321SP - Electric hedge trimmer HUSQVARNA - Free user manual and instructions

Product type	Gas engine portable sprayer
Brand	Husqvarna
Model	321SP
Engine	Single-cylinder 2-stroke, air-cooled
Displacement	25.4 cm³
Maximum power	0.75 kW at 7000 rpm
Operating speed	7000 ± 500 rpm
Idle speed	3000 ± 200 rpm
Fuel type	Mixture of unleaded gasoline / 2-stroke oil
Mixing ratio	50:1 (2%) with recommended Husqvarna oil
Fuel tank capacity	0.6 L
Pump	Piston type, working pressure 1.5-3.0 MPa
Maximum pressure	3.5 MPa
Maximum flow rate	7 L/min
Dimensions (L × W × H)	332 × 330 × 335 mm
Net weight	9.44 kg
Gross weight	14.5 kg
Starting system	Recoil starter with choke and primer
Spark plug	LD L7T (gap 0.6-0.7 mm)
Supplied accessories	Inlet/return/outlet hoses, spray wands (3 nozzles and 1 nozzle), tools

Frequently Asked Questions - 321SP HUSQVARNA

What type of fuel should I use for the Husqvarna 321SP?

Use a mixture of unleaded gasoline (minimum octane rating 90 RON) and high quality 2-stroke engine oil, preferably Husqvarna oil. The recommended mixing ratio is 50:1 (2% oil). Do not exceed 10% ethanol (E10).

How to start the engine when cold?

Press the primer bulb 10 times. Set the choke to the closed position. Pull the starter cord slowly until resistance is felt, then pull quickly and forcefully until the engine makes a starting sound. Move the choke to the open position, then pull again until the engine starts. Let it warm up for 60 seconds at low speed.

How to stop the engine during use?

Press the stop switch located on the handle. The engine stops immediately. For an emergency stop, release the throttle and turn off the ignition.

How often should I clean the air filter?

Every 25 operating hours, remove the air filter cover, inspect it, and clean it with warm water and a mild detergent. Let it dry completely before reinstalling. Replace it if it is deformed or damaged.

How to maintain the spark plug?

Every 25 hours, remove the spark plug and clean the electrodes with a wire brush. Check the gap: it should be 0.6 to 0.7 mm. If the plug is fouled or cracked, replace it with a new one (model LD L7T). Tighten to a torque of 14.7 to 21.6 N·m.

What to do if the pump does not spray?

First check that the chemical tank is filled. Make sure the shutoff valve is open and the engine speed is sufficient. Clean the nozzle and the inlet filter. If the problem persists, the internal valves of the pump may be clogged: contact an authorized service center.

How to clean the sprayer after use?

Fill the spray tank with about 5 liters of clean water. Spray through the nozzle for 2 to 3 minutes, then drain the remaining water. This prevents clogging of the hoses and pump by chemical residues.

What is the transmission oil draining procedure?

After the first 25 operating hours, then every 100 hours, drain the transmission oil. Use SAE90 oil (about 100 cc). Consult an authorized dealer for this operation if necessary.

Can I use chemicals other than pesticides?

This sprayer is designed mainly for spraying pesticides and herbicides. Do not use flammable, corrosive or unintended products. Follow local regulations and the chemical manufacturer's instructions.

How to store the unit for a long period?

Empty the fuel tank and run the engine until it stops to empty the carburetor. Clean the chemical tank and the nozzle. Remove the spark plug, pour a few drops of 2-stroke oil into the cylinder, pull the starter cord 2-3 times, then reinstall the spark plug. Store in a dry, frost-free place.

USER MANUAL 321SP HUSQVARNA

EN Operator's manual 2-14

TROUBLE SHOOTING....12

TRANSPORTATION AND STORAGE....13

TECHNICAL DATA....14

ACCESSORIES....14

INTRODUCTION

Operator's manual Intended use

The initial language of this operator's manual is English. Operator's manuals in other languages are translations from English.

Product description

This product is a portable sprayer with a combustion engine. Check with your servicing dealer for more information.

This product has been designed mainly for the purpose of spraying pest control chemicals and weedkillers. Please do not use it for any other purposes or tasks, as this may cause unforeseen accidents.

Note: National or local regulations may regulate the use. Comply to given regulations.

Overview

Technical line drawing of a mechanical component with labeled part (1), no readable text or symbols present

Technical diagram of an internal combustion engine with numbered components for identification

Labeled diagram of a medical or laboratory apparatus with numbered components

1. Primer

2. Air filter cover

3. Choke lever

4. Fuel tank

5. Starter handle

6. Throttle lever

7. Stop switch

8. Spark plug

9. 3-nozzle spray lance

10. Single nozzle spray lance

11. Front handle

12. Rear handle

13. Chock valve

14. Pressure regulating dial

15. Front plate

16. Frame

17. Hose assembly

18. Operator manual

19. Assembly tools

20. Spare parts

21. Fuel oil mixing tank

Symbols on the product

Read this manual before operating Primer

Wear protective headgear, protective goggles, ear muffs and protective mask

Wear rubber boots

Wear protective clothing

Wear rubber gloves

Electric shock

Hot surface

High pressure injection

Keep safe distance

The port to refuel the MIX GASO-LINE

The direction to close the choke

The direction to open the chok

Low speed

High speed

Note: Other symbols/decals on the product refer to certification requirements for other 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 no repaired at an approved service center or by an approved authority

SAFETY

Safety definitions

The definitions below give the level of severity for each signal word.

WARNING: Injury to persons.

CAUTION: Damage to the product.

Note: This information makes the product easier to use.

General safety instructions

WARNING: Read the warning instructions that follow before you use the product.

- Use the product correctly. Injury or death is a possible result of incorrect use. Only use the product for the tasks found in this manual. Do not use the product for other tasks.

• Read, understand and follow the instructions and the symbols in this manual. If the operator does not follow the instructions and the symbols, injury, damage or death is a possible result.
• Do not discard this manual. Use the instructions to assemble, to install attachments and accessories, to operate and to maintain. Only use approved attachments and accessories.
• It is not possible to give warning on every situation that can occur during operation and maintenance of the product. Always be careful and use your common sense.
  • Make sure that parts are not damaged before you use the product. Follow the maintenance schedule. Only do the maintenance work that instructed in this manual. An approved service center must do all other maintenance work.
• Do not operate the product or do maintenance on the product if you are not sure of the situation. Turn to the approved dealer, service agent or service center for information.

- Disconnect the spark plug cable before assembly, storage or maintenance of the product.

- Do not use the product if it is changed from its initial specification. Do not change any part of the product without approval from the manufacturer. Only use parts approved by the manufacturer. Injury or death is a possible result of incorrect maintenance.

- Do not breathe in the fumes from the engine. Long-term inhalation of the engine exhaust fumes is a health risk.

- Do not start the product indoors or near flammable material. The exhaust fumes is hot and contain spark which can start a fire. Not sufficient airflow can cause injury or death because of asphyxiation or carbon monoxide.

- When you use this product the engine makes an electromagnetic field. The electromagnetic field can cause damage to medical implants. Check with your physician and medical implant manufacturer before you use the product.

- Do not let a child or a person without knowledge of the instructions operate the product.

- Make sure that you always monitor a person, with decreased physical capacity or mental capacity, that uses the product. A responsible adult must be there at all times.

- Lock the product in an area that children and unapproved persons cannot access.

- The product can eject objects and cause injuries. Obey the safety instructions to decrease the risk of injury or death.

- Do not leave the product when the engine is on.

- The operator of the product shall be responsible for any accident occurs.

- Make sure that you are minimum 15 m (50 ft) away from other persons or animals before you use the product. Make sure that persons in the adjacent area know that you will use the product.

- Refer to national or local laws. They can prevent or decrease the operation of the product in some conditions.

- Do not use the product if you are fatigued or influenced by alcohol, drugs or medicine. They can have effects on your vision, alertness, coordination or judgment.

Safety instructions for operation

• Make sure the product is fully assembled before using it.
• Put the product on an even ground 3 m (10 ft) away from the position where you filled the fuel tank before starting the engine.
• The product can cause objects to eject, which can cause damage to the eyes. Always use an approved eye protection when you operate the product.
• Be careful, a child can come near the product without your knowledge during operation.
• Do not operate the product if there are persons in the work area. Stop the product if a person goes into the work area.
• Make sure that you are always in control of the product.
• Do not use the product if you cannot receive aid in case of an accident. Always make sure others know you will operate the product before you start.
• Do not turn with the product before you make sure that no persons or animals are in the safety area.
• Remove all unwanted materials from the work area before you start.
• Do not use the product in bad weather like fog, rain, strong winds, risk of lightning or other weather conditions. Dangerous conditions such as slippery surfaces can occur because of bad weather.
• Make sure that you can move freely and work in a stable position.
• Make sure that you cannot fall when you use the product. Do not tilt when you operate the product.
• Do not touch the bevel gear which is hot and can cause injury after the engine stops.
• Stop the engine before you move the product.

Chemical filling

- Chemical substances should be handled correctly, or it can cause serious poisoning or even fatal accidents. Always observing the warning symbols on the container, since some chemicals are extremely hazardous to humans and animals.

- Chemical substance containers should be stored separately from other containers with obvious warning symbols and out of the reach of children.

Personal protective equipment Fuel

WARNING: Read the warning instructions that follow before you use the product.

• Always use correct personal protective equipment when you operate the product. The personal protective equipment does not erase the risk of injury but just decreases the grade of injury if an accident occurs.
• Always use an approved eye protection while you operate the product.
- Do not operate the product with bare feet or with open shoes. Always use heavy-duty slip-resistant boots.
- Use heavy, long pants.
- If it is necessary, use approved protective gloves.
- Use a helmet if it is possible that objects fall on your head.
- Always use approved ear protection while you operate the product. Noise for a long period can cause noise-induced hearing loss.
- Make sure that you have a first aid kit nearby.

Protective devices on the product

• Make sure that you regularly do the maintenance to the product.
  • The life of the product increases.
  • The risk of accidents decreases.
• Let an approved dealer or an approved service center regularly examine the product to do adjustments or repairs.
• Do not use a product with damaged protective equipment. If the product is damaged, speak to an approved service center.

Check valve and throttle trigger

- Before start the engine, make sure the check valve is at the off position and the throttle trigger at the turtle position. Start with the check valve pulled out is dangerous, as chemical fluid may spray out of the nozzle when the engine is started.

Stop switch

- Start the engine. Make sure that the engine stops when you press the stop switch.

• Do not start the product if there is fuel or engine oil on the product. Remove the unwanted fuel or oil and let the product dry.
• If you spill fuel on your clothing, change clothing immediately.
• Do not get fuel on your body, which can cause injury. If you get fuel on your body, use a soap and water to remove the fuel.
• Do not start the engine if you spill oil or fuel on the product or on your body.
• Do not start the product if the engine has a leak. Examine the engine for leaks regularly.
• Be careful with fuel. Fuel is flammable and the fumes are explosive and can cause injuries or death.
• Do not breathe in the fuel fumes, it can cause injury. Make sure that there is a sufficient airflow.
• Do not smoke nor put warm objects near the fuel or the engine.
• Do not add fuel when the engine is running. Make sure the engine is cool before you refuel.
• Before you refuel, open the fuel tank cap slowly and release the pressure carefully.
• Do not add fuel to the engine in an indoor area. Not sufficient airflow can cause injury or death because of asphyxiation or carbon monoxide.
• Tighten the fuel tank cap carefully or a fire can occur.
• Move the product at a minimum of 3 m (10 ft) away from the position where you filled the tank before a start.
• Do not fill too much fuel in the fuel tank.
• Make sure that a leak cannot occur when you move the product or fuel container.
• Do not put the product or a fuel container where there is an open flame, spark or pilot light. Make sure that there is no flame within the storage area.
• Only use approved containers when you move the fuel or put the fuel into storage.
• Clean the product and empty the fuel tank before long-term storage. Obey the local law on where to dispose fuel.
• Remove the spark plug cable before you put the product into storage to make sure that the engine does not start accidentally.

Safety instruction for maintenance

- In order to maintain the functions of the product, regularly carry out the maintenance inspections listed in this manual. Please consult approved product supplier or nearest Husqvarna product dealer if maintenance or parts replacement are required but not listed in this Manual.

- Never keep the engine running while carrying out inspections or maintenance.

- Do not modify the product or dismantle the engine. This could lead to breakdown and serious accidents during operation.

- Do not touch the muffler or spark plug with bare hands immediately after stopping the engine, since the high temperature can cause burns.

- Use original Husqvarna replacement parts or brands designated by Husqvarna

ASSEMBLY

To connect inlet hose To connect outlet hose

WARNING: Only use approved inlet hose, since other hose may damage the pump.

Technical diagram of a mechanical device with labeled parts A and B, showing internal components and wiring connections.

1. Attach the inlet hose to the pump inlet (A) by tightening the wing nut (B). Tighten by hand only as overtightening may damage hose fittings.

To connect return hose

Technical diagram of a mechanical device with labeled components C, D, and E

1. connect the return hose (E) to fitting (C) and tighten by clamp (D).

Technical diagram of a mechanical assembly with labeled components F and G, showing pipe connections and housing parts.

1. Attach the spray hose to the pump outlet (F) by tightening the wing nut (G). Tighten by hand only as overtightening may damage hose fittings.

To connect spray lance

I H N O L J K H O P L

1. For 3-nozzle spray lance: Fasten the extended lance (I) to the chock valve (H). Fasten the 3-nozzle spray (J) to the extended lance (I). Ensure all connections are secured. Tighten by hand only.

2. For single nozzle lance: Fasten the single nozzle lance (K) to the chock valve (H). Ensure the connection is secured. The single nozzle lance is equipped with the flow adjustment. Tighten by hand only.

Note: If there is a leakage from the single nozzle lance (K) fittings, retighten the fittings with a spanner or multigrip.

1. After the spray hose assembly is connected with

the spray lance, inspect and ensure all connections in the spray hose assembly such as the seals (L), chock valve (H), handle (N), spray hose (O) and rear handle (P) are tightly secured. Tighten by hand only.

OPERATION

WARNING: Read, and understand the safety chapter before you operate.

To use fuel

CAUTION: This product has a two-cycle engine. Use a mixture of gasoline and two-cycle engine oil. Make sure to use the correct quantity of oil in the mixture. Incorrect ratio of gasoline and oil can cause damage to the engine.

Gasoline

CAUTION: Do not use gasoline with an octane number less than 90 RON (87 AKI). This can cause damage to the product.

CAUTION: Do not use gasoline with more than 10% ethanol concentration (E10). This can cause damage to the product.

CAUTION: Do not use leaded gasoline. This can cause damage to the product.

• Always use new unleaded gasoline with a minimum octane number of 90 RON (87 AKI) and with less than 10% ethanol concentration (E10).
- Use gasoline with a higher octane number if you frequently use the product at continuously high engine speed.
• Always use a good quality unleaded gasoline/oil mixture.

Two-cycle engine oil

• Use only the two-cycle engine oil of high quality, especially HUSQVARNA two-cycle engine oil. Use only the oil of an air cooled engine.

• Mixture ratio 50:1 (2%).

• Oil of low quality and high oil/fuel ratio can decrease the lifetime of catalytic converters.

• Check with the approved dealer when you select an oil.
• If Husqvarna two-stroke oil is not available, you can use another two-stroke oil of good quality that is intended for air cooled engines.
• Do not use the two-stroke oil for water-cooled outboard engines. The two-stroke oil is sometimes referred to as outboard oil.

Gasoline, liter	Oil, liter
	2% (50:1)
5	0.1
10	0.2
15	0.3
20	0.4

To mix the fuel

Note: Always use a clean fuel container when you mix the fuel. Do not use fuel mixture made over 30 days.

1. Add half of the gasoline.
2. Add all of the oil.
3. Shake the fuel mixture to mix.
4. Add the remaining half of gasoline.
5. Shake the fuel mixture again to mix.
6. Fill the fuel tank.

To filling the fuel tank

1. Make sure that the fuel mixture is correct and is in a fuel container with an antispill valve.

2. If fuel is on the container, remove the unwanted fuel and let the container dry.

3. Make sure that the area near the fuel tank cap is clean.

4. Remove the fuel tank cap.
5. Shake the fuel container before you add the fuel mixture to the fuel tank.
6. Put back the fuel tank cap.

To start and stop

Before you start the engine

1. Examine the product for missing, damaged, loose or worn parts.
2. Examine the nuts, screws and bolts.
3. Examine the air filter.
4. Examine the check valve and throttle trigger.
5. Examine the stop switch.
6. Examine the product for fuel leaks.
7. Examine the inlet hose, inlet filter, outlet hose, return hose and spray lance for correct connection.

To start a cold engine

WARNING: Do not touch the cover or use a product with damaged spark plug cap. It can burn your skin and cause electrical shock if the spark plug cap is damaged.

CAUTION: Do not pull all the starter rope out. Hold the starter rope handle when it is fully extended. Do not twist the starter rope around your hand.

1. Press the air purge ten times.
2. Move choke lever to the choke position.
3. Place the product to the even ground. Pull out the starter rope slowly until you feel some resistance. Pull the starter rope quickly and with force. Keep doing it until you hear the engine start.
4. Set the choke lever to the run position, then pull the starter rope until the engine starts.
5. Pull the throttle trigger slightly and run at low speed for 60 seconds.

To start a warm engine

1. Press the air purge ten times.
2. Set the choke lever to the run position, then pull the start rope until the engine starts.

To stop the engine

- Press the stop switch to stop the engine.

To spray

• Do not wind the hoses to the product body in any way, or hoses will be burnt or damaged
• Please use correctly, observing the precautions in this manual.
• When spraying, do not point the nozzle at your face, or at other people, animals, etc.
• If the chemical liquid runs out when spraying, put the engine to low speed immediately. Empty running of the engine may cause the spray pump to break.
• Please avoid using multiple nozzles, jet nozzles, or other nozzles that give a large spray volume, as spraying efficiency is sometimes impaired owing to insufficient pressure.

Spray procedure

Note: Start the engine and wait about 30 seconds to empty air in the pump every time when using the product.

1. Set the chock valve to close position
2. Start the engine.
3. Increase the engine speed.
4. Open the chock valve (H).
5. Wait about 30 seconds or longer until the chemical fluid starts to spray out from the nozzle in the form of mist.
6. When stopping work, close the cock valve (H) fully and reduce the engine speed.

b a b H

a. open b. close

Cleaning after spraying

1. Fill in about 5L of clean water into spray tank.
2. Spray through the nozzle for 2-3 minutes, and drain the water left inside the tank.

MAINTENANCE

WARNING: Read and understand the safety chapter before you clean, repair or do maintenance on the product.

To check the air cleaner

• After every 25 hours of operation, please remove the air cleaner cover and inspect the air cleaner. If it is too dirty, wash it carefully in warm water containing a neutral detergent, and put it back to its original position after drying it thoroughly.
- If the air cleaner is distorted or damaged, please replace it with a new one.
- If the air cleaner is blocked, the efficiency of the engine will be reduced. In addition, the engine interior will suffer abnormal wear if it is operated without filter or if continually operated with a distorted or damaged filter.

To check the fuel filter

• After every 25 hours of operation, empty the fuel tank, detach the fuel filter from the tank, and remove all dirt. If the filter is too clogged, please replace it with a new one.
- If the fuel filter is clogged, the engine speed may be limited or speed fluctuations may occur.
- If the engine is operated without a fuel filter, dirt will accumulate in the carburetor and cause it to malfunction

To check the spark plug

• Do not touch the spark plug with your bare hands immediately after operation, as there is the risk of burns due to high temperature.
• After every 25 hours of operation, detach the spark plug and remove dirt from the electrodes with a wire brush or similar.
• The correct electrode gap is 0.6 to 0.7mm .

0.6~0.7mm

• When replacing plugs, please use designated items.
• If too much fuel is absorbed or poor quality oil is used, the spark plug electrodes become dirty, making the engine harder to start.
• Note that using any spark plug other than those designated may result in the engine failing to operate properly or in the engine becoming overheated and damaged.
• To install the spark plug, first turn the plug until it is finger tight, then tighten it a quarter turn more with a socket wrench.

TIGHTENING TORQUE: 14.7 to 21.6 N.m. (150 to 220 kgf-cm)

To check the spray nozzle

- A clogged spray nozzle can cause the spray pressure and flowrate to drop. All excessive pressure will go back to the sprayer tank.

To correct the problem, immediately clean the spray tip by following these instructions:

1. Stop engine & remove the unit from the operators back.
2. Disconnect the spray rod from the spray hose assembly.
3. To remove the nozzle cap, turn in anticlockwise direction.
4. Inspect and clean the spray tip and metal strainer for 3-nozzle spray rod from any foreign material clogging or restricting the spray nozzle. Replace if damaged.
5. Reinstall the nozzle cap and the spray rod with the spray hose assembly tightly (hand tighten).

To check the pump oil level

• Oil level should be checked prior to each use.
• Make sure the sprayer is on an even surface.
• Verify the oil is showing as 1/3-1/2's full (approx. 100ml) in the oil glass window.

Note: Do not attempt any oil maintenance on this pump. The pump is pre-lubricated and sealed from the factory. If refilling is required, see an authorized dealer or service centre.

To check the muffler

WARNING: Inspect periodically, the muffler for loose fasteners, any damage or corrosion. If any sign of exhaust leakage is found, stop using the machine and have it repaired immediately. Note that failing to do so may result in the engine catching on fire.

Perform the procedures after every 100 hours of operation:

1. Remove the muffler, insert a screwdriver into the vent, and wipe away any carbon buildup. Wipe away any carbon buildup on the muffler exhaust vent and cylinder exhaust port at the same time.
2. Tighten all screws, bolts, and fittings.
3. Check and wipe off if any oil or grease left in between the clutch lining and drum with oil-free and lead-free gasoline.

To check the cooling system

WARNING: Never touch the cylinder, muffler, or spark plug with your bare hands immediately after stopping the engine. The engine can become very hot when in operation, and doing so could result in severe burns.

- When checking the product to make sure that it is in good condition before using it, check the area around the muffler and remove any staffs that attached, in case the muffler is overheated or even the engine catch on fire.

Maintenance schedule

- Check the intake air cooling vent and the area around the cylinder cooling fins for blockage every 25 hours of use, in case of engine overheat or even product failure. Note that it is necessary to remove the upper cover and the lower cover in order to be able to view the upper part of the cylinder.

To check the grease cups

- Open the upper cap of the grease cup and check the grease amount. Fill it up if it decreased.

To adjust engine speed

- Although the engine is adjusted before leaving the factory, it may require readjustment or maintenance after repeated use. Please consult the original supplier regarding inspections and maintenance other than those shown below.

To adjust engine speed

Note: Warm up the engine before adjusting the idle speed.

• If the engine stops or the pump continues to work at idle speed with the throttle trigger at the turtle position, readjust the engine speed with the idle speed adjustment screw on the left of the carburetor.
  Turn the idle adjustment screw:
• Counter-clockwise to reduce engine speed
• Clockwise to increase engine speed

To replace gear oil

• After first 25 hours of use, replace the gear oil. After that, replace it after every 100 hours of use (SAE90, 100cc).

Note: Make sure you obey the maintenance schedule. The intervals are calculated from daily use of the product. The intervals are different if you do not use the product each day. Only do the maintenance work that is found in this manual. Speak to an approved service center about other maintenance work not found in this manual.

Maintenance procedure	Daily	Weekly Monthly Note
Overall
Inspect the whole unit for damage,leakage or spillage	√
Inspect all accessible fasteners Tighten or replace if necessary
Inspect all screws/nuts/bolts	√		Tighten or replace if necessary.Adjusting screws are not included.
Check the hoses and fittings	√
Clean for any debris	√
Engine
Inspect and clean the fuel tank		√
Inspect and clean the fuel filter		√
Inspect and clean the air cleaner		√
Check the operation of the throttle lever and stop switch	√
Empty the fuel tank	√
Apply grease to the plunger	√
Clean or re-adjust the spark plug gap		√	Make sure the gap is 0.6-0.7mm (.025in).Replace if necessary
Inspect the muffler for damage.		√	Replace if necessary
Clean the muffler and the cylinder exhaust port			√
Clean the cylinder fins and intake air cooling fan			√
Spray nozzles and chemical filter
Clean chemical filter	√
Check the spray nozzles	√
Pump
Check the level of the pump oil			√
Replace the gear oil			√
Check the grease cups			√
Clean the pump			Spray 5L of clean water to clean the pump after use

TROUBLE SHOOTING

Trouble shooting
If running difficulties continue, contact your closest Authorized Dealer or Service Centre.

Problem Possible causes Remedy
Engine will not start	Electrode spark plug is wet or fouled	Clean or replace the spark plug
	Cracked spark plug insulator	Replace the spark plug
	Engine flooded	Crank engine with choke open and full throttle to clear excess fuel
	Incorrect or stale fuel	Drain and replace with correct fuel/oil mixture
	No fuel in tank	Refuel with correct fuel/oil mixture
Insufficient power	Clogged air cleaner	Clean and lubricate air cleaner
	Fuel line/passage clogged	Contact Service Centre or see authorized dealer
	Carbon build up in muffler	Contact Service Centre or see authorized dealer
	Use incorrect or stale fuel	Drain and replace with correct fuel/oil mixture
	Piston seizure	Contact Service Centre or see authorized dealer
	Machine is overworked	Operate properly - do not overload
Engine stops during operation	Switch is bumped	Restart the engine
	Shorting of spark plug	Clean spark plug or replace
	Piston scored	Contact Service Centre or see authorized dealer
	Fuel tank is empty	Refuel with correct fuel/oil mixture
	Carburetor or fuel tank clogged	Contact Service Centre or see authorized dealer
Engine is difficult to stop	Stop wire disconnected from the switch	Attach stop wire to switch
	Overheated engine	Contact service Centre or see authorized dealer
Unit main body	Loose engine and/or pump mounts	Retighten engine and/or pump mount screws
	Leak at the tube connections	Retighten the hose clip or replace if damaged
Pump is no spraying	No chemical diluted liquid in the sprayer tank	Fill the sprayer tank
	Valves inside the pump clogged	Contact Service Centre or see authorized dealer
	Cock valve blocked	Clean the cock valve or replace
	Incorrect pressure setting too low	Adjust the pressure regulating dial
	Pump is worn out or damaged	Contact Service Centre or see authorized dealer
	Spray rod nozzle clogged	Clean the nozzle
Insufficient spray pressure	Pump speed or pressure setting too low	Adjust the pump speed and pressure regulating dial
	Spray rod nozzle clogged	Clean the nozzle
	Pump seals and/or vee-packing seals worn or damaged	Contact Service Centre or see authorized dealer
	One way valve(s) inside the pump clogged	Contact Service Centre or see authorized dealer
	Clutch slipping	Replace the clutch
	Lack of lubrication	Apply grease onto the plunger
	Burst spray hose	Contact Service Centre or see authorized dealer
	Spray rod nozzle worn or dam-aged	Contact Service Centre or see authorized dealer

TRANSPORTATION AND STORAGE

Transportation

• Keep equipment safe during transportation to prevent damage and accidents.
• Keep the product and equipment in a dry and frost-proof area.
  • Empty the fuel and clean the product.
• Replace or repair damaged components.
• Use the correct protective cover on the product that does not keep moisture.
• Keep the product tightly attached during transport.

Storage

WARNING: When draining fuel, please be careful not to spill it. If fuel is spilt, wipe off thoroughly. In addition, please be sure to close the storage container cap tightly.

CAUTION: If fuel is left in the engine for protracted periods, the inside of the carburetor may become clogged and cause engine faulty starting and insufficient output.

- During storage, slightly loosen the cap of the chemical fluid tank. If screwed too tightly, the gasket may become distorted.

On completion of all work procedures with no plan to use the product again for a protracted period, please carry out the following pre-storage care to prevent trouble caused by time-lapse changes.

1. Clean the chemical fluid tank and nozzle.
2. Remove dirt from the sprayer and check for any damage or looseness. If any abnormality is found, correct it thoroughly in preparation for future use of the unit.
3. Drain the fuel tank.
4. Start the engine, and leave it at idle speed until all the fuel inside the carburetor is consumed and the engine comes to a natural stop.
5. Remove the spark plug and put a few drops (1 to 2 cc) of 2-cycle oil inside the engine. After pulling the starter rope 2 or 3 times, return the spark plug to its original position and stop in compressed position.
6. After oiling the throttle trigger and other metal parts with anti-corrosive oil, cover the product and store indoors in a low-humidity location.

TECHNICAL DATA

Technical data

Product model 321SP
Pump	Type	Plunger type
	Working Pressure (MPa)	1.5-3.0
	Max. Pressure (MPa)	3.5
	Max. Working Flowrate (LPM)	7
Engine	Type	Single-cylinder air-cooled 2-stroke gasoline engine
	Engine Displacement (cc)	25.4
	Max. Power/Speed (kW/rpm)	0.75/7000
	Engine Operating Speed (rpm)	7000±500
	Idling Speed (rpm)	3000±200
	Fuel Type	Gasoline/Oil Mixture
	Oil	2-strok oil
	Admixture ratio	25:1,40:1(Only Husqvarna genuine oil)
	Starter system	Easy starter
	Spark plug	LD L7T
External dimensions of main unit (mm) L*W*H:		332*330*335
Net weight / Gross weight (kg)		9.44 / 14.5
Capacity of fuel tank (L)		0.6

ACCESSORIES

Accessories

Name Spec.
Inlet hose	Length 2.5m, G1/2 14
Return hose	Length 2.5m, dia. 8mm
High pressure outlet hose	Length 15m, M14*1.5

ÍNDICE

INTRODUCCIÓN....15
SEGURIDAD....16
MONTAJE....19
FUNCIONAMIENTO....21
MANTENIMIENTO....23

Technical diagram of a mechanical device with labeled components A and B, showing internal components and wiring connections.

Technical diagram of a mechanical device with labeled components C, D, and E

Technical diagram of a mechanical assembly with labeled components F and G, showing internal components and tubing.

I H N O L J K H O P L

Technical diagram of a mechanical device with labeled components A and B, showing internal components and wiring connections.

Technical diagram of a mechanical device with labeled components C, D, and E

Technical diagram of a mechanical assembly with labeled components F and G, showing connections between components.

I H N O L J K H O P L

0.6~0.7mm

DONNÉES TECHNIQUES....62

ACCESSOIRES....62

INTRODUCTION

Technical diagram of automotive engine components with numbered parts and exploded views

Technical diagram of a mechanical device with labeled components A and B, showing internal components and wiring connections.

Technical diagram of a vehicle engine assembly with labeled components C, D, and E

Technical diagram of a mechanical assembly with labeled components F and G, showing pipe connections and structural parts.

I H N O L J K H O P L

0.6~0.7mm

Technical diagram of a mechanical device with labeled parts A and B, showing internal components and wiring connections.

Technical diagram of a mechanical device with labeled components A, B, C, D, and E

Technical diagram of a mechanical device with labeled components F and G, showing tubing and internal components.

I H N O L J K H O P L

0.6~0.7mm

Technical line drawing of a mechanical component with labeled part (1), no readable text or symbols present

Technical diagram of an internal combustion engine with numbered components for identification

Labeled diagram of a laboratory apparatus with numbered components

Technical diagram of a mechanical device with labeled parts A and B, showing internal components and wiring connections.

Technical diagram of a mechanical device with labeled components C, D, and E

Technical diagram of a mechanical assembly with labeled parts F and G, showing components like tubing and housing.

I H N O L J K H O P L

0.6~0.7mm

Technical line drawing of a mechanical component with labeled part (1), no readable text or symbols present

Technical diagram of an internal combustion engine with numbered components for identification

Labeled diagram of a laboratory gas collection apparatus with numbered components

Technical diagram of a mechanical device with labeled parts A and B, showing internal components and wiring connections.

Technical diagram of a mechanical device with labeled components A, B, C, and D

Technical diagram of a mechanical assembly with labeled components F and G, showing internal components and tubing.

I H N O L J K H O P L

0.6~0.7mm

Technical line drawing of a mechanical component with labeled part (1), no readable text or symbols present

Technical diagram of a mechanical device with numbered components for identification

Labeled diagram of a laboratory apparatus with numbered components

Technical diagram of a mechanical assembly with labeled components F and G, showing pipe connections and housing parts.

I H N O L J K H O P L

Technical diagram of a mechanical device with labeled parts A and B, showing internal components and wiring connections.

Technical diagram of a mechanical device with labeled components C, D, and E

0.6~0.7mm

لفحص أكواب الشحوم

Technical diagram of a mechanical device with labeled parts A and B, showing internal components and wiring connections.

Technical diagram of a mechanical device with labeled components C, D, and E

Technical diagram of a mechanical device with labeled components F and G, showing internal components and tubing.

I H N O L J K H O P L

产品操作

警告：操作前请仔细阅读并理解安全须知。

使用燃油

0.6~0.7mm

检查燃油滤清器

Original instructions

2022-3-31