Gol Pumps WG20 Gasoline Water Pump Operator's Manual

Notice

All rights reserved. Copy or transcribe this manual or any part of this manual is strictly prohibited without written authorization.

Please pay attention to the following safety labels that indicates personal safety is required.

⚠️ WARNING: WARNING indicates death, personal injury and/or property damage may occur if instructions are not followed carefully.

⚠️ CAUTION: CAUTION indicates personal injury and/or property damage might occur if instructions are not followed carefully.

⚠️ CAUTION:

• This manual is a part of the pump and should be transferred with the pump if the proprietorship is changed.
• The figures in this manual are for operation reference only and they may not be exactly the same as the productions.

1. Overview

Thank you for buying the pump(s). You are not ready to operate the pump without reading this manual carefully.

This manual applies to the series of pumps designed for transferring water with a temperature under 40°C.

Characteristics of these centrifugal pumps: axis side sucking, semiclosed impeller or closed impeller, single or multiple stage, volute chamber, outlet upwards, quick coupling, mechanical seal, counter-clockwise rotation from inlet side.

The manual shall be subject to any changes due to continuous improvement and/or generation changes without additional notices, and the company will not bear any responsibility for that reason.

⚠️ CAUTION: This centrifugal pump will give you completely trouble-free and satisfactory service only on the condition that it is installed and operated with due care and is properly maintained.

2. Components & Principle

1. Components

The diagram shows the components of the gasoline water pump, including:

• Muffler
• Fuel Cap
• Throttle Lever
• Water Inlet
• Choke Lever
• Air Cleaner
• Fuel Valve
• Inlet Connection
• Handle
• Plug
• Dipstick
• Drain Plug
• Engine Switch
• Bear Frame
• Filter

2. Principle

The centrifugal pump works by converting the rotational energy from the engine to water pressure. The rotation of the pump impeller imparts kinetic energy to the water as it is drawn in from the impeller eye (center) and is forced outward through the impeller vanes to the periphery. As the water exits the impeller, the water kinetic energy is then converted to pressure due to the change in area the water experiences in the volute section. The energy conversion results in increased pressure on the downstream side of the pump, causing flow.

3. Safety Instruction

⚠️ WARNING:

• DO NOT operate the pump if you are not feeling well to prevent any personal injury and/or property damage.
• For your safety, do not use this pump for flammable and/or corrosive liquids such as gasoline, alcohol, seawater, and so on.
• Plastic parts of this pump touching oil is not recommended.
• Always place the pump on a level solid ground to avoid fuel leak.
• Operate the pump in a ventilated place and keep it 1m away from the wall or other equipment.
• Only authorized and skilled operation is allowed.
• Gasoline is highly flammable and explosive; only refill in a ventilated place and keep flammable matters away. Do not overfill.
• Stop the engine before refilling (fuel and oil).
• Wipe up spilled fuel after refilling.
• Not for use in potentially explosive atmospheres.

The engine/pump can be seriously damaged without oil. Always check the oil level before using. Do not start the engine without adequate oil. The engine must stand on level ground when checking.

⚠️ CAUTION: For personal safety, please pay attention to the following labels:

• DO NOT touch hot muffler, cylinder, and other hot parts which can cause burns.
• Before use, carefully read this manual. Follow all safety warnings.
• Always stop the engine and/or allow the engine to cool before filling fuel while the engine is hot or running. Do not refuel in an unventilated area.
• Exhaust gases contain carbon monoxide, an odorless and deadly poison. Do not use indoors.

4. Specifications

Table 1 Specifications

5. Operation

1. Before Operation

1.1 Connect inlet pipe to the pump

Use a joint to connect the inlet pipe to the pump and tighten it with a hoop. The inlet pipe must be non-folding and not longer than the required length. A shorter pipe results in better pump performance. The self-priming time is proportional to the inlet pipe length. The filter should be assembled to the inlet of the pipe. See figure 3.

Diagram showing inlet and outlet connections with numbered parts:

• 1. Inlet/Outlet mouth
• 2. Rubber sealing gasket
• 3. Joint tube
• 4. Joint tube connecting
• 5. Clamp
• 6. Inlet/Outlet pipe

⚠️ CAUTION: Always operate the pump with a filter to prevent pump block or impeller damage.

Leakage from the pipe or joint will reduce self-priming or other performance. Keep the joint and hoop tightened.

1.2 Connect outlet pipe to the pump

Use a joint to connect the outlet pipe to the pump and tighten it by hoop. A short pipe with a large diameter is the best choice. A long pipe or a small diameter pipe will increase flow friction and thus reduce pump power.

⚠️ WARNING: In case of pipe burst, an outlet pipe that can experience a pressure higher than the maximum pressure of the pump is required.

1.3 Check oil level.

⚠️ CAUTION: No fuel and oil in the engine. Fill fuel and oil before using.

1. Remove dipstick and clean it.
2. Insert the dipstick into the oil filler neck, but do not screw it in. Then remove it and check the oil level.
3. If the oil level is near or below the lower limit marked on the dipstick, remove the dipstick and fill with the recommended oil to the upper limit (bottom edge of the oil fill hole). Do not overfill.
4. Reinstall dipstick.

⚠️ CAUTION:

• Do not overfill.
• Oil is a major factor affecting performance and service life. Use 4-stroke automotive detergent oil. The applicable oil grade depends on the ambient temperature. Please prepare accordingly. SAE 10W-30 is recommended for general use.

Diagram showing recommended oil grades based on ambient temperature (Fahrenheit and Celsius).

⚠️ WARNING: The engine can be seriously damaged without oil. Always check the oil level before using. The engine must stand on level ground when checking.

1.4 Check fuel level.

1. Remove the fuel cap.
2. Add unleaded gasoline to the fuel level limit if necessary (indicated by a red plate in the neck of the fuel tank). 90# gasoline is recommended for general use.
3. Wipe up spilled fuel and reinstall the cap tightly.

⚠️ WARNING:

• Do not overfill.
• Leaded gasoline or unclean gasoline will increase deposition in the engine block and shorten engine life.

⚠️ WARNING: Gasoline is highly flammable and explosive; you can be burned or seriously injured during refueling. Stop the engine and keep heat, sparks, and flame away. Refuel only outdoors. Gasoline is poisonous; be careful not to touch it or inhale its vapor.

1.5 Check air filter

Air filter can be classified by half-bath type and oil-bath type, see figure 5.

(1) Oil-bath Type

1. Unscrew the butterfly nut and then remove the cleaner cover and element.
2. Clean the element with a solution that has a high fire point and is non-flammable, and then dry it.
3. Soak the element with engine oil and then squeeze out unwanted oil.
4. Reassemble the element and cover.

NOTE: Check for cleanliness of the filter. Add oil to the oil-bath filter up to the "OIL LEVEL" mark on the air filter shroud before initial use.

(2) Half-bath type

1. Remove the air filter cover. Be careful to prevent dirt falling into the air filter base.
2. Remove the air filter from the air filter base.
3. Inspect the filter element(s). Clean or replace it if necessary.
4. Reinstall filter element(s) and cover.

Diagrams illustrating the components of the Half-bath type and Oil-bath type air filters.

1.6 Check/infuse water

Infuse water into the pump chamber before starting the engine. A self-priming pump can be started only with a full chamber of water. See figure 6.

⚠️ WARNING:

• Running the pump without water inside will cause overheating and seal damage.
• If the water in the pump chamber is sucked out, stop the engine immediately. Allow the engine to cool and then infuse water again.

Diagram showing the water inlet for infusing water.

2. Start the engine.

1. Open fuel valve.
2. Close choke.

⚠️ CAUTION: Do not use the choke if the engine is warm or the temperature is high. See figure 7.

Diagram showing the fuel valve and choke lever positions.

3. Set engine switch to "ON". See figure 8.
4. Move throttle lever to the left side. See figure 9.
5. Pull starter handle lightly until you feel resistance, then pull quickly.

⚠️ CAUTION: Do not allow the starter handle to snap back against the engine. Return it gently.

6. After the engine warms up, open the choke gradually. See figure 10.
7. Adjust throttle lever to achieve the rated speed.

⚠️ WARNING:

• Do not refill while the engine is running.
• Wipe up spilled fuel before starting the engine.

3. Stop Engine/After Use

1. Move throttle lever to the right side.
2. Set engine switch to "OFF". See figure 11.
3. Close fuel valve.

⚠️ CAUTION: Turn the engine switch to "OFF" immediately IN AN EMERGENCY.

6. Maintenance & Servicing

For maintaining your pump's performance, scheduled checks and adjustments are required. Scheduled maintenance will extend pump life.

⚠️ WARNING:

• Before any repair and maintenance, make sure that the pump is stopped.
• If the pump has been used with any fluid other than water, apply clean water for a short while to clean the pump before repair or maintenance.

1. Replace oil.

Replace oil after the initial 20 hours or the first month of operation, whichever is applicable. Oil can be drained thoroughly when the engine is still hot. Remove the oil drain bolt and drain the oil. Replace with new oil. See figure 12.

⚠️ CAUTION:

• Do not overfill.
• Wash hands with soap after oil replacement.

Diagram showing oil drain plug and dipstick.

2. Maintenance of air filter

A dirty air filter will reduce airflow and cause carburetor blockage. Please pay attention to the scheduled maintenance of the air filter.

1. Unscrew the butterfly nut and then remove the filter cover and element.
2. Clean the element with a solution that has a high fire point and is non-flammable, and then dry it.
3. Soak the element with engine oil and then squeeze out unwanted oil.
4. Reassemble the element and cover.

⚠️ WARNING: Do not start and operate the engine without the air filter, otherwise dirt will enter the cylinder through the carburetor and cause engine damage.

3. Maintenance of Spark Plug

To ensure the normal performance of the engine, check the spark plug clearance timely.

1. Remove spark plug cap.
2. Clean dirt around the spark plug base.
3. Remove spark plug.
4. Inspect the spark plug. Clean the spark plug with a wire brush. If the insulator is cracked or ragged, replace it accordingly.
5. Measure the spark plug clearance with a gauge. The clearance should be 0.6~0.8mm. If necessary, bend the outside electrode and adjust it to the required clearance. See figure 13.

Diagrams showing spark plug removal, cleaning, and adjustment.

6. Install the spark plug by hand, and note that the screw is not tightened.
7. After installing a new spark plug by hand, tighten it 1/2 circle by wrench (1/8 to 1/4 circle for a used spark plug). See figure 14.

⚠️ CAUTION: Reinstall the spark plug cap.

⚠️ CAUTION: Spark plug must be fixed tight. Do not use an incorrect heat rating spark plug.

7. Trouble Shooting

1. Engine won't start.

• 1.1 Make sure engine switch is "ON".
• 1.2 Check fuel level.
• 1.3 Fuel valve is "ON".
• 1.4 Has fuel reached the carburetor?

⚠️ WARNING: Wipe up spilled fuel before starting the engine.

• 1.5 Check oil level.
• 1.6 Remove spark plug and check if there are sparks. Adjust the gap or replace the spark plug if necessary.
• 1.7 Send generator to the dealer or authorized service center if you need help.

2. Pump has no function.

• 2.1 Water infused?
• 2.2 Filter blocked?
• 2.3 Pipe leak? (cracking, loose hoop, bad seal)
• 2.4 Over self-priming height?

8. Transportation & Storage

⚠️ WARNING: Allow the engine to cool before transportation or storage.

Turn the fuel switch to "OFF" position and fasten the pump on a level surface during transportation to reduce the possibility of fuel leak.

If the pump will be stored for a long time, the following items are recommended:

1. Clean the pump, including the impeller, in case of any mud, sand, or other chips inside.
2. Empty the fuel tank and carburetor bowl.
3. Start the engine and let it run until it stops due to lack of fuel.
4. Change engine oil if it will be stored longer than 3 months.
5. Remove the spark plug and empty a little engine oil (about 30 ml) into the hole. Crank the engine a couple of times. Reinstall the spark plug.
6. Clean the pump thoroughly.
7. Lubricate all the parts outside if necessary.
8. Inspect the pump for damage and repair it if necessary.
9. Apply rust protection to the metal surfaces.
10. Store the pump indoors and cover it if possible.

⚠️ CAUTION: Pump seals will lose function after 12 months. Check and replace it if that time is reached.

9. Unpacking

When unpacking:

• Do not turn upside down and handle with care!
• Package list, certificate, warranty card, and operator's manual are packed inside. Check if all goods comply with the package list.
• Contact a local dealer or service/repair center when you have questions. You can also call the service hotline for help.

10. Warranty

Dear consumer:

Thank you for choosing the products. According to the Law of the People's Republic of China on the Protection of Consumers' Rights and Interests, the company must provide warranty service upon you providing the receipts and warranty card.

1. The warranty period is one year.
2. The company will repair your engine at no cost to you, including diagnosis, parts, and labor within the warranty period, if you ensure the performance of all scheduled maintenance.
3. Subject to the following conditions, the company will not bear any cost, including diagnosis, parts, and labor. We provide timeless toll maintenance service for your convenience.

• 1) Lack of receipts or warranty card.
• 2) Damage due to sudden factors or improper use (including, without limitation, transit, impact, improper fuel).
• 3) Self-repair without admission.
• 4) Information shown on the warranty card does not conform to the engine.
• 5) Warranty period has expired.

Contact Information

Gol Pumps Technology Company

Supply, Import, Export Water Pumps

Gol Pumps Technology

www.golpumps.com

Our Address: 6520 NW 77th CT, Miami FL 33166, USA

Sales DPT: +1 786 615 8984

After Sales Service: +1 786 452 9775

Fax: +1 786 65 7043

Email: info@golpumps.com