Husqvarna HH 389MPC User manual

HH163MP, HH196MP, HH196OB, HH212OB, HH270MP,
HH270OB, HH389MP, HH 389MPC, HH389OB
EN Operator's manual 2-17
ES Manual de usuario 18-35
PT-BR Manual do operador 36-53

Contents
Introduction..............................................2
Safety...................................................... 5
Assembly.................................................6
Operation.................................................7
Maintenance............................................9
Troubleshooting.....................................13
Transportation, storage and disposal.... 14
Technical data....................................... 15
Introduction
Engine overview
1
6
13
11
8
10
14
12
15
4
7
3
2
9
5
1. Muffler
2. Spark plug
3. Air filter
4. Choke control
5. Fuel valve lever
6. Throttle control
7. Recoil starter
8. Starter rope handle
9. Fuel tank cap
10. Fuel tank
11. Engine ON/OFF switch
12. Serial number
13. Drain plug for engine oil
14. Oil tank cap and dipstick
15. Operator's manual
21537 - 003 - 18.11.2022

Engine overview (HH212OB)
1
2
3
13
4
11
12 14
15
6
5
8
9
10
7
16
1. Exhaust pipe
2. Ignition cable
3. Air filter
4. Choke control
5. Fuel valve lever
6. Throttle control
7. Recoil starter
8. Starter rope handle
9. Fuel tank
10. Fuel tank cap
11. Engine ON/OFF switch
12. Drain plug for engine oil
13. Serial number
14. Oil tank cap and dipstick
15. Spark plug
16. Operator's manual
Product description
This engine is a 4-stroke combustion engine.
Intended use
The engine must only be used outdoors or in areas with
sufficient airflow.
Choke control
The choke control opens and closes the choke valve in the
carburetor. The choke control position (A) is used during
start of a cold engine.
A
The choke control position (B) is used after start of a cold
engine and during start of a warm engine.
B
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Fuel valve
The fuel valve opens and closes the flow of fuel between
the fuel tank and the carburetor. When the fuel valve lever
is in position (A), the fuel valve is open.
A
When the fuel valve lever is in position (B), the fuel valve is
closed.
B
Throttle control
The throttle control (A) sets the engine speed. The position
to the far right is the highest speed. The position to the far
left is the lowest speed.
A
Serial number
Refer to Engine overview on page 2 for the position of
the serial number. Supply the model name and the serial
number when you send an order for spare parts.
Symbols on the product
WARNING! This product can be dangerous
and cause serious injury or death to the
operator or others. Be careful and use the
product correctly.
Read the operator's manual carefully
and make sure that you understand the
instructions before use.
Choke.
Fuel valve.
High engine speed.
Low engine speed.
Engine oil.
Risk of fire.
Do not breathe in exhaust fumes. The
exhaust fumes from the engine contain
carbon monoxide, an odorless, poisonous
and very dangerous gas. Do not start the
engine indoors or in closed spaces.
Hot surface.
Note: Other symbols/decals on the engine refer to
certification requirements for some commercial areas.
Product liability
As referred to in the product liability laws, we are not liable
for damages that our product causes if:
• the product is incorrectly repaired.
• the product is repaired with parts that are not from the
manufacturer or not approved by the manufacturer.
• the product has an accessory that is not from the
manufacturer or not approved by the manufacturer.
• the product is not repaired at an approved service
center or by an approved authority.
41537 - 003 - 18.11.2022

Safety
Safety definitions
Warnings, cautions and notes are used to point out
specially important parts of the manual.
WARNING: Used if there is a risk of injury
or death for the operator or bystanders if the
instructions in the manual are not obeyed.
CAUTION: Used if there is a risk of damage to the
product, other materials or the adjacent area if the
instructions in the manual are not obeyed.
Note: Used to give more information that is necessary in a
given situation.
General safety instructions
WARNING: Read the warning instructions that
follow before you use the engine.
• The engine is dangerous if you are not careful or if you
use the engine incorrectly. There is a risk of injury or
death, or damage to the engine. Before you use the
engine, you must read and understand the contents of
this operator’s manual.
• You must read and understand the operator’s manual
for the product that uses this engine. There can be
more safety instructions for start, stop, operation and
maintenance.
• Save all warnings and instructions.
• Do not let a person operate the engine unless they
read and understand the contents of the operator's
manual.
• Do not let a child operate the engine.
• Do not do modifications to the engine.
Safety instructions for operation
WARNING: Read the warning instructions that
follow before you use the engine.
• Make sure that you know how to stop the engine
quickly in an emergency.
• The exhaust fumes from the engine contain carbon
monoxide which is an odorless, poisonous and very
dangerous gas.
• Do not use a combustion engine product indoors or in
areas that do not have sufficient airflow.
• Do not use the engine in areas where fire or
explosions can occur.
Safety devices on the product
WARNING: Read the warning instructions that
follow before you use the product.
• Do not use a product with defective safety devices.
• Do a check of the safety devices regularly. If the
safety devices are defective, speak to your Husqvarna
service agent.
• Do not make modifications to safety devices.
Engine ON/OFF switch
The engine can only start when the engine ON/OFF switch
is set to "ON". The engine stops when you set the engine
ON/OFF switch to "OFF".
To do a check of the engine ON/OFF switch
1. Start the engine. Refer to To start the engine on page
8 .
2. Set the engine ON/OFF switch to "OFF". The engine
stops.
Muffler
The muffler keeps the noise levels to a minimum and
sends the exhaust fumes away from the operator.
Do not use the product if the muffler is missing or
defective. A defective muffler increases the noise level and
the risk of fire.
WARNING: The muffler becomes very hot during
and after use and when the engine operates at
idle speed. Be careful near flammable materials
and/or fumes to prevent fire.
To do a check of the muffler
• Examine the muffler regularly to make sure that it is
attached correctly and not damaged.
Fuel safety
WARNING: Read the warning instructions that
follow before you use the product.
• Fuel is flammable and the fumes are explosive. Be
careful with fuel to prevent injury, fire and explosion.
• Do not breathe in the fuel fumes. The fuel fumes are
poisonous and can cause injury. Make sure that the
airflow is sufficient.
• Do not remove the fuel tank cap or fill the fuel tank
when the engine is on.
• Make sure that the engine is cool before you refuel.
• Do not fill fuel in an indoor area. Insufficient airflow
can cause injury or death because of asphyxiation or
carbon monoxide poisoning.
• Do not smoke near the fuel or the engine.
• Do not put hot objects near the fuel or the engine.
• Do not fill fuel near sparks or flames.
• Before you refuel, open the fuel tank cap slowly and
release the pressure carefully.
• Fuel on your skin can cause injury. If you get fuel on
your skin, use soap and water to remove the fuel.
• If you spill fuel on your clothing, change clothing
immediately.
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• Do not fill the fuel tank fully. Heat causes the fuel to
expand. Keep a space at the top of the fuel tank.
• Tighten the fuel tank cap fully. If the fuel tank cap is
not tightened, there is a risk of fire.
• Before you start the product, move the product to a
minimum of 3 m/10 ft from where you refueled.
• Do not start the product if there is fuel or engine oil on
the product. Remove the unwanted fuel and engine oil
and let the product dry before you start the engine.
• Examine the engine for leaks regularly. If there are
leaks in the fuel system, do not start the engine until
the leaks are repaired.
• Do not use your fingers to examine the engine for
leaks.
• Keep fuel in approved containers only.
• When the product and fuel is in storage, make sure
that fuel and fuel fumes cannot cause damage.
• Drain the fuel in an approved container outdoors and
away from sparks and flames.
Safety instructions for maintenance
WARNING: Read the warning instructions that
follow before you do maintenance on the engine.
• If the maintenance is not done correctly and regularly,
the risk of injury and damage to the engine increases.
• Stop the engine and make sure that all parts are cool
before you do the maintenance.
• Disconnect the spark plug cap before you do the
maintenance.
• The exhaust fumes from the engine are hot and can
contain sparks. Do not operate the engine in indoor
areas or near flammable material.
• Always use original spare parts. Spare parts that are
not approved by the manufacturer, can cause serious
injury or death.
• Only do the maintenance as given in this operator's
manual. Let an approved service center do all other
servicing.
• Let an approved service center do servicing on the
engine regularly.
Assembly
External throttle control and choke control
The throttle control and choke controls have holes for
installation of cables for optional external controls. The
illustrations show installation examples for a solid wire
cable and for a flexible wire cable.
• If a flexible wire cable is installed, it is necessary to
add a return spring.
• It is necessary to loosen the friction nut for the throttle
control if the throttle is operated with an external
throttle control.
External throttle control assembly
HH163MP, HH196MP, HH196OB, HH212OB:
1
2
3
4
5
9
6
7
8
61537 - 003 - 18.11.2022

HH270MP, HH270OB, HH389MP, HH 389MPC,
HH389OB:
1
2
3
4
5
6
7
9
8
1. Flexible wire
2. Solid wire
3. Wire
4. 4 mm screw (optional)
5. Wire holder (optional)
6. Throttle lever (optional)
7. 5 mm snap ring
8. Friction nut for the throttle lever
9. Return spring
External choke control assembly
HH163MP, HH196MP, HH196OB, HH212OB:
A
B
HH270MP, HH270OB, HH389MP, HH 389MPC,
HH389OB:
A
B
• A: Wire holder.
• B: Choke control lever.
Operation
Introduction
WARNING: Read and understand the safety
chapter before you use the product.
To do before you operate the engine
• Read this operator's manual carefully and make sure
that you understand the instructions.
• Fill engine oil and do a check of the engine oil level.
Refer to To do a check of the engine oil level on page
10 .
• Do the daily maintenance. Refer to Maintenance
schedule on page 9 .
• Read the operator's manual for the product that uses
this engine. Obey the procedures that must be done
before you start the product.
To fill fuel
If available, use low-emission/alkylate gasoline. If low-
emission/alkylate gasoline is not available, use good
quality unleaded gasoline or leaded gasoline. Use gasoline
with an octane number of 90 RON out of North America
1537 - 003 - 18.11.2022 7

(87 AKI in North America) or higher, and with a maximum
of 10% ethanol (E10).
CAUTION: Do not use gasoline with an octane
number less than 90 RON out of North America
(87 AKI in North America). This can cause
damage to the product.
1. Open the fuel tank cap slowly to release the pressure.
2. Fill slowly with a fuel can. If you spill fuel, remove it
with a cloth and let remaining fuel dry off.
3. Clean the area around the fuel tank cap.
4. Tighten the fuel tank cap fully. If the fuel tank cap is
not tightened, there is a risk of fire.
5. Move the product a minimum of 3 m (10 ft) from the
position where you filled the tank, before a start.
Oxygenated fuel
Oxygenated fuel is gasoline that is mixed with alcohol or
an ether compound. Some areas use oxygenated fuel to
decrease emissions. The fuel must not contain more than
the given percentages of these oxygenates:
• Ethanol: 27% by volume.
• MTBE: 15% by volume.
• Methanol: 5% by volume.
CAUTION: Fuel that contains methanol must also
contain cosolvents and corrosion inhibitors as
protection for the fuel system.
CAUTION: Oxygenated fuel that contains more
than the given percentages of these oxygenates
voids the warranty. The engine performance can
decrease and the engine can become damaged.
To start the engine
1. Set the fuel valve lever (A) to the ON position.
A
2. Set the choke lever to the correct position.
a) If the engine is cold, close the choke (B).
B
b) If the engine is warm, open the choke (B).
B
3. Apply approximately ⅓ throttle (C).
C
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4. Put the ON/OFF switch (D) to the ON position.
D
5. Pull the starter rope handle (E) slowly until you feel
resistance.
E
6. Pull the starter rope handle quickly and with force until
the engine starts.
7. Move the starter rope handle back slowly into its initial
position to prevent damage to the engine.
8. If the engine is cold, open the choke gradually as the
engine becomes warm.
To set the engine speed
For recommended engine speed, refer to the operator's
manual for the product that uses this engine.
• Move the throttle control (A) to increase or decrease
the engine speed.
A
To stop the engine
1. Move the throttle control to the low speed position.
2. Set the engine ON/OFF switch to OFF. The engine
stops.
3. Move the fuel valve to the OFF position.
Maintenance
Introduction
WARNING: Read and understand the safety
chapter before you do maintenance on the
product.
Maintenance schedule
* = General maintenance done by the operator. The
instructions are not given in this operator's manual.
X = The instructions are given in this operator's manual.
O = This maintenance must be done by a servicing dealer.
All instructions are not given in this operator's manual.
Engine maintenance Before
use, each
10h
After the
first month
or 20h
Each 3
months or
50h
Each 6
months or
100h
Yearly or
each
300h
Each 2
years
Make sure that there are no fuel or oil leaks. *
Make sure that nuts and screws are tightened. *
Look for signs of damage. *
Clean around the muffler and the recoil starter. *
Do a check of the fuel level and the engine oil
level. X
Clean the oil filter. * *
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Engine maintenance Before
use, each
10h
After the
first month
or 20h
Each 3
months or
50h
Each 6
months or
100h
Yearly or
each
300h
Each 2
years
Replace the engine oil. X X
Examine the air filter. Clean the air filter if it is
necessary. X
Clean the air filter. Clean at shorter intervals if
the engine is used in a dusty environment. X
Replace the air filter. Applies to paper element
type only. X
Clean the sediment cup. X X
Examine and clean the spark plug. Replace the
spark plug if it is necessary. X X
Replace the spark plug. X
Clean the spark arrestor screen on the muffler. X X
Do a check of the idle speed. X
Adjust the valve head clearance for the air in-
take and the exhaust valves. O
Drain the fuel and clean the fuel tank and the
fuel filter. O
Clean the combustion chamber. O
Examine the fuel line. Replace it if it is neces-
sary. O
To do a check of the engine oil level
The sensor for low oil level automatically stops the engine
before the engine oil level becomes too low but it is
recommended to do a check of the engine oil level before
each start. The sensor for low oil level is not included on
all engine models. Refer to .
CAUTION: Do not operate the engine with low
engine oil level. It can cause damage to the
engine.
CAUTION: Use detergent engine oil for 4-stroke
engines with the viscosity range shown in the
illustration.
-20 0 20 32 40
403020100-10-20-30
F
C
60 80 10050
5W-30
SAE 30
10W-30
1. Stop the engine and make sure that it is level.
2. Remove the oil tank cap and dipstick (A).
C
A
B
3. Clean the oil from the dipstick.
4. Put the dipstick back but do not tighten it.
5. Remove the dipstick.
6. Examine the engine oil level on the dipstick.
7. If the engine oil level is low (B), fill engine oil to the
edge of the oil tank hole (C).
8. Do a check of the engine oil level again.
9. Install the oil tank cap and dipstick.
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