Husqvarna Operator's Manual

Federal Emission Control Warranty Statement

This warranty explains your rights and obligations regarding the emissions control system on your 2007 and later Husqvarna Forest & Garden small nonroad engine. The system includes parts like the carburetor, fuel tank, and ignition system. Husqvarna Forest & Garden will repair any warrantable condition at no cost, covering diagnosis, parts, and labor.

Manufacturer's Warranty Coverage

Engines are warranted for two years. Any defective emission-related part will be repaired or replaced.

Owner's Warranty Responsibilities

You are responsible for performing required maintenance as listed in the Operator's Manual. While retaining receipts is recommended, warranty may not be denied solely for lack of receipts. However, warranty coverage may be denied if the engine or a part failed due to abuse, neglect, improper maintenance, unapproved modifications, or use of non-approved parts. Present your engine to an authorized dealer promptly. Repairs should be completed within 30 days.

For questions regarding warranty rights, contact your nearest authorized servicing dealer or call Husqvarna Forest & Garden at 1-800-487-5963.

Warranty Commencement Date

The warranty period begins on the date the engine is delivered.

Length of Coverage

Husqvarna Forest & Garden warrants the engine to be free from defects in materials and workmanship for a period of two years.

What is Covered

Repair or replacement of any warranted part will be performed at no charge by an approved Husqvarna Forest & Garden servicing dealer.

Warranty Period

Parts not scheduled for replacement as required maintenance are warranted for 2 years. Parts scheduled for replacement are warranted up to the first scheduled replacement point.

Diagnosis

Diagnostic labor leading to the determination of a defective warranted part is free if performed by an approved dealer.

Consequential Damages

Husqvarna Forest & Garden may be liable for damages to other engine components caused by a warranted part failure.

What is Not Covered

All failures caused by abuse, neglect, or improper maintenance are not covered.

Add-On or Modified Parts

The use of add-on or modified parts can void warranty claims. Husqvarna Forest & Garden is not liable for failures caused by such parts.

How to File a Claim

Contact your nearest authorized servicing dealer or call Husqvarna Forest & Garden at 1-800-487-5963.

Where to Get Warranty Service

Warranty services and repairs are available at all authorized Husqvarna Forest & Garden servicing dealers.

Maintenance, Replacement and Repair of Emission-Related Parts

Any approved replacement part used for warranty maintenance or repairs on emission-related parts will be provided free of charge if the part is under warranty.

Emission Control Warranty Parts List

• 1. Carburetor and internal parts
• 2. Intake pipe, air filter holder, and carburetor bolts
• 3. Air filter and fuel filter (covered up to maintenance schedule)
• 4. Ignition System (Spark Plug, Ignition Module)
• 5. Fuel tank with cap and pipe

Maintenance Statement

The owner is responsible for all required maintenance as defined in the operator's manual.

Safety

SAFETY FIRST

Instructions in this manual and on warning seals marked with a ⚠️ symbol concern critical points to prevent serious bodily injury. Read and follow all such instructions carefully.

Notes on Types of Warnings

• ⚠️ WARNING: Critical steps or procedures to prevent accidents leading to serious bodily injury or death. Must be followed without exception.
• ℹ️ IMPORTANT: Steps or procedures which, if not followed correctly, could lead to mechanical failure, breakdown, or damage.
• ? NOTE: Supplementary instructions for hints or directions useful in product use.

Warning Labels on the Machine

Symbols

⚠️ WARNING! The machine can be dangerous if used incorrectly or carelessly, potentially causing serious or fatal injury. Read and understand the operator's manual before use.

The blower operator must ensure no bystanders or animals come nearer than 50 feet (15 meters). Maintain a safe distance of at least 50 feet (15 meters) between operators.

A breathing mask should be used when there is a risk of dust.

Always Wear:

• ? Hearing protection
• ?️ Approved eye protection

Keep all parts of your body away from hot surfaces.

Always wear protective gloves.

Wear sturdy, non-slip boots.

The blower can forcibly throw objects that can bounce back, potentially causing serious eye injuries if recommended safety equipment is not used.

Other symbols/decals refer to special certification requirements for certain markets.

ℹ️ IMPORTANT: If a warning label peels off or becomes unreadable, contact the dealer for replacements.

Symbols on the Machine

Symbols are carved in relief on the machine for safe operation and maintenance. Pay attention to these indications to avoid mistakes.

• (a) Fuel port (MIX GASOLINE): Position: FUEL TANK CAP
• (b) Choke close direction: Position: INTAKE CUP
• (c) Choke open direction: Position: INTAKE CUP
• (d) Engine stop direction: Position: THROTTLE LEVER [130 BT/150 BT/170 BT only]

Emission Information Label

<FOR EPA ONLY>

<FOR EPA & CARB>

These labels indicate compliance with U.S. EPA and California emission regulations. The Emissions Compliance Period indicates operating hours for which the engine meets requirements (Category C = 50 hours, B = 125 hours, A = 300 hours).

For customer assistance, call 704-921-7000 or visit www.husqvarna.com.

ℹ️ IMPORTANT: Check the emission information label. For <FOR EPA ONLY> models, the product is unsupported for use in California.

Safety Precautions

⚠️ WARNING

1. Read this manual carefully and understand how to operate the unit properly to avoid serious injury.
2. Keep this manual handy for reference. Contact your dealer for assistance with any questions.
3. Include this manual when selling, lending, or transferring ownership.
4. Do not lend or rent the machine without the owner's manual.
5. Ensure anyone using the unit understands the manual's information.
6. Never let a child use the machine.
7. Long-term noise exposure can cause permanent hearing impairment; always use approved hearing protection.
8. Never modify the machine's design without manufacturer permission. Use only genuine accessories. Unauthorized modifications can cause serious injury or death.
9. A blower is dangerous if used carelessly, potentially causing serious or fatal injuries. Read and understand this manual.
10. Husqvarna AB reserves the right to modify product design and appearance without notice.
11. The machine is designed only for blowing lawns, pathways, asphalt roads, and the like.

Safety Precautions

WORKING CONDITIONS

1. Refrain from operating if tired, ill, upset, or under the influence of alcohol, drugs, or medication.
2. Use hearing protection as required to reduce the risk of hearing loss.
3. Always wear eye protection and foot protection (approved goggles) to reduce the risk of injury from thrown objects.
4. Use a face filter mask in dusty conditions to reduce the risk of dust inhalation.
5. Wear rubber-soled shoes or shoes with anti-slip protection to prevent falling.
6. Do not wear loose clothing, scarves, neck chains, long hair, or other loose material to reduce the risk of injury from rotating parts.
7. Prolonged exposure to vibrations and cold may cause whitefinger disease (Raynaud's phenomenon). To reduce risk: keep body warm, never use in rain, wear thick anti-vibration gloves, take frequent breaks in a warm place, maintain a firm grip without excessive pressure, and see a doctor if fingers/body parts feel discomfort, redness, or swelling.
8. The ignition system produces a low-intensity electromagnetic field that may interfere with pacemakers. Consult your physician and pacemaker manufacturer before operating.

WORKING CIRCUMSTANCE

1. Do not operate in unventilated areas due to exhaust fume inhalation (carbon monoxide risk).
2. Avoid using where stable footing and balance are not assured.
3. Never operate in high wind, bad weather, potentially explosive atmospheres, poor visibility, or extreme temperatures (recommended environment below 40°C / 104°F).

AVOID NOISE PROBLEM

? NOTE: Check and follow local regulations for sound levels and operating hours.

1. Operate power equipment only during reasonable hours.
2. Limit the number of pieces of equipment used simultaneously to reduce sound levels.
3. Operate blowers at the lowest possible throttle speed.
4. Check equipment before operation, especially the muffler, air intakes, and air filters.

WORKING PLAN

To reduce health damages, avoid excessive use and take sufficient time to rest.

FUEL

⚠️ WARNING: To reduce the risk of fire and burn injury:

• Handle fuel with care; it is highly flammable.
• Do not smoke while handling fuel.
• Do not refuel a hot or running engine.
• Avoid spilling fuel or oil; wipe unit dry before using.
• Move at least 10 ft. (3 meters) away from the fueling point before starting the engine.
• Store gasoline in an approved container for flammable liquids.
• Ensure the unit is properly assembled and in good operating condition.
• Do not use the blower near a fire, as aiming it at a flame may ignite flammable substances.

Safety Precautions

BEFORE STARTING THE ENGINE

Each time before starting, inspect the entire unit for proper order and secure tightening. Do not use if fuel line, exhaust line, or ignition wiring is damaged; have it repaired first.

ℹ️ IMPORTANT: Before starting, check the volute case and net for obstacles, which can cause serious injury or damage.

Diagrams show models [130BT] and [150BT/BF] [170BT/BF] [180BT/BF].

⚠️ WARNING: Check shock absorbers <A> for cracks or damage. Failure to replace them may cause the engine to come loose, resulting in serious injury. Replace if cracked.

⚠️ WARNING: To reduce the risk of injury from contacting rotating parts, stop the engine before installing/removing attachments. Never remove the Guard Net <B>. Always disconnect the spark plug before performing maintenance or accessing movable parts.

Diagrams show models [130BT] and [150BT/BF] [170BT/BF] [180BT/BF].

USING THE PRODUCT

⚠️ WARNING: If abnormal noise or vibration occurs, stop the engine immediately and contact a Husqvarna servicing dealer. Checking the fan is critical; a broken fan can lead to serious accidents.

1. Check the work area and remove or cover valuables that may be damaged by air blast or thrown debris.
2. To reduce the risk of injury from thrown objects:
   • Watch out for children, pets, open windows, or freshly washed cars; blow debris safely away.
   • Use the full blower tube extension to work close to the ground.
   • Do not allow bystanders in the work area.
   • Do not point the blower tube at people or pets.
   • Always check that no debris has been blown onto someone else's property.
   • Pay attention to wind direction; do not work against the wind.
3. To minimize blowing time:
   • Use rakes and brooms to loosen debris before blowing.
   • In dusty conditions, slightly dampen surfaces or use a mister attachment if water is available.
   • Conserve water by using blowers instead of hoses for lawn and garden applications (gutters, screens, patios, grills, porches, gardens).
4. The blower must not be used while on a ladder or scaffolding.
5. Never put the machine down with the engine running unless it is in clear sight.
6. Never touch the spark plug or plug cord while the engine is in operation; this may result in electrical shock.
7. Never touch the muffler, spark plug, or other metallic engine parts, or the area around the engine cover, during or immediately after engine shutdown. These parts reach high temperatures and can cause serious burns.

⚠️ WARNING: Machine temperature may increase after stopping. Always cool down the engine before refueling.

8. In case of engine fire or other emergency, open the waist belt buckle and drop the machine backward to free yourself.
9. After use, CLEAN UP! Dispose of debris in trash receptacles.

Safety Precautions

MAINTENANCE

1. To maintain proper working order, perform maintenance and checking operations at regular intervals as described in the manual.
2. Always turn off the engine and disconnect the spark plug before performing any maintenance or checking procedures.

⚠️ WARNING: Metallic parts, engine cover, and the area around the engine reach high temperatures immediately after stopping the engine.

3. Examine the blower at intervals for loose fasteners and rusted or damaged parts. Pay special attention to the fuel line, muffler, and ignition wiring.
4. All engine service, except for those described in this manual, should be performed by competent service personnel. Improper service to the blower fan and muffler could cause hazardous failure.
5. When replacing any part or lubricant, always use only Husqvarna products or products certified by Husqvarna for use with the product.
6. If any part needs replacement or repair work not described in this manual, contact the nearest Husqvarna servicing dealer.
7. Do not use any accessory or attachment other than those bearing the Husqvarna mark and recommended for the unit.
8. Under no circumstances should you take apart or alter the product. Doing so might result in product damage during operation or failure to operate properly.

TRANSPORTATION

• Drain the fuel from the fuel tank before transporting or storing the blower.
• Secure the blower to prevent damage from shock during transportation.
• Do not apply strong forces, such as throwing or dropping, as this invalidates the warranty.

STORAGE

When storing the blower, choose a space indoors that is dry, cool, dark, well-ventilated, free from dust, and out of reach of children.

What is what?

<130BT>

Diagram shows components labeled 1-24:

• 1. Frame
• 2. Harness
• 3. Spark Plug Cap
• 4. Throttle Lever
• 5. Guard Net
• 6. Choke Lever
• 7. Air Cleaner
• 8. Volute Case, Cover
• 9. "CAUTION" Label
• 10. Elbow
• 11. Fuel Tank
• 12. Recoil Starter
• 13. Stop Switch with Throttle Position Setting
• 14. Engine Cover
• 15. Handle Bar (Option)
• 16. Fan
• 17. Shock Absorber (Spring)
• 18. Shock Absorber (Rubber)
• 19. Band (Stopper)
• 20. Flexible Hose
• 21. Pipes
• 22. Pad
• 23. Flat Nozzle (Option)
• 24. "EMISSION" Label

DISPOSAL

When disposing of your machine, fuel, or oil, be sure to follow your local regulations.

Material Breakdown:

• Frame: PE (Polyethylene)
• Harness: Chemical fiber
• Throttle lever: Metal, Plastic
• Volute case, Volute cover, Engine cover: PA66GF (Glass-reinforced nylon), Brass
• Pad: Chemical fiber
• Flexible hose: EVA (Ethylene vinyl acetate)
• Pipes: PP (Polypropylene), PE (Polyethylene)
• Fan: PA66GF (Glass-reinforced nylon)
• Element: Urethane

* The insert nut of volute case and fan can be taken off.

<150BT/BF>

Diagram shows components labeled 1-23:

• 1. Frame
• 2. Harness
• 3. Spark Plug Cap
• 4. Throttle Lever
• 5. Net
• 6. Choke Lever
• 7. Air Cleaner
• 8. Volute Case, Cover
• 9. "CAUTION" Label
• 10. Elbow
• 11. Fuel Tank
• 12. Recoil Starter
• 13. Stop Switch with Throttle Position Setting
• 14. Engine Cover
• 15. Handle Bar (Option) (150BT only)
• 16. Fan
• 17. Shock Absorber (Rubber)
• 18. Flexible Hose
• 19. Pipes
• 20. Pad
• 21. Flat Nozzle (Option)
• 22. "EMISSION" Label
• 23. Stop Switch (behind)

DISPOSAL

When disposing of your machine, fuel, or oil, be sure to follow your local regulations.

Material Breakdown:

• Frame: PE (Polyethylene)
• Harness: Chemical fiber
• Throttle lever: Metal, Plastic
• Volute case, Volute cover, Engine cover: PA66GF (Glass-reinforced nylon), Brass
• Pad: Chemical fiber
• Flexible hose: EVA (Ethylene vinyl acetate)
• Pipes: PP (Polypropylene), PE (Polyethylene)
• Fan: PA66GF (Glass-reinforced nylon)
• Element: Urethane

* The insert nut of volute case and fan can be taken off.

<170BT/BF>

Diagram shows components labeled 1-23:

• 1. Frame
• 2. Harness
• 3. Spark Plug Cap
• 4. Throttle Lever
• 5. Stop Switch (behind)
• 6. Net
• 7. Choke Lever
• 8. Air Cleaner
• 9. Volute Case, Cover
• 10. "CAUTION" Label
• 11. Elbow
• 12. Fuel Tank
• 13. Recoil Starter
• 14. Stop Switch with Throttle Position Setting
• 15. Engine Cover
• 16. Handle Bar (Option) (170 BT only)
• 17. Fan
• 18. Shock Absorber (Rubber)
• 19. Flexible Hose
• 20. Pipes
• 21. Pad
• 22. Flat Nozzle (Option)
• 23. "EMISSION" Label

DISPOSAL

When disposing of your machine, fuel, or oil, be sure to follow your local regulations.

Material Breakdown:

• Frame: PE (Polyethylene)
• Harness: Chemical fiber
• Throttle lever: Metal, Plastic
• Volute case, Volute cover, Engine cover: PA66GF (Glass-reinforced nylon), Brass
• Pad: Chemical fiber
• Flexible hose: EVA (Ethylene vinyl acetate)
• Pipes: PP (Polypropylene)
• Fan: PA66GF (Glass-reinforced nylon)
• Element: Paper, Urethane

* The insert nut of volute case, volute cover and fan can be taken off.

<180BT/BF>

Diagram shows components labeled 1-23:

• 1. Frame
• 2. Harness
• 3. Spark Plug Cap
• 4. Throttle Lever
• 5. Stop Switch (behind)
• 6. Net
• 7. Choke Lever
• 8. Air Cleaner
• 9. Volute Case, Cover
• 10. "CAUTION" Label
• 11. Elbow
• 12. Fuel Tank
• 13. Recoil Starter
• 14. Stop Switch with Throttle Position Setting
• 15. Engine Cover
• 16. Handle Bar (Option) (180 BT only)
• 17. Fan
• 18. Shock Absorber (Rubber)
• 19. Flexible Hose
• 20. Pipes
• 21. Pad
• 22. Flat Nozzle (Option)
• 23. "EMISSION" Label

DISPOSAL

When disposing of your machine, fuel, or oil, be sure to follow your local regulations.

Material Breakdown:

• Frame: ABS
• Harness: Chemical fiber
• Throttle lever: Metal, Plastic
• Volute case, Volute cover, Engine cover: PA66GF (Glass-reinforced nylon), Brass
• Pad: Chemical fiber
• Flexible hose: EVA (Ethylene vinyl acetate)
• Pipes: EVA (Ethylene vinyl acetate)
• Fan: PA66GF (Glass-reinforced nylon)
• Element: Paper, Urethane

* The insert nut of volute case, volute cover and fan can be taken off.

Technical Data

Note: The data shown above are those in the case of one straight pipe. Specifications are subject to change without notice.

Assembly

SWIVEL JOINT

1. Connect the blower and swivel joint with the flexible hose. Clamp both ends of the flexible hose securely with the supplied hardware.

? NOTE: A light lubricant may be used to ease assembly of the flexible hose to the blower elbow.

THROTTLE LEVER [130BT/150BT/170BT/180BT]

1. Set up the throttle holder to the swivel and tighten the screw on the holder. Match the holder to the convex on the swivel joint as shown in Figure F2.

2. Adjust the position and angle for a comfortable working position, and tighten the throttle lever.

(1) Cable (2) Hose

THROTTLE CABLE [130BT/150BT/170BT/180BT]

[130BT]: Fasten the throttle cable at the central position of the hose by the band attached to the throttle cable. Wrap the hose with the band from the lower side, then pass the band through a hole as shown in the figure. Be careful not to damage the hose by fastening the band too tightly.

[150BT] [170BT] [180BT]: Use the clamp to fasten the colgate tube containing the throttle cable and the power cable to the hose.

(1) Clamp

RIGHT HANDLE [150BF/170BF/180BF]

Insert the handle holder to the swivel and tighten the screw on the holder. Match the holder to the convex on the swivel joint as shown in Figure F5.

HANDLEBAR [OPTION] [130BT/150BT/170BT/180BT]

1. Insert the holder, then assemble the handlebar (OPTION) and tighten it securely.

BLOWER TUBES

1. Align the protrusion and groove on the tube ends and twist until the connection is locked.

? NOTE: A light lubricant may be used to ease assembly of the blower tube.

? NOTE: If a longer tube is required, connect the second straight pipe. If higher air speed is needed, replace the round blow pipe with the flat nozzle (option) with the second straight pipe.

(1) Flat nozzle (option)

HARNESS

? NOTE: The harness must always be worn when working with the machine. Failure to do so can result in injury. Adjust the harness for the best working position. Tighten side straps so pressure is evenly distributed across shoulders.

WAIST BELT [150BT/BF] [170BT/BF] [180BT/BF]

The waist belt attaches to rings on the left and right sides of the frame. (130BT has no waist belt.)

Place the waist belt around your waist, not too low on the stomach. Tighten the strap so the blower's weight rests on your hip. Be sure to tighten the buckle in front of your body.

⚠️ WARNING: If not using a waist belt, remove and store it. There is a risk the belt could be caught, toppling the unit, or be sucked into the fan.

Fuel

⚠️ WARNING: Gasoline is highly flammable. Avoid smoking or sparks near fuel. Stop the engine and allow it to cool before refueling. Refuel on bare ground, at least 10 ft (3m) away from the fueling point, before starting the engine.

Engines are lubricated by oil specifically formulated for air-cooled 2-cycle gasoline engines. Use Husqvarna oil or an antioxidant-added quality oil labeled for air-cooled 2-cycle use (JASO FC GRADE OIL or ISO EGC GRADE). Do not use BIA or TCW (2-stroke water-cooling type) mixed oil.

RECOMMENDED MIXING RATIO

GASOLINE 50 : OIL 1

Exhaust emissions are controlled by fundamental engine parameters. These engines are certified to operate on unleaded gasoline.

Use gasoline with a minimum octane number of 89 RON (USA/Canada: 87AL). Lower octane may cause engine temperature rise and potential seizing.

Unleaded gasoline is recommended for environmental and health reasons. Poor quality gasolines or oils may damage engine parts.

HOW TO MIX FUEL

ℹ️ IMPORTANT: Pay attention to agitation.

1. Measure gasoline and oil quantities.
2. Pour some gasoline into a clean, approved fuel container.
3. Pour in all the oil and agitate well.
4. Pour in the rest of the gasoline and agitate again for at least one minute. Insufficient agitation can lead to early piston seizing.

5. Indicate the contents on the container for easy identification.

FUELING THE UNIT

1. Untwist and remove the fuel cap.
2. Fill the fuel tank to 80% of its capacity.
3. Fasten the fuel cap securely and wipe up any spillage.

⚠️ WARNING: Select bare ground for fueling. Move at least 10 feet (3 meters) away from the fueling point before starting the engine. Stop the engine and let it cool for a few minutes before refueling. Ensure mixed gasoline is sufficiently agitated. Do not smoke or place hot objects near fuel.

FOR YOUR ENGINE LIFE, AVOID:

• FUEL WITH NO OIL (RAW GASOLINE): Causes severe engine damage.
• GASOHOL: Can deteriorate rubber/plastic parts and disrupt lubrication.
• OIL FOR 4-CYCLE ENGINE USE: Can cause spark plug fouling, exhaust port blocking, or piston ring sticking.
• Mixed fuels left unused for over a month may clog the carburetor.
• When storing for a long period, clean the fuel tank and empty the carburetor.
• Scrap used mixed oil containers only at authorized sites.

? NOTE: For quality assurance details, refer to the Warranty section. Normal wear and changes without functional influence are not covered. Improper usage of mixed gasoline may void warranty.

Operation

CONTROL ARM [150BF/170BF/180BF]

Hold the upper end of the control arm, pull it away from the unit, and rotate forward (counter-clockwise) until it clicks (first position). Rotate further for a second position if desired. Reverse order to fold the arm.

(1) First position (2) Second position

STARTING ENGINE

ℹ️ IMPORTANT: Avoid operating with the flexible tube and swivel joint disconnected, as this can cause engine overheating.

1. Push the primer bulb until fuel flows in the clear tube.
2. When the engine is cool, close the choke.

(1) Choke Lever (2) Primer Bulb (3) OPEN (4) CLOSE

3. Set the throttle lever position:

• [130BT]: Idling
• [150BT/BF] [170BT/BF] [180BT/BF]: About 1/3 Open

(1) Full Throttle (2) About 1/3 Open (3) Idling (4) STOP [130BT/150BT/170BT/180BT] as shown in F19 (5) Stop Switch [150BF/170BF/180BF] as shown in F20

4. To start, hold the top of the blower firmly with your left hand. Pull the starter knob slowly until it engages, then give it a strong pull.

ℹ️ IMPORTANT: Never twist the starter cord around your hand. Avoid pulling the rope to its full extent and letting it snap back to prevent premature damage. Do not let anyone stand near the blower or exhaust port.

5. Once the engine is running, gradually open the choke (if closed) and let the engine idle for a minute to warm up.

? NOTE: If the engine fails to start after several attempts due to overchoking, open the choke and repeat pulling the rope.

⚠️ WARNING: Air is expelled as soon as the engine starts, even at idle speed.

Operation

ADJUSTING IDLE SPEED

[130BT]: Factory idle speed is 3000 rpm. Use the adjustment screw on top of the carburetor if adjustment is necessary.

(1) Idling Adjustment Screw

[150BT/BF] [170BT/BF] [180BT/BF]: Factory idle speed is 2200 rpm [150BT/BF] or 2000 rpm [170BT/BF] [180BT/BF]. Use the adjustment screw on top of the carburetor if adjustment is necessary.

(1) Idling Adjustment Screw

STOPPING ENGINE

[130BT/150BT/170BT/180BT]: Move the throttle lever to the STOP position.

(4) Stop

[150BF/170BF/180BF]: Move the throttle lever to the idling position and press the stop switch (red button). The machine prevents sparks once the stop button is pushed until the engine stops.

(3) Idling (5) Stop Switch

? NOTE: If the engine does not stop when the ignition switch is set to stop, close the choke lever to stop the engine. In this case, have the machine repaired by your nearest servicing dealer.

(1) Choke Lever (2) OPEN (3) CLOSE

Maintenance

Maintenance, replacement, or repair of emission control devices may be performed by any qualified service provider.

⚠️ WARNING: Make sure the engine has stopped and is cool before performing any service. Contact with a rotating blower fan or hot muffler may result in personal injury.

AIR CLEANER

Check the air cleaner before use. A clogged filter increases fuel consumption and reduces engine power. Never operate without an air filter or with a deformed/broken element, as unfiltered air will damage the engine.

[170BT/BF] [180BT/BF]: Never clean the paper filter by tapping; this may break the element and damage the engine.

CLEANING AIR FILTER:

[130BT] (F29):

1. Unscrew knob, remove air cleaner cover.
2. Wash filter element in fresh, non-flammable cleaning solution (e.g., warm soapy water) and dry. (Clean weekly.)
3. Reinstall filter, ensuring the screen is attached. A missing screen means improper sealing and dust entry into the cylinder.
4. Hook cover slots onto body tabs and screw knob.

[150BT/BF] (F30):

1. Unscrew 2 knobs, remove air cleaner cover.
2. Wash filter element with neutral detergent and warm water, then dry completely. (Clean weekly.)
3. Moisten filter element with a small amount of 2-cycle oil.

? NOTE: Do not use 4-cycle motor oil. Do not use mixture gasoline (low oil content). Soak filter element in 2-cycle oil, then squeeze out excess oil until it weighs 2-3 times its dry weight.

4. Reinstall element into packing, set packing into air cleaner body. Ensure screen is attached properly.
5. Reinstall air cleaner cover and screw knobs.

[170BT/BF] [180BT/BF] (F31):

1. Unscrew 2 knob bolts, remove air cleaner cover, then remove prefilter.
2. Wash prefilter in fresh, non-flammable cleaning solution (e.g., warm soapy water) and dry. (Clean weekly.)
3. Exchange paper filter element if contaminated.

⚠️ WARNING: This prefilter is dry type. Never wash in oily solution or with oil. Do not tap clean the paper filter.

FUEL FILTER

A clogged fuel filter can cause poor acceleration. Check periodically for dirt. Remove using a small wire hook from the fueling port. Disconnect from fuel pipe, unhook retainer, and disassemble. Clean components with gasoline.

(1) Screen (2) Element (x 2) (3) Holder (4) Retainer

SPARK PLUG

The spark plug may gather carbon deposits. Remove and inspect every 25 hours. Clean electrodes with a wire brush. Adjust spark gap to 0.025 in (0.6 to 0.7mm).

Plug manufacturers recommend replacing the plug twice a year. Replacement plug: NGK CMR7H.

ℹ️ IMPORTANT: Using non-designated spark plugs may cause improper engine operation, overheating, or damage. Install by hand until tight, then tighten a quarter turn more with a socket wrench.

MUFFLER

⚠️ WARNING: Periodically inspect the muffler for loose fasteners, damage, or corrosion. If exhaust leakage is found, do not use the blower and have it repaired immediately.

1. Remove muffler, insert screwdriver into vent, and wipe away carbon buildup. Wipe exhaust vent and cylinder exhaust port simultaneously.
2. Tighten all screws, bolts, and fittings.

SPARK ARRESTER

The muffler has a spark arrester to prevent hot carbon from exiting the exhaust. Periodically inspect and clean with a wire brush.

(1) Bolt (2) Bolt (3) Spark Arrester (4) Diffuser

⚠️ WARNING: Before operation, ensure the muffler is properly held by bolts (2). Fastening Torque: [130BT] 7 to 11 N·m; [150BT/BF] [170BT/BF] [180BT/BF] 8 to 12 N·m. Ensure spark arrester and diffuser are attached with bolts (1). Fastening Torque: 2 to 3 N·m.

Maintenance

AIR INLET NET

ℹ️ IMPORTANT: Air is drawn through the air inlet net. If airflow drops, stop the engine and inspect the net for blockages. Failure to remove obstacles may cause engine overheating and damage.

(1) Net

⚠️ WARNING: Never use the blower without the net. Check before each use that the net is attached and undamaged.

IGNITION COIL AIR GAP INSPECTION

If the gap is inaccurate or when installing the coil or rotor, adjust the air gap between the ignition coil and the iron core of the rotor.

Air Gap:

• [130BT]: 0.35 mm (0.30 to 0.40 mm) / 0.014 in (0.012 to 0.016 in)
• [150BT/BF] [170BT/BF] [180BT/BF]: 0.40 mm (0.35 to 0.45 mm) / 0.016 in (0.014 to 0.017 in)

(1) Rotor (2) Ignition coil

SHOLDER STRAP

If the shoulder strap is damaged, it may break during use, causing the product to fall and resulting in injury. To replace:

• Take off the clip from the strap.
• Pass the end of the strap through the hanger.
• Return the clip to the strap.

ℹ️ IMPORTANT: Ensure the thick round bar of the clip is in the strap. Incorrect attachment can lead to serious personal injury.

Storage

BEFORE STORING THE BLOWER:

1. Drain the fuel tank and push the primer bulb until empty.
2. Remove the spark plug, drop a spoonful of 2-cycle oil into the cylinder, crank the engine several times, and reinstall the spark plug.
3. Store the unit in a dry, cool, dark, well-ventilated, dust-free place, out of reach of children.