1. Introduction
This manual provides essential information for the safe and efficient operation, maintenance, and troubleshooting of your Honda WB20XT4A 2-Inch Centrifugal Water Pump. Please read this manual thoroughly before operating the pump and keep it for future reference.
The Honda WB20XT4A is a general-purpose 2-inch centrifugal water pump powered by a durable GX12 118cc series commercial-grade engine, designed for various water transfer applications.
Image 1.1: The Honda WB20XT4A 2-Inch Centrifugal Water Pump, showing its red engine and gray pump housing within a black protective frame.
2. Safety Information
Operating this equipment safely is crucial to prevent injury or property damage. Always follow these safety guidelines:
- Read and understand all instructions in this manual before operation.
- Ensure the pump is on a stable, level surface during operation.
- Keep hands, feet, and clothing away from moving parts.
- Do not operate the pump in enclosed spaces to avoid carbon monoxide poisoning.
- Always shut off the engine and allow it to cool before refueling.
- Use only approved fuel and oil types as specified in the engine manual.
- Wear appropriate personal protective equipment (PPE) such as gloves and eye protection.
- Proposition 65 Warning: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
3. Setup and Preparation
Before starting the pump, ensure proper setup:
- Unpacking and Inspection: Remove the pump from its packaging and inspect for any shipping damage.
- Add Engine Oil: Fill the engine crankcase with the recommended oil type and quantity. Refer to the engine manual for specific details.
- Add Fuel: Fill the fuel tank with fresh, unleaded gasoline. Do not overfill. Ensure the fuel cap is securely tightened.
- Connect Hoses:
- Attach the suction hose securely to the pump's inlet. A perfect, airtight seal is critical for priming. Even a tiny leak can prevent the pump from drawing water.
- Attach the discharge hose to the pump's outlet.
- Priming the Pump: Remove the priming cap and fill the pump casing with water until it overflows. Replace the priming cap securely. This step is essential for centrifugal pumps to operate.
Image 3.1: The Honda WB20XT4A water pump in operation, with blue suction and green discharge hoses connected, actively moving water.
4. Operating Instructions
Follow these steps to operate your Honda water pump:
- Open Fuel Valve: Turn the fuel valve to the "ON" position.
- Set Choke: If the engine is cold, move the choke lever to the "CLOSED" position. For a warm engine, the choke may not be necessary.
- Set Throttle: Set the throttle lever to approximately 1/3 open for optimal starting.
- Start Engine: Pull the starter grip lightly until resistance is felt, then pull firmly and quickly. Repeat if necessary.
- Adjust Choke: Once the engine starts, gradually move the choke lever to the "OPEN" position as the engine warms up.
- Adjust Throttle: Adjust the throttle to the desired engine speed for pumping.
- Stopping the Engine:
- Move the throttle lever to the "IDLE" or "STOP" position.
- Turn the engine switch to the "OFF" position.
- Close the fuel valve.
Image 4.1: A person operating the Honda WB20XT4A water pump, holding the discharge hose and directing a powerful stream of water.
5. Maintenance
Regular maintenance ensures the longevity and optimal performance of your water pump.
- Engine Oil: Check engine oil level before each use. Change oil according to the schedule in the engine manual.
- Air Filter: Inspect and clean the air filter regularly. Replace if damaged.
- Spark Plug: Inspect and clean the spark plug periodically. Replace if worn.
- Fuel System:
- Always shut off the fuel valve after use, especially if the pump is truck-mounted or stored on an incline. This prevents vibration from flooding the float bowl and causing starting issues.
- Drain the fuel tank and carburetor if storing the pump for an extended period.
- Pump Casing and Impeller: Periodically inspect the pump casing and impeller for debris or wear. The pump features a durable cast iron volute and abrasion-resistant silicone-carbide seals for extended wear.
- General Cleaning: Keep the pump clean and free of dirt and debris.
6. Troubleshooting
Refer to this section for common issues and their solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Engine will not start | No fuel, old fuel, incorrect choke position, flooded engine, faulty spark plug. | Check fuel level, use fresh fuel, adjust choke, if flooded turn choke off and throttle all the way open and pull starter several times, inspect/replace spark plug. |
| Pump does not prime or loses prime | Insufficient water in pump casing, air leak in suction hose, clogged suction hose/strainer, worn impeller/seals. | Refill pump casing, check all suction hose connections for airtight seal, clear any blockages, inspect pump components. |
| Low water flow | Partial blockage, low engine speed, air leak, worn pump components. | Check for blockages, increase engine speed, inspect suction hose, check impeller/seals. |
| Excessive vibration | Unstable surface, loose components, damaged impeller. | Ensure pump is on a stable surface, check all fasteners, inspect impeller for damage. High performance mounts are designed to minimize vibration. |
7. Specifications
Key technical specifications for the Honda WB20XT4A water pump:
- Brand: Honda
- Model: WB20XT4A (also referred to as WB20XT3A in some documentation)
- Engine: GX12 118cc Series Commercial Grade Engine
- Pump Type: 2-Inch Centrifugal, Self-priming
- Maximum Flow Rate: 164 Gallons Per Minute
- Maximum Lifting Height: 105 Feet
- Product Dimensions (L x W x H): 19.3" x 14.4" x 16.5"
- Item Weight: 51 Pounds
- Power Source: Gas Powered
- Material: Cast Iron, Silicon
- UPC: 786102002530
Image 7.1: Diagram showing the dimensions of the Honda WB20XT4A water pump: 19.3 inches length, 14.4 inches width, and 16.5 inches height.
8. Warranty Information
This Honda water pump comes with a 3-year warranty. Please retain your proof of purchase for warranty claims. For detailed warranty terms and conditions, refer to the documentation provided with your product or contact Honda customer support.
9. Customer Support
For further assistance, technical support, or to locate authorized service centers, please contact Honda Power Equipment customer service. You can typically find contact information on the Honda website or in the documentation included with your pump.
Online Resources: Visit the official Honda Power Equipment website for FAQs, additional manuals, and service information.
