Manufactured under license of
Daewoo International Corporation
, Korea
www.daewoopowerproducts.com
USER'S MANUAL
GP
25-2
Gasoline water pump
1. PARTS LOCATION
01. Carry Handle
02. Switch
03. Throttle Lever
04. Choke lever
05. Fuel Tank
06. Recoil starter
07. Drain cap
08. Discharge port
09. Suction port
10. Pump drain plug
2. SPECIFICATIONS
Engine
Engine
type
1E40F-5
Rated
power
(kg)
1.2
Starting
System
Normal start
Fuel
Tank
Capacity
(L)
1. 2
Oil
type/oil
capacity
2 stroke, mixing oil
Speed
（
rpm
）
7600
Pump
Pump
type
1 inch
Suction diameter/Exit diameter
（
mm
）
25.4
Max discharge capacity
（
m3/h
）
8
Max discharge head
（
m
）
25-30
Max solid pass
（
m
）
8
Self-priming
time
（
s
）
60-180
Packing
Color Box
Tool
kit
Other
Oil
Alert
No
Certificate
(CE,UL,CSA,TUV)
CE/GS/EU1/EU2
Gross
weight/Net
weight
(kg)
9.6/8.6
Product
L×D×H
（
mm
）
370x280x310
Package L x D x H
（
mm)
385x300x370
3. WARNING LABELS ON THE MACHINE
1
2
3
4
(1) Never use the engine indoors.
(2) Don’t touch the engine when it is hot.
(3) Before refueling, be sure to stop the engine.
(4) Check the oil level before starting.
Read the instruction manual completely and carefully before using the power tool.
Wear safety glasses!
Wear hearing protection!
Wear protective gloves.
Wear safety footwear
With this symbol the manufacturer confirms that this power tool is in
accordance with applicable European directives.
If warning label peel off or become soiled and impossible to read, you should contact the dealer
from which you purchased the product to order new labels and affix them in the required location(s).
4. FOR SAFE OPERATION
1. Read this manual carefully until you completely understand and follow all safety and operating
instructions.
2. Keep this manual handy so that you may refer to it later whenever any questions arise. Also note,
if you have any questions which cannot be answered herein, contact the dealer from whom you
purchased the product.
3. Always be sure to include this manual when selling, lending, or otherwise transferring the owners-
hip of this product.
4. Never allow children or anyone unable to fully understand the directions given in the manual to
use the machine.
5. During transportation close the fuel cock and the fuel tank cap. Empty the fuel tank during trans-
portation on long distances or rough roads.
6. Don’t use the engine pump near people or animals.
7. Do not use the pump set close to cables or electrical equipment.
8. Keep the running (or still hot) pump away from any inflammable material.
9. Be careful with the muffler or other hot engine parts. During transportation close the fuel cock and
the fuel tank cap. Empty the fuel tank during transportation on long distances or rough roads.
10. Only use the pump in well-ventilated places, do not operate the pump in explosive or flammable
atmospheres or in closed environments.
11. Check the pump each day to ensure that each device, whether for safety or otherwise, is functional.
12. Never use a damaged, modified, or improperly repaired or assembled pump. Do not remove,
damage or deactivate any of the safety devices.
13. Never carry out operations or repairs on your own that are other than routine maintenance. Call
specialized and authorized workshops only.
14. Keep the pump set in a dry place, raised off the ground and with the tanks empty.
15. If your pump is no longer usable, dispose of it properly without damaging the environment by
handing it in to your local Dealer who will arrange for its correct disposal.
16. Take it to your dealer who will dispose of it properly. Always call your dealer for any clarification
or priority action.
INTEND USE
Only pump the water that is not intended for human consumption. Pumping flammable liquids, such as
gasoline or fuel oils, can result in a fire or explosion, causing serious injury. Pumping sea water, beve-
rages, acids, chemical solutions, or any other liquid that promotes corrosion can damage the pump.
WORKING CIRCUMSTANCE
Please make sure you review each precaution carefully.
EXHAUST PRECAUTIONS
• Never inhale exhausts gasses. They contain carbon monoxide, a colorless, odorless and extremely
dangerous gas which can cause unconsciousness or death.
• Never operate the engine indoors or in a poor venting area, such as tunnel, cave, etc.
• Exercise extreme care when operating the engine near people or animals.
• Keep the exhaust pipe free of foreign objects.
REFUELING PRECAUTIONS
• Be sure to stop the engine prior to refueling.
• Do not overfill the fuel tank.
• If fuel is spilt, wipe it away carefully and wait until the fuel has dried before starting the engine.
• After refueling, make sure that the fuel cap is secured to prevent spillage.
FIRE PREVENTION
• Do not operate while smoking or near an open flame.
• Do not use around dry brush, twigs, cloth rags, or other flammable materials.
• Keep the engine at least 3 feet (1 meter) away from buildings or other structures.
• Keep the engine away from flammables and other hazardous materials (trash, rags, lubricants and
explosive).
Check the General Condition of the Pump
• Look around and underneath the pump for signs of oil or gasoline leaks.
• Remove any excessive dirt or debris, especially around the engine muffler, and recoil starter.
• Look for signs of damage.
• Check that all nuts, bolts, screws, hose connectors and clamps are tightened.
Check the Suction and Discharge Hoses
• Check the general condition of the hoses. Be sure the hoses are in serviceable condition before
connecting them to the pump. Remember that the suction hose must be reinforced construction to
prevent hose collapse.
• Check that the sealing washer in the suction hose connector is in good condition.
• Check that the hose connectors and clamps are securely installed.
• Check that the strainer is in good condition and is installed on the suction hose.
Check the Engine
• Check the engine oil level. Running the engine with a low oil level can cause engine damage.
• Check the air filter. A dirty air filter will restrict air flow to the carburetor, reducing engine and pump
performance.
• Check the fuel level. Starting with a full tank will help to eliminate or reduce operating interruptions
for refueling.
5. SET UP
PUMP PLACEMENT
For best pump performance, place the pump near the water level, and use hoses that are no longer
than necessary. That will enable the pump to produce the greatest output with the least
self-priming time.
As head (pumping height) increases, pump output decreases. The length, type, and size of the
suction and discharge hoses can also significantly affect pump output.
Discharge head capability is always greater than suction head capability, so it is important for
suction head to be the shorter part of total head.
Minimizing suction head (placing the pump near the water level) is also very important for reducing
self-priming time. Self-priming time is the time it takes the pump to bring water the distance of the
suction head during initial operation.
SUCTION HOSE INSTALLATION
Use the hose, hose connector and hose clamp provided with the pump. The suction hose must be
reinforced with a noncollapsible wall or braided wire construction to prevent suction hose collapse.
Original instruction
The suction hose should be no longer than necessary. Pump performance is best when the pump is
near the water level, and the hoses are short.
Never use a suction hose with an inside diameter less than 25 mm (1 inch).
Use a hose clamp to securely fasten the hose connector to the suction hose in order to prevent air
leakage and loss of suction. Verify that the hose connector sealing washer is in good condition.
Install the strainer (provided with the pump) on the other end of the suction hose, and secure it with a
hose clamp. The strainer will help to prevent the pump from becoming clogged or damaged by debris.
Securely tighten the hose connector on the pump suction port.
DISCHARGE HOSE INSTALLATION
Attach a hose and hose connector to the pump’s discharge port. It is best to use a short,
large-diameter hose, because this will reduce fluid friction and improve pump performance. A long
or small-diameter hose will increase fluid friction and reduce pump output. If the discharge hose is
equipped with a shutoff valve or nozzle, do not shut off the discharge water for a long period of
time, as that could cause the pump to overheat.
FUEL
WARNING
• Gasoline is very flammable. Avoid smoking or bringing any flame or sparks near fuel.
• Wipe up all spills before starting the engine.
• Make sure to stop the engine and allow it cool before refueling the unit.
• Keep open flames away from the area where fuel is handled or stored.
IMPORTANT
• Never use oil for 4 cycle engine use or water cooled 2-cycle engine.
• Never use "FUEL WITH NO OIL (RAW GASOLINE)".
• Never use fuel laced with water.
• Mixed fuels which have been left unused for a period of one month or more may clog the
carburetor or result in the engine failing to operate properly. Put remained fuel into an air-tight
container and keep it in the dark and cool room.
• Please ask for “mixed gasoline for air-cooled 2-cycle engines” at your nearest gas station, or use
fuel made by putting unleaded gasoline for automobiles and air-cooled 2-cycle engine oil into a
mixing container in accordance with the following ratios and then shaking to mix well.
Mixing ratios: 40:1 (100 ml of oil for every 4 liters of gasoline)
6. OPERATION
PRIMING THE PUMP
Before starting the engine, remove the filler cap from the pump chamber, and completely fill the
pump
chamber with water. Reinstall the filler cap, and tighten it securely.
NOTE
Operating the pump dry will destroy the pump seal. If the pump has been operated dry, stop the
engine
immediately, and allow the pump to cool before priming.
STARTING ENGINE
1. Rest the unit on a flat, firm place. Keep the cutting head off the ground and clear of surrounding
objects
as it will start rotating upon starting of the engine.
2. To start a cold engine, move the choke lever to the CLOSED position.
3. Move the throttle lever away from the IDLE position, but no further than the halfway point.
4. Set the ignition switch to the “start” position.
5. While holding the unit firmly, pull out the starter rope quickly until engine fires. IMPORTANT
Avoid pulling the rope to its end or returning it by releasing the knob. Such actions can cause
starter failures.
6. Move the choke lever to the open position. And pull out the starter rope quickly to start engine.
7. Allow the engine to warm up for several minutes before starting operation.
NOTE
1. When restarting the engine immediately after stopping it, leave the choke open and push the
primer
pump several times.
2. Over-choking can make the engine hard to start due to excess fuel. When the engine failed to
start after
several attempts, open the choke and repeat pulling the rope, or remove the spark plug and dry it.
SETTING ENGINE SPEED
After starting the engine, move the throttle lever to the HIGH position for self-priming, and check
pump output.
Pump output is controlled by adjusting engine speed. Moving the throttle lever in the HIGH
direction will increase pump output, and moving the throttle lever in the LOW direction will
decrease pump output.
STOPPING ENGINE
1. Move the throttle lever to the LOW position and run the engine for a half minute.
2. Shift the ignition switch to the STOP position.
NOTE
• Except for an emergency, avoid stopping the engine while pulling the throttle lever.
• After use, remove the pump drain plug, and drain the pump chamber. Remove the filler cap, and
flush the pump chamber with clean, fresh water. Allow the water to drain from the pump chamber,
then reinstall the filler cap and drain plug.
ADJUSTING IDLING SPEED
• When the engine tends stop frequently at idling mode, turn the adjusting screw clockwise.
• When the cutting head keeps rotating after releasing the trigger, turn the adjusting screw
NOTE
Warm up the engine before adjusting the idling speed.
7. MAINTENANCE
Maintenance, replacement, or repair of the emission control device and systems may be performed
by any non-road engine repair establishment or individual.
WARNING
Always be sure to stop the engine before inspecting the unit for problems or performing
maintenance.
AIR FILTER
The air filter, if clogged, will reduce the engine performance. Monthly check and clean the filter
element in warm, soapy water as required. Dry completely before installing. If the element is broken
or shrunk, replace with a new one. (MA1)
FUEL FILTER
When the engine runs short of fuel supply, check the fuel cap and the fuel filter for blockage. (MA2)
SPARK PLUG
•Starting failure and mis-firing are often caused by a fouled spark plug. Periodically clean the spark
plug and check that the spark gap is in the correct range. (MA3)
When you take off the spark plug, twist (1) and pull off the cap (2). (MA4)
Note that using any spark plugs 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: 9.8~11.8 N.m
• MUFFLER
- Inspect periodically, the muffler for loose fasteners, any damage or corrosion. If any sign of exhaust
leakage is found, do not use the brush cutter and have it repaired immediately.
- Note that failing to do so may result in the engine catching on fire.
• INTAKE AIR COOLING VENT
Check the intake air cooling vent and the area around the cylinder cooling fins after every 25 hours of
use for blockage, and remove any waste which has attached itself. Note that it is necessary to remove
the plug guard shown in Figure (MA4) in order to be able to view the upper part of the cylinder.
IMPORTANT
If waste gets stuck and causes blockage around the intake air cooling vent or between the cylinder
fins, it may cause the engine to overheat, and that in turn may cause mechanical failure on the part of
the brush cutter. (MA6)
PROCEDURES TO BE PERFORMED AFTER EVERY 10 HOURS OF USE
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 at the same time. (MA7)
2. Tighten all screws, bolts, and fittings.
3. Check to see if any oil or grease has worked its way in between the clutch lining and drum, and if it
has wiped it away using oil-free, lead-free gasoline
8. STORAGE
• Aged fuel is one of major causes of engine starting failure. Before storing the unit, empty the fuel
tank and run the engine until it uses all the fuel left in the fuel line and the carburetor. Store the unit
indoor taking necessary measures for rust prevention.
9. TROUBLESHOOTING GUIDE
