MTD 3BA User manual

Two-Stage
Snow Thrower
Model 3BA
PRINTED IN U.S.A.
Operator’s Manual
FORM NO .
769-00747C.fm
(7/29/2004)
IMPORTANT: Read safety rules and instructions carefully before operating equipment.
Warning: This unit is equipped with an internal combustion engine and should not be used on or near any unimproved forest-
covered, brush-covered or grass-covered land unless the engine’s exhaust system is equipped with a spark arrester meeting
applicable local or state laws (if any). If a spark arrester is used, it should be maintained in effective working order by the operator.
In the State of California the above is required by law (Section 4442 of the California Public Resources Code). Other states may have
similar laws. Federal laws apply on federal lands. A spark arrester for the muffler is available through your nearest engine authorized
service dealer or contact the service department, P.O. Box 361131 Cleveland, Ohio 44136-0019.
MTD LLC, P.O. BOX 361131 CLEVELAND, OHIO 44136-0019

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TABLE OF CONTENTS
FINDING MODEL NUMBER
This Operator’s Manual is an important part of your new snow thrower. It will help you assemble, prepare
and maintain the unit for best performance. Please read and understand what it says.
Before you start assembling your new equipment, please locate the model plate on the
equipment and copy the information from it in the space provided below. A sample model plate is
also given below. You can locate the model plate by standing at the operating position and
looking down at the rear of the snow thrower. This information will be necessary to use the
manufacturer’s web site and/or help from the Customer Support Department or an authorized
service dealer.
CUSTOMER SUPPORT
Please do NOT return the unit to the retailer from where it was purchased, without first contacting Customer Support.
If you have difficulty assembling this product or have any questions regarding the controls, operation or
maintenance of this unit, you can seek help from the experts. Choose from the options below:
Visit mtdproducts.com for many useful suggestions. Click on Customer Support button and
you will get the four options reproduced here. Click on the appropriate button and help is
immediately available.
If you prefer to reach a Customer Support Representative, please call 1-800-800-7310.
The engine manufacturer is responsible for all engine-related issues with regards to
performance, power-rating, specifications, warranty and service. Please refer to the engine
manufacturer’s Owner’s/Operator’s Manual, packed separately with your unit, for more
information.
Content Page
Important Safe Operation Practices 3
Assembling Your Snow Thrower 5
Know Your Snow Thrower 7
Operating Your Snow Thrower 8
Making Adjustments 10
Maintaining Your Snow Thrower 11
Servicing Your Snow Thrower 12
Trouble Shooting 14
Illustrated Parts 15
Warranty 20
Content Page
Copy the model number here:
Copy the serial number here:
www.mtdproducts.com
MTD LLC
P. O. BOX 361131
CLEVELAND,OH 44136
330-220-4683
800-800-7310
The answer you are
looking for could be just
a mouse click away!
The answer you are
looking for could be just
a mouse click away!
Engine
Manual

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SECTION 1: IMPORTANT SAFE OPERATION PRACTICES
DANGER: This machine was built to be operated according to the rules for safe operation in this manual. As with
any type of power equipment, carelessness or error on the part of the operator can result in serious injury. This
machine is capable of amputating hands and feet and throwing objects. Failure to observe the following safety
instructions could result in serious injury or death.
Training
1. Read, understand, and follow all instructions on the
machine and in the manual(s) before attempting to
assemble and operate. Keep this manual in a safe place
for future and regular reference and for ordering
replacement parts.
2. Be familiar with all controls and their proper operation.
Know how to stop the machine and disengage them
quickly.
3. Never allow children under 14 years old to operate this
machine. Children 14 years old and over should read and
understand the operation instructions and safety rules in
this manual and should be trained and supervised by a
parent.
4. Never allow adults to operate this machine without
proper instruction.
5. Thrown objects can cause serious personal injury. Plan
your snow-throwing pattern to avoid discharge of material
toward roads, bystanders and the like.
6. Keep bystanders, helpers, pets and children at least 75
feet from the machine while it is in operation. Stop
machine if anyone enters the area.
7. Exercise caution to avoid slipping or falling, especially
when operating in reverse.
Preparation
1. Thoroughly inspect the area where the equipment is to
be used. Remove all doormats, newspapers, sleds,
boards, wires and other foreign objects, which could be
tripped over or thrown by the auger/impeller.
2. Always wear safety glasses or eye shields during
operation and while performing an adjustment or repair to
protect your eyes. Thrown objects which ricochet can
cause serious injury to the eyes.
3. Do not operate without wearing adequate winter outer
garments. Do not wear jewelry, long scarves or other
loose clothing, which could become entangled in moving
parts. Wear footwear which will improve footing on
slippery surfaces.
4. Use a grounded three-wire extension cord and
receptacle for all units with electric start engines.
5. Adjust collector housing height to clear gravel or crushed
rock surfaces.
6. Disengage all control levers before starting the engine.
7. Never attempt to make any adjustments while engine is
running, except where specifically recommended in the
operator’s manual.
8. Let engine and machine adjust to outdoor temperature
before starting to clear snow.
9. To avoid personal injury or property damage use extreme
care in handling gasoline. Gasoline is extremely
flammable and the vapors are explosive. Serious
personal injury can occur when gasoline is spilled on
yourself or your clothes, which can ignite. Wash your skin
and change clothes immediately.
a. Use only an approved gasoline container.
b. Extinguish all cigarettes, cigars, pipes and other
sources of ignition.
c. Never fuel machine indoors.
d. Never remove gas cap or add fuel while the
engine is hot or running.
e. Allow engine to cool at least two minutes before
refueling.
f. Never over fill fuel tank. Fill tank to no more than
½ inch below bottom of filler neck to provide space
for fuel expansion.
g. Replace gasoline cap and tighten securely.
h. If gasoline is spilled, wipe it off the engine and
equipment. Move machine to another area. Wait 5
minutes before starting the engine.
i. Never store the machine or fuel container inside
where there is an open flame, spark or pilot light
(e.g. furnace, water heater, space heater, clothes
dryer etc.).
j. Allow machine to cool at least 5 minutes before
storing.
Operation
1. Do not put hands or feet near rotating parts, in the auger/
impeller housing or chute assembly. Contact with the
rotating parts can amputate hands and feet.
2. The auger/impeller control lever is a safety device. Never
bypass its operation. Doing so makes the machine
unsafe and may cause personal injury.
3. The control levers must operate easily in both directions
and automatically return to the disengaged position when
released.
4. Never operate with a missing or damaged chute
assembly. Keep all safety devices in place and working.
WARNING: This symbol points out important safety instructions which, if not followed, could endanger
the personal safety and/or property of yourself and others. Read and follow all instructions in this manual
before attempting to operate this machine. Failure to comply with these instructions may result in personal
injury. When you see this symbol—heed its warning.
WARNING: Engine Exhaust, some of its constituents, and certain vehicle components contain
or emit chemicals known to State of California to cause cancer and birth defects or other
reproductive harm.

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5. Never run an engine indoors or in a poorly ventilated
area. Engine exhaust contains carbon monoxide, an
odorless and deadly gas.
6. Do not operate machine while under the influence of
alcohol or drugs.
7. Muffler and engine become hot and can cause a burn. Do
not touch.
8. Exercise extreme caution when operating on or crossing
gravel surfaces. Stay alert for hidden hazards or traffic.
9. Exercise caution when changing direction and while
operating on slopes.
10. Plan your snow-throwing pattern to avoid discharge
towards windows, walls, cars etc. Thus, avoiding
possible property damage or personal injury caused by a
ricochet.
11. Never direct discharge at children, bystanders and pets
or allow anyone in front of the machine.
12. Do not overload machine capacity by attempting to clear
snow at too fast of a rate.
13. Never operate this machine without good visibility or
light. Always be sure of your footing and keep a firm hold
on the handles. Walk, never run.
14. Disengage power to the auger/impeller when
transporting or not in use.
15. Never operate machine at high transport speeds on
slippery surfaces. Look down and behind and use care
when backing up.
16. If the machine should start to vibrate abnormally, stop the
engine, disconnect the spark plug wire and ground it
against the engine. Inspect thoroughly for damage.
Repair any damage before starting and operating.
17. Disengage all control levers and stop engine before you
leave the operating position (behind the handles). Wait
until the auger/impeller comes to a complete stop before
unclogging the chute assembly, making any adjustments,
or inspections.
18. Never put your hand in the discharge or collector
openings. Always use the clean-out tool provided to
unclog the discharge opening. Do not unclog chute
assembly while engine is running. Shut off engine and
remain behind handles until all moving parts have
stopped before unclogging.
19. Use only attachments and accessories approved by the
manufacturer (e.g. wheel weights, tire chains, cabs etc.).
20. If situations occur which are not covered in this manual,
use care and good judgment. Contact your dealer or call
1-800-800-7310 for assistance and the name of your
nearest servicing dealer.
Maintenance & Storage
1. Never tamper with safety devices. Check their proper
operation regularly. Refer to the maintenance and
adjustment sections of this manual.
2. Before cleaning, repairing, or inspecting machine
disengage all control levers and stop the engine. Wait
until the auger/impeller come to a complete stop.
Disconnect the spark plug wire and ground against the
engine to prevent unintended starting.
3. Check bolts and screws for proper tightness at frequent
intervals to keep the machine in safe working condition.
Also, visually inspect machine for any damage.
4. Do not change the engine governor setting or over-speed
the engine. The governor controls the maximum safe
operating speed of the engine.
5. Snow thrower shave plates and skid shoes are subject to
wear and damage. For your safety protection, frequently
check all components and replace with original
equipment manufacturer’s (OEM) parts only. “Use of
parts which do not meet the original equipment
specifications may lead to improper performance and
compromise safety!”
6. Check controls periodically to verify they engage and
disengage properly and adjust, if necessary. Refer to the
adjustment section in this operator’s manual for
instructions.
7. Maintain or replace safety and instruction labels, as
necessary.
8. Observe proper disposal laws and regulations for gas,
oil, etc. to protect the environment.
9. Prior to storing, run machine a few minutes to clear snow
from machine and prevent freeze up of auger/impeller.
10. Never store the machine or fuel container inside where
there is an open flame, spark or pilot light such as a water
heater, furnace, clothes dryer etc.
11. Always refer to the operator’s manual for proper
instructions on off-season storage.
Your Responsibility
Restrict the use of this power machine to persons who
read, understand and follow the warnings and
instructions in this manual and on the machine.
Do not modify engine
To avoid serious injury or death, do not modify engine in any
way. Tampering with the governor setting can lead to a
runaway engine and cause it to operate at unsafe speeds.
Never tamper with factory setting of engine governor.
Notice regarding Emissions
Engines which are certified to comply with California and
federal EPA emission regulations for SORE (Small Off Road
Equipment) are certified to operate on regular unleaded
gasoline, and may include the following emission control
systems: Engine Modification (EM) and Three Way Catalyst
(TWC) if so equipped.
DANGER
NEVER PUT HAND IN CHUTE. CONTACT WITH
ROTATING PARTS CAN AMPUTATE FINGERS
AND HANDS.
SHUT OFF ENGINE AND WAIT UNTIL ALL
MOVING PARTS HAVE STOPPED BEFORE
UNCLOGGING.
USE CLEAN-OUT TOOL OR WOODEN STICK TO
UNCLOG CHUTE.

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SECTION 2: ASSEMBLING YOUR SNOW THROWER
IMPORTANT: This unit is shipped with the engine full of
oil. After assembly, see page 8 for fuel and oil details.
Removing From Carton
• Cut the corners of the carton and lay the sides flat
on the ground. Remove all packing inserts.
• Move the snow thrower out of the carton.
• Make certain the carton has been completely
emptied before discarding it.
Before Assembly
NOTE: Reference to right, left, front or rear of the unit is
from the operating position unless otherwise stated.
• Cut the cable tie that secures the upper handle to
the chute assembly for shipping purposes.
Setting Up The Handle
• Loosen the chute knob on the upper chute and
pivot the upper chute upwards as far as it will go.
Follow the direction of the arrow in Figure 1.
Figure 1
• Loosen the handle knob, saddle washer and
handle tab on each side of the handle. See Figure
2.
Figure 2
• Hold both controls against the upper handle and
pull up as shown in Figure 3. Make sure that the
upper handle locks over the lower handle and the
handle tabs align with the handle. You may have to
carefully maneuver the upper handle to clear the
chute assembly.
CAUTION: Be careful not to bend or kink the cables.
Figure 3
• Tighten the handle knobs on each side of the
handle. Refer to Figure 2.
• Rotate the chute by the chute handle to the desired
operating position.
• Tighten the chute knob on the upper chute making
sure the flat washer and the carriage bolt are
correctly positioned. Refer to Figure 1.
Clean-Out Tool
This tool and the electric extension cord, if so equipped,
may be fastened with a cable tie to the rear of the auger
housing for shipping purposes. In that case, cut the
cable tie and remove the extension cord now.
WARNING: Do not lift the snow thrower by
the chute handle.
Chute Handle*
Chute Knob
* Meant only to rotate the chute
Upper Chute
Hex Bolt
Handle Tab
Handle
Knob
Saddle
Washer
Initial position of
Upper Handle
Final position of
Upper Handle