1. Introduction
This manual provides essential information for the safe and efficient operation, setup, and maintenance of your EBERTH GW2-ERWP10 2 HP 1-inch Gasoline Water Pump. This portable, gas-powered pump is designed for various water transfer tasks, offering independence from electrical power sources.
The pump is suitable for irrigating green spaces, fields, and gardens, as well as for draining swimming pools, basements, boats, or other areas affected by heavy rain or flooding. Its robust design and carry handle ensure easy transport and storage.

2. Safety Instructions
Always adhere to the following safety guidelines to prevent injury or damage to the equipment.
- Read the Manual: Before operation, thoroughly read and understand all instructions in this manual.
- Ventilation: Operate the pump only in well-ventilated areas. Exhaust fumes contain carbon monoxide, which is a colorless, odorless, and deadly gas.
- Fuel Handling: Gasoline is highly flammable. Refuel in a well-ventilated area with the engine off and cool. Avoid spilling fuel. Do not smoke or use open flames near the pump or fuel.
- Hot Surfaces: The engine and exhaust system become very hot during operation and remain hot for some time after shutdown. Avoid contact to prevent burns.
- Stable Surface: Always place the pump on a firm, level surface to prevent tipping during operation.
- Water Only: This pump is designed for water transfer. Do not pump flammable liquids, corrosive chemicals, or other hazardous materials.
- Children and Pets: Keep children and pets away from the operating pump.
- Personal Protective Equipment: Wear appropriate safety gear, such as gloves and eye protection, when handling fuel or operating the pump.
3. Package Contents
Verify that all items are present in the package:
- EBERTH GW2-ERWP10 Gasoline Water Pump
- Suction filter
- Hose connectors (1-inch)
- Hose clamps
- Spark plug wrench
- Fuel mixing bottle
- Basic toolkit
- Instruction Manual


4. Product Overview
Familiarize yourself with the main components of the water pump:
- Engine: 2 HP, 2-stroke gasoline engine.
- Fuel Tank: Located on top of the engine, capacity 0.7 liters.
- Pull Starter: For manual engine ignition.
- Throttle Lever: To adjust engine speed and water flow.
- Choke Lever: Used for cold starts.
- Suction Port: 1-inch threaded connection for the inlet hose.
- Discharge Port: 1-inch threaded connection for the outlet hose.
- Priming Port: Cap for filling the pump housing with water before starting.
- Drain Plug: For draining water from the pump housing.
- Metal Frame & Carry Handle: Provides stability and portability.


5. Setup
5.1. Unpacking and Placement
- Carefully remove the pump and all accessories from the packaging.
- Place the pump on a stable, level, and well-ventilated surface, away from flammable materials.
5.2. Connecting Hoses
- Attach the suction filter to the end of the suction hose. Ensure the filter is fully submerged in the water source during operation.
- Connect the suction hose to the pump's 1-inch suction port. Secure it tightly with a hose clamp to prevent air leaks. Air leaks in the suction line will prevent the pump from priming.
- Connect the discharge hose to the pump's 1-inch discharge port. Secure it with a hose clamp.
5.3. Fueling the Engine
The EBERTH GW2-ERWP10 uses a 2-stroke engine, requiring a specific gasoline-oil mixture.
- Prepare a fuel mixture of unleaded gasoline and 2-stroke engine oil at a ratio specified by the engine oil manufacturer (typically 25:1 or 50:1). Use the provided mixing bottle for accuracy.
- Ensure the engine is off and cool.
- Unscrew the fuel tank cap.
- Carefully pour the mixed fuel into the fuel tank (0.7-liter capacity), avoiding overfilling.
- Securely replace the fuel tank cap.

5.4. Priming the Pump
The pump must be primed with water before starting the engine to ensure proper operation and prevent damage.
- Locate the priming port cap on top of the pump housing.
- Unscrew the priming port cap.
- Slowly fill the pump housing with clean water until it overflows.
- Securely replace the priming port cap.

6. Operating Instructions
6.1. Starting the Engine
- Ensure the pump is primed and all hose connections are secure.
- Move the choke lever to the "CLOSED" or "START" position (for cold starts). For a warm engine, the choke may not be necessary.
- Set the throttle lever to a mid-range position.
- Grasp the pull starter handle firmly and pull it slowly until resistance is felt, then pull quickly and smoothly. Repeat until the engine starts.
- Once the engine starts, gradually move the choke lever to the "OPEN" or "RUN" position as the engine warms up.

6.2. Adjusting Flow Rate
The water flow rate can be continuously adjusted using the throttle lever.
- Move the throttle lever towards "FAST" for higher engine RPM and maximum flow.
- Move the throttle lever towards "SLOW" for lower engine RPM and reduced flow.

6.3. Stopping the Engine
- Move the throttle lever to the "SLOW" or "IDLE" position.
- Turn the engine switch to the "OFF" position.

7. Maintenance
Regular maintenance ensures optimal performance and extends the life of your pump.
- After Each Use:
- Drain all water from the pump housing by removing the drain plug.
- Clean the suction filter to remove any debris.
- Wipe down the exterior of the pump.
- Fuel Storage: If storing the pump for an extended period (more than 30 days), drain the fuel tank and carburetor to prevent fuel degradation and starting issues.
- Spark Plug: Inspect and clean the spark plug periodically. Replace if worn or fouled. Use the provided spark plug wrench.
- Air Filter: Clean the air filter regularly, especially in dusty conditions. A dirty air filter can reduce engine performance and increase fuel consumption.
8. Troubleshooting
Refer to this section for common issues and their solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Engine does not start | No fuel or incorrect fuel mixture Choke not set correctly Spark plug fouled or faulty Engine switch in OFF position | Fill with correct fuel mixture Adjust choke lever Clean or replace spark plug Turn engine switch to ON |
| Pump does not prime or deliver water | Pump not primed Air leak in suction line Suction filter clogged Suction hose kinked or too long Water source too low | Fill pump housing with water Check all suction hose connections for tightness Clean suction filter Straighten hose, reduce length if possible Ensure suction filter is fully submerged |
| Reduced water flow | Throttle set too low Suction filter clogged Hoses partially blocked Air leak in suction line | Increase throttle setting Clean suction filter Check hoses for obstructions Check suction connections |
| Engine runs rough | Incorrect fuel mixture Dirty air filter Fouled spark plug | Use correct fuel mixture Clean air filter Clean or replace spark plug |
9. Specifications
| Model Number | GW2-ERWP10 |
| Engine Type | 2-stroke, Gasoline |
| Engine Power | 2 HP (1.47 kW) |
| Max. Flow Rate | 200 Liters per minute (12,000 l/h) |
| Suction Port Diameter | 1 inch |
| Discharge Port Diameter | 1 inch |
| Max. Suction Height | 7 meters |
| Max. Delivery Head | 17.5 meters |
| Fuel Tank Capacity | 0.7 liters |
| Approximate Run Time | Up to 4 hours (on a full tank) |
| Dimensions (L x W x H) | 29 x 27 x 34 cm |
| Weight | 7 kg |
| Material | Metal |
10. Warranty and Support
For warranty information, technical support, or spare parts, please contact your retailer or the EBERTH customer service department. Keep your purchase receipt as proof of purchase.