Stihl Br 420 C Manual

Instruction Manual    
Manual de instrucciones
Warning!
For safe operation follow all safety 
precautions in Instruction Manual - improper 
use can cause serious injury.
Advertencia!
Para su seguridad durante el manejo de este 
producto, siga siempre las precauciones de 
seguridad dadas en el manual de 
instrucciones - el uso indebido puede causar 
lesiones graves.
STIHL BR 340, 420
BA_BR340_30_U_D3.book  Seite 0  Donnerstag, 27. März 2003  11:49 11 

1
BR 340, BR 340 L, BR 420, BR 420 C English / USA
BA_SE_003_004_01_09.fm
Printed on chlorine-free paper.
Printing inks contain vegetable oils; paper can be recycled.
© ANDREAS STIHL AG & Co. KG, 2005 
0458 373 3021 B
. M2. L5.  CP . Prin ted  in US A 
STIHlContentsGuide to Using this Manual  ..............  2
Safety Precautions  ...........................  3
Assembling the Blower  ...................  12
Fuel ................................................  14
Fueling...

2 English / USA
BR 340, BR 340 L, BR 420, BR 420 CPictogramsAll the pictograms attached to the 
machine are shown and explained in  
this manual.
The operating and handling instructions 
are supported by illustrations.Symbols in textThe individual steps or procedures 
described in the manual may be marked 
in different ways:
:A bullet marks a step or procedure 
without direct reference to an 
illustration. 
A description of a step or procedure that 
refers directly to an illustration may 
contain item...

3 BR 340, BR 340 L, BR 420, BR 420 CEnglish / USA
Warning!
The use of any blower 
may be dangerous. It is 
important that you read, 
fully understand and 
observe the following safety 
precautions.
!
Warning!
Reread the owner`s 
manual and the safety 
instructions peri-
odically.
Do not lend or rent your machine without 
the owner`s manual.
Be sure that anyone using your unit 
understands the information contained 
in this manual.
!
Warning!
Careless or improper use of the machine 
may cause serious...

4 English / USA
BR 340, BR 340 L, BR 420, BR 420 C Proper Clothing !
Warning!
To reduce the risk of injury, the operator 
should wear proper protective apparel.
Clothing must be sturdy and snug-fitting, 
but allow complete freedom of move-
ment.
!
Warning!
Avoid loose-fitting jackets, 
flared or cuffed pants, 
scarfs, unconfined long 
hair or anything that could 
be drawn into the air 
intake. 
Use of gloves when 
working with the blower is 
recommended. 
Good footing is most 
important. Wear sturdy...

5 BR 340, BR 340 L, BR 420, BR 420 CEnglish / USA
!
Warning!
Proper eye protection is a must. Even 
though the discharge is directed away 
from the operator, ricochets and bounce 
backs can occur during blower 
operations.
Never operate a blower 
unless wearing goggles
or properly fitted safety 
glasses with adequate
 top and side protection 
which comply with 
ANSI Z 87.1 (or your applicable national 
standard).
Fellow workers must also wear personal 
protective equipment.
!
Warning!
Blower noise may...

6 English / USA
BR 340, BR 340 L, BR 420, BR 420 C!
Warning!
Gasoline is an extremely 
flammable fuel. If spilled 
or ignited by a spark or 
other ignition source, it 
can cause fire and serious 
burn injury or property 
damage.
!
Warning!
To reduce the risk of serious injury from 
burns, never attempt to refuel the unit 
until it has been completely removed 
from the operator.
Use extreme caution when handling 
gasoline or fuel mix. 
Do not smoke or bring any fire or flame 
near the fuel.Fueling...

7 BR 340, BR 340 L, BR 420, BR 420 CEnglish / USA
Before Starting 
!
Warning!
Never operate your machine if it is 
damaged, improperly adjusted or not 
completely and securely assembled.
You should always inspect your unit 
before starting it. Make sure the controls 
and safety devices are working properly.
!
Warning!
To reduce the risk of injury from thrown 
parts, check your fanwheel and fan 
housing for damage (cracks, nicks, 
chipping). If any damage is found, stop 
using the unit and contact your...

8 English / USA
BR 340, BR 340 L, BR 420, BR 420 C Muffler and Catalytic Converter!
Warning!
The muffler and other parts of the engine 
(e.g. fins of the cylinder, spark plug) 
become hot during operation and remain 
hot for a while after stopping the engine. 
To reduce risk of burns do not touch the 
muffler and other parts while they are 
hot. 
!
Warning!
To reduce the risk of fire or burn injury, 
let the unit cool down before refueling 
your power tool after use.
!
Warning!
Never disassemble or...

9 BR 340, BR 340 L, BR 420, BR 420 CEnglish / USA
Working instructions
Work carefully. 
When working with the blower, always 
wear it on your back using the carrying 
harness. Wrap your fingers tightly 
around the handle, keeping the control 
handle cradled between your thumb and 
forefinger. Keep your hand in this 
position to have your machine under 
control at all times. 
Make sure your control handle (and grip 
for vacuum attachment) are in good 
condition and free of moisture, pitch, oil 
or...