SOLO 423 Knapsack Mist Blower Sprayer

1. Introduction

This manual provides essential information for the safe and efficient operation, maintenance, and troubleshooting of your SOLO 423 Knapsack Mist Blower Sprayer. The SOLO 423 is a modern, uniquely designed mist blower, protected by patents, engineered for agricultural and plant protection applications. Its working principle involves sending dust by airflow and liquid by pressure, ensuring effective and efficient application. Constructed primarily from plastic and light aluminum alloy, the unit is lightweight, anti-corrosive, and comfortable to carry.

The design allows for tiny fog droplets, enabling spraying on both right and back sides of leaves. This feature facilitates the use of high concentration and small discharge rates for chemicals, leading to savings in both chemical and water consumption.

2. Safety Information

Always prioritize safety when operating the mist blower. Failure to follow safety instructions can result in serious injury or property damage.

• Read the entire manual before assembly, operation, or maintenance.
• Wear appropriate personal protective equipment (PPE), including eye protection, gloves, long sleeves, and a respirator, especially when handling chemicals.
• Ensure adequate ventilation when operating in enclosed spaces.
• Never operate the machine near open flames or sparks.
• Use only recommended fuel and oil mixtures for the 2-cycle engine.
• Keep bystanders, children, and pets away from the operating area.
• Do not modify the sprayer. Use only genuine replacement parts.
• Always turn off the engine and allow it to cool before refueling or performing maintenance.
• Dispose of chemicals and fuel responsibly according to local regulations.

3. Components Overview

Familiarize yourself with the various parts of your SOLO 423 mist blower:

1. Tank lid / Filler basket with filter
2. Formula tank
3. Formula outlet
4. Spark plug
5. Carburetor
6. Muffler
7. Starter handle
8. Air filter
9. Fuel tank cap
10. Choke
11. -- (Not used in this diagram)
12. Shoulder strap – quick coupling
13. Liquid tap
14. Spray tube
15. Spray nozzle
16. Dosage sleeve
17. Throttle lever
18. Fuel tap
19. -- (Not used in this diagram)
20. Tank ventilation

4. Technical Specifications

5. Setup and Assembly

Your SOLO 423 mist blower may require some assembly before first use. Refer to the included operating manual for detailed, step-by-step instructions. General steps include:

1. Unpacking: Carefully remove all components from the packaging. Verify that all parts listed in the packing list are present.
2. Attach Spray Tube: Connect the spray tube (14) to the formula outlet (3) and secure it. Ensure the spray nozzle (15) and dosage sleeve (16) are correctly attached to the spray tube.
3. Connect Hoses: Ensure all fuel and liquid hoses are securely connected to their respective ports.
4. Install Shoulder Straps: Attach the shoulder straps (12) to the quick couplings on the unit for comfortable carrying.
5. Fuel Mixture: Prepare the correct 2-cycle fuel mixture as specified by the engine manufacturer (typically gasoline and 2-cycle oil at a specific ratio). Fill the fuel tank (under cap 9).
6. Fill Formula Tank: Open the tank lid (1) and fill the formula tank (2) with the desired liquid or dust, ensuring the filler basket with filter is in place to prevent debris from entering.

6. Operating Instructions

Follow these steps for safe and effective operation of your mist blower:

1. Pre-Operation Check:
   • Check fuel and formula levels.
   • Inspect all connections for leaks.
   • Ensure air filter (8) is clean.
   • Verify spark plug (4) is properly seated.
2. Starting the Engine:
   • Place the unit on a flat, stable surface.
   • Open the fuel tap (18).
   • Set the choke (10) to the START position (if cold engine).
   • Pull the starter handle (7) firmly until the engine starts.
   • Once started, gradually move the choke (10) to the RUN position.
3. Spraying/Blowing:
   • Adjust the throttle lever (17) to the desired engine speed.
   • Open the liquid tap (13) to begin spraying liquid.
   • Adjust the dosage sleeve (16) on the spray nozzle (15) to control the flow rate and spray pattern.
   • Direct the spray tube (14) towards the target area.
4. Stopping the Engine:
   • Close the liquid tap (13).
   • Reduce the throttle lever (17) to idle speed.
   • Turn off the engine using the designated switch (refer to specific engine controls in your manual).
   • Close the fuel tap (18) for storage.

7. Maintenance

Regular maintenance ensures optimal performance and extends the lifespan of your mist blower.

• After Each Use:
  • Empty and thoroughly rinse the formula tank (2) with clean water. Operate the sprayer with clean water to flush the spray tube and nozzle.
  • Clean the exterior of the unit, removing any chemical residue or dirt.
  • Check for any loose fasteners or damaged parts.
• Air Filter (8):
  • Inspect and clean the air filter regularly, especially in dusty conditions. A dirty air filter can reduce engine performance and increase fuel consumption.
  • Replace if damaged or excessively dirty.
• Spark Plug (4):
  • Periodically remove and inspect the spark plug. Clean any carbon deposits and adjust the gap if necessary.
  • Replace the spark plug annually or if it shows signs of wear.
• Fuel System:
  • Drain the fuel tank (under cap 9) if storing the unit for an extended period (more than 30 days) to prevent fuel degradation.
  • Clean the fuel filter if present.
• Storage:
  • Store the mist blower in a clean, dry, and well-ventilated area, away from direct sunlight and extreme temperatures.
  • Keep out of reach of children.

8. Troubleshooting

This section addresses common issues you might encounter with your SOLO 423 mist blower.

9. User Tips

• Always use fresh, high-quality fuel and mix it precisely with the recommended 2-cycle oil. Stale or improperly mixed fuel can cause engine damage.
• For optimal coverage and chemical saving, experiment with different dosage sleeve settings to find the ideal fog droplet size for your specific application.
• When spraying, maintain a consistent pace and distance from the target to ensure even application.
• After using pesticides or herbicides, always flush the system thoroughly with clean water to prevent chemical buildup and corrosion.

10. Warranty and Support

The SOLO 423 Knapsack Mist Blower Sprayer comes with a 1-year warranty, covering manufacturing defects. The engine, as a core component, also carries a 1-year warranty. Please retain your proof of purchase for warranty claims.

For technical support, spare parts, or warranty service, please contact your authorized dealer or the manufacturer's customer service department. Refer to the contact information provided with your purchase documentation.