Husqvarna 125B, 125BX-SERIES, 125BVX-SERIES Operator's Manual

Persons using the blower must wear the following safety equipment:

1. Approved ear protection.
2. Approved eye protection.
3. Approved protective gloves.
4. Boots or work shoes with a non-slip sole.
5. Face mask when operating the blower in dusty environments.

Instructions for blower operators:

• Read and understand this manual.
• Do not wear loose clothing, scarves, or neckchains, and keep long hair tied back to avoid entanglement with rotating parts.
• Do not operate the blower under the influence of alcohol, drugs, or when tired.
• Minors are not permitted to operate the blower.
• Always have a first aid kit readily available.

⚠️ WARNING: The fuel used in the blower is dangerous:

1. Volatile liquid: its vapor and exhaust fumes are poisonous.
2. Direct contact can cause skin irritation.
3. Extremely flammable.

Refer to the Fuel Handling section for specific safety instructions related to the fuel used.

The muffler is designed to minimize noise and direct exhaust fumes away from the operator. Mufflers with catalytic converters also reduce harmful exhaust components.

⚠️ WARNING: Engine exhaust fumes are hot and may contain sparks, posing a fire risk. Never start the machine indoors or near flammable materials.

⚠️ WARNING: Mufflers with catalytic converters become extremely hot during and after use, even at idle speed. Contact can cause burns. Be aware of the fire risk.

⚠️ WARNING: Never use the blower if any safety devices or guards are missing, damaged, or not working correctly.

The blower is equipped with safety devices and guards to prevent accidents. These are described in the general description. Regular inspection and maintenance of these components are required, as specified in the Maintenance section.

• Keep bystanders and animals at least 50 feet (15 meters) away from the work area.
• The blower can eject objects at high velocity, potentially causing serious eye injury if they ricochet.
• Never point the blower nozzle at people or animals.
• Stop the engine before fitting or dismantling accessories or components.
• Never operate the blower with missing guards.
• Avoid operating in poorly ventilated spaces where exhaust fumes could be inhaled.
• Stop the engine before refueling. Move the unit at least 10 feet (3 meters) from the fueling site before starting.
• The catalytic muffler remains extremely hot during and after operation, including at idle speed. Be aware of fire hazards, especially near flammable materials or vapors.

• Exercise caution, especially with left-hand operation. Avoid direct body contact with the inlet cover area. Keep jewelry, loose clothing, or items with loosely hanging straps, ties, or tassels away from the inlet cover area.
• Do not operate the blower while standing on a ladder or stand.
• Operate the blower only during reasonable hours to avoid disturbing others (e.g., 9:00 a.m. to 5:00 p.m., Monday-Saturday, as per local ordinances).
• Operate the blower at the lowest effective throttle setting.
• Before operation, check the condition of the blower, particularly the muffler, air intake, and air filter.
• Use a rake or broom to loosen ground debris before blowing.
• In dusty conditions, lightly spray the work area with a hose.
• Use blowers instead of hoses for lawn and garden tasks (e.g., cleaning roof gutters, patios, gardens) to conserve water.
• Be aware of children, pets, open windows, or vehicles, and blow debris away safely.
• Use the full nozzle extension to direct the air stream close to the ground.
• After use, clean up and dispose of debris in trash receptacles.

Diagram of the blower and its components:

• 1. Shoulder strap (125BVX-SERIES)
• 2. Throttle trigger
• 3. STOP switch
• 4. Variable speed control
• 5. Fan housing
• 6. Fuel cap
• 7. Air filter
• 8. Choke
• 9. Primer bulb
• 10. Inlet cover
• 11. Vacuum handle (125BX-SERIES and 125BVX-SERIES)
• 12. Cutters (125BX-SERIES and 125BVX-SERIES)
• 13. Fan impeller
• 14. Standard nozzle
• 15. High velocity nozzle
• 16. Blower tube
• 17. Tube clamp bolt
• 18. Tube clamp nut
• 19. Muffler
• 20. Ground wire
• 21. Starter handle
• 22. Starter device
• 23. Carburetor adjustment screws
• 24. 2-stroke engine oil
• 25. Operator's manual

Diagram of vacuum accessories:

• 21. Vacuum device with collection components (items 22-26)
• 22. Collection bag tube
• 23. Collection bag
• 24. Vacuum tube in two sections
• 25. Screw
• 26. Shoulder strap

Components designed for personnel and material protection require special attention during operation, inspection, and servicing.

• Throttle trigger (C): Regulates engine speed and output.
• Variable speed control (D): Allows setting engine speed as needed during blower use. ⚠️ CAUTION: Do not use the variable speed control during starting or vacuuming to avoid unit damage.
• Fan housing (E) and Fan impeller (F): Provide high performance air discharge.

The stop switch (A) is used to stop the engine. It automatically returns to the ON position when released.

The muffler reduces noise and directs exhaust fumes away from the operator. Catalytic converter mufflers also reduce harmful exhaust components. Engine exhaust fumes are hot and can contain sparks, posing a fire risk. Some models have a spark arresting screen (B) that requires regular cleaning or replacement. ⚠️ WARNING: The muffler is extremely hot during and after operation. Do not touch a hot muffler to avoid severe burns.

The ground wire (G) reduces static build-up in dry conditions.

The inlet cover (H) on the fan housing provides access for cleaning and inspecting the impeller (125BX-SERIES and 125BVX-SERIES only). If using the vacuum tube, it must be fitted to the inlet cover opening. Use a tool to lift the edge opposite the hinge to open. ⚠️ WARNING: Never start the blower if the inlet cover is not closed, is damaged, or cannot be closed (unless the vacuum tube is fitted).

Two cutters (J) on the impeller mulch leaves and debris when vacuuming.

NOTE: Ensure the tube clamp bolt and nut are installed before initial use.

The blower tube (K) attaches to the unit via a pegged slot system. Remove the tube clamp bolt to install or remove the blower tube. Align the slot in the blower air outlet with the raised rib on the tube, insert the tube, align holes, and re-insert and tighten the bolt.

Nozzles (L) use a bayonet mount for attachment to the blower tube. Air velocity increases through the nozzle, shaping the air stream. Adjust blower tube length by twisting the nozzle left to disengage, sliding to the desired position, and twisting right to lock.

The 125BVX-SERIES can use a shoulder strap for comfort, worn over the shoulder.

The starter device (M) engages the crankshaft when the starter handle (N) is pulled.

The fuel cap (O) is located at the rear of the engine shrouding and includes a seal to prevent fuel leakage.

The air filter (P) is a fiber filter medium. Regular cleaning is essential to prevent carburetor malfunctions, starting problems, loss of engine power, engine wear, excessive fuel consumption, and increased harmful exhaust fumes. Clean the filter every 25 hours or more frequently in dusty conditions. Replace the filter if it cannot be cleaned completely or if damaged.

The choke (Q) is located below the air filter cover and should be used for all cold starts.

NOT FOR ALL MODELS. The carburetor has three adjustment screws (R) for low speed jet, high speed jet, and idling. Carburetor adjustment adapts the engine to local conditions (climate, altitude, fuel, oil type). Refer to the Maintenance section for details.

CAUTION: The machine uses a two-stroke engine and requires a gasoline/two-stroke oil mixture. Accurate measurement is crucial for the correct ratio.

⚠️ WARNING: Ensure adequate ventilation when handling fuel.

Gasoline: Use only high-quality unleaded gasoline. The recommended minimum octane rating is 87. Lower octane can cause knocking, leading to increased engine temperature and potential breakdown. Higher octane is recommended for continuous high-speed operation.

Two-stroke oil: Use HUSQVARNA two-stroke oil (1:50 mixture, 2%) for optimal results. High-quality synthetic oil formulated for two-stroke engines can also be used. Do not use oil for water-cooled outboard engines or four-stroke engines.

Mixing: Mix gasoline and oil in a clean fuel container. Start by adding half the gasoline, then the entire amount of oil, mix thoroughly, and add the remaining gasoline. Mix (shake) the fuel mixture well before filling the tank.

Do not mix more than a one-month supply of fuel. If the machine is stored for an extended period, empty and clean the fuel tank.

⚠️ WARNING: The catalytic converter muffler gets very hot during and after use, posing a fire hazard. Be aware of this, especially near flammable substances or vapors.

⚠️ WARNING: To reduce fire risk:

• Do not smoke or place hot objects near fuel.
• Always shut off the engine before refueling. Allow it to cool for a few minutes.
• When refueling, open the fuel cap slowly to release excess pressure.
• Tighten the fuel cap securely after refueling.
• Move the machine away from the refueling area before starting.

Variable speed control: Push fully counterclockwise.

Ensure the area around the fuel cap is clean. Mix fuel properly before filling.

⚠️ WARNING: Never start the blower if the inlet cover is not closed, is damaged, or cannot be closed (unless the vacuum tube is fitted).

Cold Engine:

1. Press the primer bulb 10 times until fuel appears.
2. Move the blue engine choke lever to the FULL CHOKE (closed) position.
3. Hold the machine on the ground with your left hand (not your foot). Grip the starter rope handle firmly with your right hand. Do not squeeze the throttle trigger.
4. Slowly pull the starter cord until resistance is felt, then pull quickly and powerfully.
5. ⚠️ WARNING: Never wrap the starter cord around your hand.
6. Pull the starter handle up to 3 times until the engine attempts to run. Move the choke to the ½ position and pull the cord until the engine starts and runs.
7. Allow the engine to warm up for about 10 seconds, then move the choke to the OFF CHOKE (opened) position.

NOTE: If the engine stops, return the choke to the closed position and repeat starting steps.

⚠️ CAUTION: Do not pull the starter cord all the way out or let go of the handle when fully extended, as this can damage the machine.

Warm Engine:

1. Squeeze and hold the throttle trigger.
2. Move the choke to the ½ position.
3. Pull the starter rope sharply while holding the throttle trigger until the engine runs.
4. Move the choke to the OFF CHOKE (opened) position.

To stop the engine, push and release the engine STOP switch (S). The switch will automatically return to the ON position. Wait 7 seconds before attempting to restart to allow the switch to reset.

The owner is responsible for all required maintenance as per the operator's manual. Disconnect the spark plug before performing maintenance, except for carburetor adjustments.

⚠️ WARNING: Improper maintenance can lead to serious engine damage or injury.

Husqvarna products are designed to reduce harmful emissions. After 8-10 tanks of fuel, the engine is run-in. For peak performance and minimal emissions after the run-in period, have your carburetor adjusted by an authorized service dealer.

Function: The carburetor controls engine speed via the throttle. It mixes air and fuel.

T-screw (BB): Regulates idle speed. Clockwise increases idle speed; counterclockwise decreases it.

Basic Setting: Factory-adjusted. Fine adjustments should be made by a skilled technician.

Recommended idle speed: See Technical Data section.

Recommended max. speed: See Technical Data section.

Fine adjustment of the idle speed-T: Adjust the idle speed using the T-screw if needed. Correct adjustment ensures smooth engine running in all positions.

Some mufflers have catalytic converters (check Technical Data). The muffler dampens noise and directs exhaust fumes away. Exhaust fumes are hot and can contain sparks, posing a fire risk if directed at flammable material.

Some mufflers have a spark arresting screen (CC) that requires regular cleaning. Access the screen by removing the muffler outlet cover. Clean with a wire brush. Clean weekly or replace if necessary for non-catalytic mufflers. For catalytic mufflers, check and clean the screen monthly. If damaged, replace it. Frequent screen blockage may indicate a faulty catalytic converter; contact your dealer. A blocked screen can cause engine overheating and damage the cylinder and piston.

⚠️ CAUTION: Never use a machine with a faulty or loose muffler. Ensure muffler bolts are tight.

⚠️ WARNING: Mufflers with catalytic converters get very hot and remain hot after stopping, even at idle. Contact can cause burns. Be aware of fire risk.

⚠️ WARNING: Engine exhaust fumes contain carbon monoxide, which can cause poisoning. Do not start or run the machine indoors or in poorly ventilated areas. Exhaust fumes are hot and can contain sparks, posing a fire risk. Never start the machine indoors or near flammable material!

⚠️ WARNING: The inside of the muffler may contain carcinogenic chemicals. Avoid contact with these elements if the muffler is damaged.

The engine has a cooling system to maintain operating temperature. Components include:

1. Air intake on the starter device (DD).
2. Fan blades on the flywheel (EE).
3. Cooling fins on the cylinder (FF).
4. Cylinder cowling (guides airflow).

Clean the cooling system by brushing weekly, or more often if needed. A dirty or blocked system causes overheating and damage to the cylinder and piston.

The air filter (GG) must be cleaned regularly to remove dust and dirt to prevent:

• Carburetor malfunctions
• Starting problems
• Loss of engine power
• Unnecessary engine wear
• Excessive fuel consumption
• Elevated harmful exhaust fumes

Clean the filter every 25 hours, or more often in dusty conditions.

Cleaning the air filter: Remove the air filter cover (HH), take out the filter, and wash it in warm, soapy water. Rinse thoroughly and ensure it is dry before reinstalling. Replace the filter if it cannot be cleaned completely or if it is old.

⚠️ CAUTION: Always replace a damaged air filter.

Spark plug condition is affected by carburetor adjustment, fuel mixture, gasoline/oil quality, and air filter cleanliness. Dirty electrodes can cause operating problems and starting difficulties.

If the machine lacks power, starts poorly, or idles poorly, check the spark plug first. Clean it and check the electrode gap (0.024" / 0.6 mm). Replace the spark plug after about a month of use or sooner if necessary.

⚠️ CAUTION: Always use the recommended spark plug type. Using the wrong type can damage the piston/cylinder.

Daily Maintenance:

• Clean exterior surfaces.
• Check variable speed control and throttle trigger for safe function; replace damaged parts.
• Check stop switch for proper function; replace if necessary.
• Clean air filter; replace if necessary.
• (125BX-SERIES and 125BVX-SERIES): Check inlet cover locking; check fan impeller cleanliness, especially after vacuuming.
• Ensure all nuts and screws are tight.
• Check housings for cracks; replace damaged parts.
• (125BX-SERIES and 125BVX-SERIES): Check collection bag integrity and zipper; replace if necessary.

Weekly Maintenance:

• Check starter device, starter cord, and tensioning spring; replace damaged parts.
• Check air intake at starter device; remove debris if clogged.
• Clean spark plug exterior. Remove and check electrode gap (0.024" / 0.6 mm) or replace. Use Champion RCJ-8Y resistor spark plug or equivalent.
• Clean flywheel fan blades.
• Clean or replace spark arresting screen (if not on catalytic converter mufflers).
• Clean carburetor area.
• Clean air filter.

Monthly Maintenance:

• Clean fuel tank.
• Clean carburetor exterior and surrounding area.
• Clean flywheel fan blades and surrounding area.
• Check fuel lines for cracks or damage; replace if necessary.
• Change fuel filter in fuel tank.
• Check all cables and connections; replace damaged parts.
• Replace spark plug (Champion RCJ-8Y or equivalent).
• Change air filter.

⚠️ CAUTION: Perform the following steps after each use.

• Allow the engine to cool and secure the unit before storing or transporting.
• Store the unit and fuel in a well-ventilated area away from sparks or open flames (e.g., water heaters, electric motors, furnaces).
• Store the unit with all guards in place. Position it to prevent accidental injury from sharp objects.
• Store the unit and fuel out of reach of children.

Prepare the unit for storage if it will not be used for 30 days or more.

• Clean the entire unit before lengthy storage.
• Store in a clean, dry area.
• Lightly oil external metal surfaces.

Empty the fuel system before storage for 30 days or longer. Drain the fuel tank, start the engine, and let it run until fuel lines and carburetor are empty. Use fresh fuel next season.

Fuel stabilizer can be used to minimize fuel gum deposits during storage. Add stabilizer to gasoline according to container instructions. Run the engine for at least 5 minutes after adding stabilizer.

• Remove the spark plug and pour 1 teaspoon of 1:50 2-cycle engine oil (air-cooled) through the spark plug opening. Slowly pull the starter rope 8-10 times to distribute the oil.
• Replace the spark plug with a new one of the recommended type and heat range.
• Clean the air filter.
• Check the entire unit for loose screws, nuts, and bolts. Replace any damaged, broken, or worn parts.
• At the start of the next season, use only fresh fuel with the proper gasoline-to-oil ratio.

• Do not store gasoline from one season to another.
• Replace your gasoline can if it starts to rust.