STIHL BG 45 Owner's Manual
STIHL BG 45
Instruction Manual
Owner's Manual
Manual de instrucciones
Manual del usuario
..
Contents
english / USA
Parts and Controls ............................ 2
Safety Precautions ........................... 4
Assembling the Blower ................... 10
Fuel ................................................ 11
Fueling ............................................ 11
Starting / Stopping .......................... 12
Using the Blower ............................ 14
Cleaning the Air Filter ..................... 15
Adjusting the Carburetor ................ 16
Checking the Spark Plug ................ 17
Engine Running Behavior ............... 18
Rewind Starter ................................ 18
Operating Instructions .................... 19
Storing the Machine ........................ 19
Maintenance Chart ......................... 20
Maintenance and Repairs ............... 21
Key to Symbols .............................. 21
Special Accessories ....................... 21
Specifications ................................. 22
STIHL Incorporated Federal and
California Emission Control
Warranty Statement ........................ 23
This manual contains warnings,
operating and safety precautions for the
STIHL BG 45 blower.
Pay special attention to the safety
precautions outlined on pages 4 to 9.
Allow only persons who understand this
Manual to operate your blower.
To receive maximum performance and
satisfaction from your STIHL blower, it is
important that you read and understand
the maintenance and safety precautions
before using your blower.
Contact your STIHL dealer or the STIHL
distributor for your area if you do not
understand any of the instructions in this
Manual.
!Warning!
Because a blower is a high-speed tool,
some special safety precautions must
be observed as with any other power
tool to reduce the risk of personal injury.
Careless or improper use may cause
serious or even fatal injury.
STIHL's philosophy is to continually
improve all of its products. As a result,
engineering changes and improvements
are made from time-to-time. If the
operating characteristics or the
appearance of your blower differs from
those described in this Manual, please
contact your STIHL dealer for
informations and assistance.
Printed on clorine-free paper
© 2000 Andreas Stihl AG & Co., Waiblingen
0458 294 3021. M1,5. C0. PM. Printed in USA
STIHl
1BG 45
english / USA
Part
s and Controls
2
1
3
7
6
9
5
8
10
4
11
13
14
15
1 Ta b
2 Interlock button
3 Spark plug boot
4 Muffler
5 Sta rter grip
6 Carburetor adjusting screw
7 Choke lever
8 Fuel pump
16
9 Filter housing
10 Fuel filler cap
11 Fuel tank
12 Assist handle
13 Control handle
14 Switch
15 Throttle trigger
16 Blower tube
12
17
294BA001 KN
17 Round nozzle
2
BG 45
Definitions
1. Tab.
Designed to secure the blower tube
to the machine.
2. Interlock Button.
To position the throttle trigger.
3. Spark Plug Boot.
Connects the spark plug to the
ignition wire.
4. Muffler.
Attenuates exhaust noises and
diverts exhaust gases away from
operator.
5. Starter Grip.
The grip of the pull starter, which is
the device to start the engine.
6. Carburetor Adjusting Screws.
For tuning carburetor.
7. Choke Lever.
Eases engine starting by enriching
mixture.
8. Fuel Pump.
Provides additional fuel feed for a
cold start.
9. Filter Housing.
Covers the air filter element.
english / USA
10. Fuel Filler Cap.
For closing the fuel tank.
11. Fuel Tank.
For fuel and oil mixture.
12. Assist Handle.
Addition handle for use of the
blower tube as a blower and held by
the left hand.
13. Control Handle.
The handle of the blower held by the
right hand.
14. Switch.
Run and stop switch.
15. Throttle Trigger.
Controls the speed of the engine.
16. Blower Tube.
Directs airstream.
17. Round Nozzle.
To be mounted on the blower tube to
aim the air stream.
3BG 45
english / USA
Safety Precautions
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.
!Warning!
Careless or improper use of the machine
may cause serious injury. Have your
STIHL Dealer show you how to operate
your blower. Observe all applicable
local safety regulations, standards and
ordinances.
!Warning!
Minors should never be allowed to use a
blower : Bystanders, especially children,
and animals should not be allowed in the
area where a machine is in use.
Never let the unit run unattended. 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.
Most of these safety precautions and
warnings apply to the use of all STIHL
blowers. Different models may have
different parts and controls.
See the appropriate section of your
owner`s manual for a description of the
controls and function of the parts of your
machine.
Safe use of a blower involves
1. the operator
2. the blower
3. the use of the blower .
THE OPERATOR
Physical Condition
You must be in good physical condition
and mental health and not under the
influence of any substance (drugs,
alcohol, etc.) which might impair vision,
dexterity or judgment. Do not operate a
blower when you are fatigued .
Be alert - if you get tired while operating
your machine, take a break. Tiredness
may result in loss of control. Working
with any blower can be strenuous. If you
have any condition that might be
vated by strenuous work, check
aggra
with
your doctor before operating the
machine.
!Warning!
Prolonged use of a blower, (or other
machines) exposing the operator to
vibrations may produce whitefinger
disease (Raynaud`s phenomenon) or
carpal tunnel syndrome. These conditions reduce the hand`s ability to feel
and regulate temperature, produce
numbness and burning sensations and
may cause nerve and circulation
damage and tissue necrosis.
!Warning!
The STIHL blower is not equipped with
an antivibration (AV) system. Other
STIHL blower models are available with
an AV system designed to reduce the
transmission of engine vibrations to the
operator's hands. An AV system is
recommended for those operators who
use blowers on a regular or sustained
basis.
Antivibration systems do not guarantee
that you will not sustain whitefinger
disease or carpal tunnel syndrome.
Therefore, continual and regular users
should monitor closely the condition of
their hands and fingers. If any of the
above symptoms appear, seek medical
advice immediately.
4
BG 45
Proper Clothing
Clothing must be sturdy and snug-fitting,
but allow complete freedom of movement.
!Warning!
Avoid loose-fitting jackets, flared or
cuffed pants, scarfs, unconfined long
hair or anything that could be drawn into
the air intake.
Wear overalls or long
pants to protect your legs.
Do not wear shorts.
Use of gloves when
working with the blower is
recommended.
Good footing is most
important. Wear sturdy
shoes with nonslip soles.
!Warning!
To reduce the risk of injury associated
with the inhalation of dust, use a face
filter mask when using your blower in
dusty conditions.
!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).
!Warning!
Blower noise may damage your hearing.
Wear sound barriers (ear plugs or ear
mufflers) to protect your hearing. Continual and regular users should have their
hearing checked regulary.
THE BLOWER
For illustrations and definitions of the
blower parts see the chapter on "Parts
and Controls"!
english / USA
!Warning!
Never modify a blower in any way. Only
attachments supplied by STIHL or
expressly approved by STIHL for use
with the specific STIHL blower models
are authorized. Although certain
unauthorized attachment are useable for
the STIHL blower, their use may be
extremely dangerous.
THE USE OF THE BLOWER
Transport
Always turn off the engine before putting
down blower. When transporting your
unit in a vehicle, properly secure it to
prevent turnover, fuel spillage and
damage to the machine.
Fueling
This STIHL unit uses an oil-gasoline
mixture for fuel (see the chapter on
"Fuel" of your owner`s manual).
!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.
5BG 45
english / USA
Use extreme caution when handling
gasoline or fuel mix.
Do not smoke or bring any fire or flame
near the fuel.
Fueling instructions
Fuel your machine in well-ventilated
areas, outdoors only. Always shut off the
engine and allow it to cool before
refueling. Relieve fuel tank pressure by
loosening fuel cap slowly. Never remove
fuel filler cap while engine is running.
Select bare ground for fueling and move
at least 10 feet (3 m) from the fueling
spot before starting the engine.
Wipe off any spilled fuel before starting
your blower and check for leakage.
Always tighten fuel filler cap securely
after fueling.
!Warning!
Check for fuel leakage while refueling
and during operation. If fuel or oil
leakage is found, do not start or run the
engine until leak is fixed and spilled fuel
has been wiped away. Take care not to
get fuel on your clothing. If this happens,
change your clothing immediately.
Always store gasoline in approved
container.
!Warning!
Unit vibrations can cause an improperly
tightened fuel cap to loosen or come off
and spill quantities of fuel.
In order to reduce risk of
fuel spillage and fire,
tighten fuel cap by hand
with as much force as
possible.
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 STIHL
dealer for repair.
: Throttle trigger must move freely
and spring back to idle position
when released.
: Stop switch must move easily to $
: Tightness of spark plug boot - if boot
is loose, sparks may occur and
ignite the escaping fuel vapor!
Starting
!Warning!
Your blower is a one-person machine.
To reduce the risk of eye or other injury
from thrown objects, insure that bystanders are at least 50 feet (15m) away
during use.
Stop the engine immediately if you are
approached.
For specific starting instructions, see the
appropriate section of your owner`s
manual. Place the machine on firm
ground or other solid surface in an open
area. Maintain good balance and secure
footing.
!Warning!
When you pull the starter grip, don`t
wrap the starter rope around your hand.
Do not allow the grip to snap back, but
guide the starter rope slowly back to
permit the rope to rewind properly.
6
BG 45
Failure to follow this procedure may
result in injury to hand or fingers and
may damage the starter mechanism.
Working instructions
Work carefully.
Operate the blower under good visibility
and daylight conditions only.
!Warning!
Your blower produces
poisonous exhaust fumes
as soon as the combustible engine is running.
These gases (e.g. carbon
monoxide) may be color-
less and odorless.
To reduce the risk of serious or fatal
injury from breathing toxic fumes, never
start or run the blower indoors or in
poorly ventilated locations. Ensure
proper ventilation when working in
trenches or other confined areas.
Keep the space behind and beside the
engine clear at all times to allow for the
escape of hot and toxic exhaust fumes.
When working with a handheld blower,
always carry it with the muffler away
from you to reduce the risk of burns from
contact with the hot muffler or hot
exhaust fumes.
!Warning!
Use of this product can generate dust,
mists, and fumes containing chemicals
known to cause respiratory disease,
cancer, birth defects, or other reproductive harm. If you are unfamiliar with the
risks associated with the particular dust,
mists or fumes at issue, consult your
employer, governmental agencies such
as OSHA and NIOSH and other sources
on hazardous materials. If the substance
being blown or vacuumed is a commercial substance, review the material
safety data sheet for that substance and
/ or consult the material manufacturer /
supplier. The state of California and
some other authorities, for instance,
have published lists of substances
known to cause cancer, reproductive
toxicity, etc.
Control dust, mist and fumes at the
source where possible. In this regard
use good work practices and follow the
recommendations of OSHA / NIOSH
and occupational and trade associations. When the inhalation of toxic dust,
mists and fumes cannot be eliminated,
the operator and any bystanders should
always wear a respirator approved by
NIOSH / MSHA for the substance at
issue.
english / USA
!Warning!
Dust with silica in its composition may
contain crystalline silica. Silica is a basic
component of sand, quartz, brick, clay,
granite and numerous other minerals
and rocks, including masonry and concrete products. Repeated and / or substantial inhalation of airborne crystalline
silica can cause serious or fatal respiratory disease, including silicosis. In addition, the state of California and some
other authorities have listed respirable
crystalline silica as a substance known
to cause cancer. When encountering
such materials, always follow the respiratory precautions mentioned above.
!Warning!
Breathing asbestos dust is dangerous
and can cause severe or fatal injury, respiratory illness or cancer. The use and
disposal of asbestos containing
have been strictly regulated by OSHA
and the Environmental Protection
Agency. Do not blow or disturb asbestos
or asbestos containing products, such
as asbestos insulation. If you have any
reason to believe that you might be
disturbing asbestos, immediately
your employer or a local OSHA
representative.
products
contact
7BG 45
english / USA
When working with the blower, always
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 grease.
!Warning!
To reduce the risk of personal injury, do
not direct air blast towards bystanders,
since the high pressure of the air flow
could injure eyes and could blow small
objects at great speed.
The blower fan between the air intake
and output openings rotates whenever
the engine is running. In order to reduce
the risk of injury from contact with the
fan, never operate your unit without a
properly mounted intake screen and
blower tube. Never insert any foreign
object into the air intake or output
openings of the machine.
Pay attention to the direction of the wind,
i.e., do not work against the wind.
To reduce the risk of stumbling and loss
of control,do not walk backward while
operating the machine.
000 LA
A
326B
MAINTENANCE, REPAIR AND STORING
Maintenance, replacement, or repair
of the emission control devices and
systems may be performed by any
nonroad engine repair establishment
or individual. However if you claim
warranty for a component which has
not been serviced or maintained properly or if nonapproved replacement
parts were used, STIHL may deny
warranty.
Use only identical STIHL replacement
parts for maintenance and repair.
Use of parts manufactured by others
may cause serious or fatal injury.
Follow the maintenance and repair
instructions in the appropriate section of
your owner's manual. Refer to the
maintenance chart at the last pages of
this manual.
!Warning!
Always shut off the engine before
cleaning or servicing the unit or
replacing parts.
8
BG 45
english / USA
!Warning!
Always stop the engine and make sure
that the fan is stopped before doing any
maintenance or repair work or cleaning
the blower. Do not attempt any maintenance or repair work not described in
your owner's manual. Have such work
performed at your STIHL service shop
only.
Check fuel filler cap for leaks at regular
intervals. Use the specified spark plug
and make sure it and the ignition lead
are always in good condition.
!Warning!
A worn or damaged muffler is a fire
hazard and may cause loss of hearing.
Check to see that the muffler is in good
condition. The blower must not be
ted if the muffler is not functioning properly or has been removed.
Remember that the risk of forest fires is
greater in hot weather. Use the spark
arresting muffler supplied with the unit.
Never touch a hot muffler or burn will
result.
opera-
!Warning!
In order to reduce the risk of fire, do not
modify or remove any part of the muffler
or spark arrestor.
Keep spark plug and wire connection
tight and clean. The spark plug electrode
gap should be checked with a feeler
gauge at least every 50 operating hours
and reset if necessary. Fit a new spark
plug if the electrodes are badly pitted.
For any maintenance please refer to the
maintenance chart and to the warranty
statement near the end of this manual.
Store blower in a dry, high or locked
location place and out of reach of
children.
Before storing for longer than a few
days, always empty the fuel tank.
9BG 45
english / USA
Assembling the Blower
6
3
2
: Push the blower tube (1) with lug (2)
into the fan housing stub (3) and
rotate it in the direction of the arrow
to lock in position.
1
1
5
295BA003 KN
: Push nozzle (4) as onto the blower
tube (1) as far as lug (5), position a
(long) or position b (short), and
rotate it in the direction of the arrow
to lock in position.
3
4
a
b
295BA004 KN
Removing blower tube
: Use a suitable tool to lift the
tab (6) on the fan housing stub (3).
Rotate the blower tube in the
direction of the arrow and then pull it
out.
295BA005 KN
10
BG 45
Fuel
english / USA
Fueling
This engine is certified to operate on
unleaded gasoline and with the mix ratio
50:1.
Your two-stroke engine requires a
mixture of brand-name gasoline and
quality two-stroke engine oil with the
classification TC.
Use regular branded unleaded gasoline
with a minimum octane rating of 89
RON. If the octane number of the regular
grade gasoline in your area is lower use
premium unleaded fuel.
Fuel with a lower octane number may
result in preignition (causing "pinging")
which is accompanied by an increase in
engine temperature. This, in turn,
increases the risk of the piston seizure
and damage to the engine.
The chemical composition of the fuel is
also important. Some fuel additives not
only detrimentally affect elastomers
(carburetor diaphragms, oil seals, fuel
lines etc.), but magnesium castings as
well. This could cause running problems
or even damage the engine. For this
reason it is essential that you use only
name branded fuels!
Use only STIHL two-stroke engine oil or
equivalent branded two-stroke aircooled engine oils with the classification
TC for mixing.
We recommend STIHL 50:1 two-stroke
engine oil since it is specially formulated
for use in STIHL engines.
Do not use BIA or TCW (two-stroke
water cooled) mix oils!
Take care when handling gasoline.
Avoid direct contact with the skin and
avoid inhaling fuel vapour.
The canister should be kept tightly
closed in order to avoid any moisture
getting into the mixture.
The fuel tank and the canister in which
fuel mix is stored should be cleaned
from time to time.
Fuel mix ages
Only mix sufficient fuel for a few days
work, not to exceed 3 months of storage.
Store in approved safety fuel-canisters
only. When mixing, pour oil into the
canister first, and then add gasoline.
Gasoline
US gal. US fl.oz
12.6
2 1/2 6.4
5 12.8
Oil (STIHL 50:1 or
equivalent branded TC oils)
295BA035 KN
Before fueling, clean the filler cap and
the area around it to ensure that no dirt
falls into the tank.
Always thoroughly shake the mixture in
the canister before fueling your
machine.
!Warning!
In order to reduce the risk of burns or
other personal injury from escaping gas
vapor and fumes, remove the fuel filler
cap carefully so as to allow any pressure
build-up in the tank to release slowly.
!Warning!
After fueling, tighten fuel cap
as securely as possible by hand.
Dispose empty mixing-oil canisters only
at authorized disposal locations.
11BG 45
english / USA
Change the fuel pick up body every year.
Before storing your machine for a long
period, drain and clean the fuel tank and
run engine until carburetor is dry.
Starting / Stopping
1
3
Observe safety precautions - see
chapter “Safety Precautions”.
Start as follows:
: Set switch (1) to position
: Squeeze the throttle trigger (2) and
press in the interlock button (3) at
295BA034 KN
the same time.
: Release the throttle trigger.
: Release the interlock button, this is
the starting throttle position.
Note:
The interlock button enables the throttle
trigger to be locked in the full throttle
position.
2
6
295BA013 KN
I
Set the choke lever (5):
For cold start to g
For warm start to e
: Press fuel pump bulb (6) at least five
times.
5
295BA015 KN
12
BG 45
english / USA
: Place the unit on the ground.
: Make sure you have a firm footing:
Hold the unit firmly on the ground
with your left hand on the handle
and press down.
: Pull the starter grip slowly with your
right hand until you feel it engage
and then give it a brisk strong pull.
Do not pull out the starter rope all
the way - it might break.
: Do not let the starter grip snap back.
Guide it slowly back into the housing
so that it can rewind properly.
5
If the engine is cold:
(choke position gggg)
: Pull the starter rope five times.
295BA016 KN
: Move the choke lever (5) to e
: Continue cranking until engine runs.
Note: If the engine does not start
after 10 pulls with the choke lever
set to e :
Set choke to gggg , pull the starter
rope five times, set choke to e and
continue cranking.
If engine is warm:
: Continue cranking until engine runs
(choke lever to e )
295BA043 KN
As soon as engine runs
: Blip the throttle trigger so that
interlock button pops out and the
engine settles down to idle speed.
If the engine stops during warm-up or
acceleration:
: Repeat starting procedure as
described under “If engine is cold”
Your unit is now ready for operation.
13BG 45
english / USA
Using the Blower
To stop the engine:
: Move switch to position O
Additional hints on starting
- If the engine does not start:
: Make sure all settings are correct
(choke shutter, throttle trigger
in starting throttle position, stop
switch to I)
: Repeat the starting procedure
7
- If the engine still does not start:
: Move switch to O
: Pull off the spark plug boot (7).
: Unscrew and dry off the spark plug.
: Open throttle wide.
: Crank the engine several times with
the starter to clear the combustion
chamber.
: Refit the spark plug and connect the
spark plug boot - push it down firmly.
: Move switch to I
: Set choke lever to e -
even if the engine is cold.
: Now start the engine.
6
295BA017 KN
Fuel tank run until dry and then refueled
: Press the fuel pump bulb (6) at least
five times - bulb must be filled with
fuel.
: Now start the engine.
Your blower is designed for one-handed
operation. It can be carried by the
control handle in either the right or left
hand.
The nozzles supplied enable you to
carry out a wide variety of clean-up jobs.
The round nozzle* is particularly suitable
for use on uneven surfaces (e.g. fields
and lawns).
The fan nozzle* produces a broad and
powerful airstream at ground level. It can
be aimed and controlled very accurately.
This nozzle is highly effective for blow-
295BA018 KN
sweeping sawdust, leaves, grass
cuttings, etc. on flat surfaces.
326BA033 LA
14
* see chapter “Key to Symbols“
BG 45
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