
Maintenance and Repairs