Pulsar PWP20 User manual

2 And 3 Inch
Water Pump
Operating Instructions
Please read and save these instructions. Read carefully before attempting to assemble, install, operate or maintain the
product described. Protect yourself and others by observing all safety information. Failure to comply with instructions
could result in personal injury and/or property damage! Return instructions for future reference.
Model # PWP20
Model # PWP30
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Specifications
Important Safety Information
Component & Control Locations
Before Operation
Is the pump ready to go?
Check the pump
Check the hoses
Check the engine
Operation
Pump placement
Suction hose installation
Discharge hose installation
Priming the pump
Starting the engine
Setting the engine speed
Stopping the engine
Servicing the pump
Maintenance safety
Safety precautions
Maintenance schedule
Refueling
Fuel recommendations
Oil recommendations
Oil level check
Oil change
Air filter inspection and service
Sediment cup cleaning
Spark plug service
Idle speed adjustment
Storing the pump
Cleaning
Fuel
Adding fuel stabilizer
Draining the fuel
Engine oil
Storage precautions
Removal from storage
Transporting
Troubleshooting
High Altitude Operation
Replacement parts
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Operating Instructions & Parts Manual
2Inch & 3Inch Water Pump
Contents
1

Operating Instructions & Parts Manual
Model PWP20
2 Inch & 3 Inch Water Pump
2
Length x Width x Height 515 x 440 x 425 (mm), 20.2 x 17.3 x 16.7 (in)
Dry Weight 23 kg., 50.7 lbs.
Engine type 4 Stroke, Overhead Valve, Single Cylinder
Displacement [Bore x Stroke] 208cc
Valve clearance IN: 0.15 0.02 mm (cold)
EX: 0.20 0.02 mm (cold)
Spark plug NGK: BPR6ES DENSO:W20EPR-U
Spark plug gap 0.028-0.031 in.
Idle speed 1,400 rpm
Max output 3,600 RPM
Max torque 8.0 ft.-lbs. (10.8 NM) @ 2,500 rpm
Engine oil SAE 10W-30, API SJ or SL, for general use
Engine oil capacity 0.63 Qt., 0.6 (L)
Fuel Unleaded gasoline with a pump octane rating of 86 or higher
Fuel tank capacity 0.95 gal., 3.6 (L)
Fuel consumption 0.51 GPH, 290 (g/HP-Hour)
Cooling system Forced air
Ignition system Transistorized Magneto
PUMP
Suction port diameter 2 in, 50 (mm)
Discharge port diameter 2 in, 50 (mm)
Total head 105 ft
Suction head 24 ft
Discharge capacity 123 gal/min
Pressure (maximum) 35.5 psi
Continuous running time Approximately 2-3 hours (actual time varies with pump load)
Specifications
+200
-150

Operating Instructions & Parts Manual
Model PWP30
2 Inch & 3 Inch Water Pump
3
Length x Width x Height 515 x 440 x 425 (mm), 20.2 x 17.3 x 16.7 (in)
Dry Weight 25 kg., 55 lbs.
Engine type 4 Stroke, Overhead Valve, Single Cylinder
Displacement [Bore x Stroke] 208cc
Valve clearance IN: 0.15 0.02 mm (cold)
EX: 0.20 0.02 mm (cold)
Spark plug NGK: BPR6ES DENSO:W20EPR-U
Spark plug gap 0.028-0.031 in.
Idle speed 1,400 rpm
Max output 3,600 RPM
Max torque 9.6 ft.-lbs. (13 NM) @ 2,500 rpm
Engine oil SAE 10W-30, API SJ or SL, for general use
Engine oil capacity 0.63 Qt., 0.6 (L)
Fuel Unleaded gasoline with a pump octane rating of 86 or higher
Fuel tank capacity 0.95 gal., 3.6 (L)
Fuel consumption 0.51 GPH, 290 (g/HP-Hour)
Cooling system Forced air
Ignition system Transistorized Magneto
PUMP
Suction port diameter 3 in, 80 (mm)
Discharge port diameter 3 in, 80 (mm)
Total head 92 ft
Suction head 24 ft
Discharge capacity 229 gal/min
Pressure (maximum) 45 psi
Continuous running time Approximately 2-3 hours (actual time varies with pump load)
Specifications
+200
-150

Operating Instructions & Parts Manual
2Inch & 3Inch Water Pump
4
Important Safety Information
Most accidents can be prevented if you follow all instructions in this manual and on the pump. The most common
hazards are discussed below, along with the best way to protect yourself and others.
Warning! The warnings, cautions and instructions discussed in the instruction manual
cannot cover all possible conditions and situations that may occur. It must be understood by the
operator that common sense and caution are factors which cannot be built into this product, but must
be supplied by the operator.
• Read and understand this owner’s manual before operating the pump. Failure to do so could result in
personal injury or equipment damage.
• This pump is designed to pump only water that is not intended for human consumption. Other uses
can result in injury to the operator or damage to the pump and other property. Pumping flammable
liquids, such as gasoline or fuel oils, can result in fire or explosion, causing serious injury. Pumping sea
water, beverages, acids, chemical solutions, or any other liquid that promotes corrosion can damage
the pump.
• Know how to stop the pump quickly, and understand the operation of all controls. Never permit anyone to
operate the pump without proper instructions.
•Do not allow children to operate the pump. Keep children and pets away from the area of operation.
• Dress properly. Do not wear loose clothing or jewelry. Contain long hair. Keep your hair, clothing, and gloves
away from moving parts. Loose clothing, jewelry, long hair can be caught in moving parts.
• Do not operate pump in explosive atmospheres, such as in the presence of flammable liquids, gases, or dust. The
engine creates sparks, which may ignite the dust or fumes.
• Gasoline is extremely flammable, and gasoline vapor can explode. Refuel outdoors, in a well- ventilated area,
with the pump stopped. Never smoke near gasoline, and keep other flames and sparks away. Always store
gasoline in an approved container. If any fuel is spilled, make sure the area is dry before starting the pump.
• The muffler becomes very hot during operation and remains hot for a while after stopping the engine. Be careful
not to touch the muffler while it is hot. Let the engine cool before storing the pump indoors.
• To prevent fire hazards and to provide adequate ventilation for stationary equipment applications, keep the
pump at least 3 feet away from building walls and other equipment during operation. Do not place flammable
objects close to the pump.
• Exhaust gas contains poisonous carbon monoxide. Avoid inhalation of exhaust gas. Never run the pump in a
closed garage or confined area.
• Do not overload the pump. Use the correct pump for your application. The correct pump will do the job better
and safer at the rate for which it is designed.
Save This Manual
You will need this manual for the safety warning and precautions, operating, inspection, maintenance
and cleaning procedures, parts list and assembly diagrams. Keep your receipt. Keep this manual in a safe
and dry place for future reference.

Operating Instructions & Parts Manual
2Inch & 3Inch Water Pump
5
Component & Control Locations
Throttle Lever
Choke Lever
Fuel Valve Lever
Starter Grip
Fuel Tank Gap
Discharge Port
Oil Fill Cap/Dipstick
On/Off Switch
Priming Water
Filler Cap
Intake Port
Pump Water
Drain Plug Oil Drain Plug
Muffler
Air Cleaner
Strainer

Operating Instructions & Parts Manual
2Inch & 3Inch Water Pump
6
Before Operation
Is the pump ready to go?
For your safety, and to maximize the service life of your equipment, it is very important to take a few moments
before you operate the pump to check its condition. Be sure to take care of any problem you find, or have a
qualified mechanic correct it, before you operate the pump.
Warning! Improperly maintaining this pump, or failing to correct a problem before
operation, could cause a malfunction in which you could be seriously injured. Always perform a
pre-operation inspection before each operation, and correct any problem.
Before you begin your pre-operation checks, be sure the pump is level and the engine switch is in the OFF position.
Check the general condition of the pump
• Look around and underneath the pump for signs of oil or gasoline leaks.
• Check that all nuts, bolts, screws, hose connectors and clamps are tightened.
• Remove any excessive dirt or debris, especially around the engine muffler and recoil starter.
• Look for signs of damage.
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 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. The oil sensor will
automatically stop the engine before the oil level falls below safe limits. However, to avoid the inconvenience of
an unexpected shutdown, always check the engine oil level before startup.
• Check the air filter. A dirty air filter will restrict air flow to the carburetor, reducing engine performance.
• Check the fuel level. Starting with full tank will help to eliminate or reduce operating interruptions for refueling.
Warning! Carbon monoxide gas is toxic. Breathing it can cause unconsciousness and even
kill you. Avoid any areas or actions that expose you to carbon monoxide.

Operating Instructions & Parts Manual
2Inch & 3Inch Water Pump
7
Operation
Before operating the engine for the first time, please review the Important Safety Information and Before
Operation.
Pump only water that is not intended for human consumption. Pumping flammable liquids, such as gasoline or
fuel oils, can result in fire or explosion, causing serious injury. Pumping seawater, beverages, acids, chemical
solutions, or any other liquid that promotes corrosion can damage the pump.
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.
As head (pumping height) increases, pump output decreases. Maximum head specifications and pump
performance curves are shown in the table on page 2-4. 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.
Discharge Head
Suction Head
Total
Head
Total
Head

Operating Instructions & Parts Manual
2Inch & 3Inch Water Pump
8
Suction Hose Installation
Use the commercially available hose and hose connector with the hose clamp provided with the pump. The
suction hose must be reinforced with a non-collapsible wall or braided wire construction.
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.
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 washers 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.
Intake Port
Sealing Washer
Hose Coupler
Hose Clamp ring
Hose clamp
Suction hose
Hose Connector
Suction hose
Hose clamp
Strainer
Hose Clamp

Operating Instructions & Parts Manual
2Inch & 3Inch Water Pump
9
Discharge Hose Installation
Use a commercially available hose and hose connector, and
clamp provided with the pump.
It is best to use a short, large-diameter hose, because that
will reduce fluid friction and improve pump output. A long
or small-diameter hose will increase fluid friction and reduce
pump output.
Tighten the hose clamp securely to prevent the discharge
hose from disconnecting under high pressure.
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.
Hose Clamp
Priming Water
Filler Cap
Hose Clamp

Operating Instructions & Parts Manual
2Inch & 3Inch Water Pump
10
Starting The Engine
1) Prime the pump
2) Move the fuel valve lever to the ON position. The fuel
valve opens and closes the passage between the fuel
tank and the carburetor. The fuel valve lever must be in
the ON position for the engine to run.
3) To start a cold engine, move the choke lever to the
close position. To restart a warm engine, leave the
choke lever in the open position. The choke lever opens
and closes the choke valve in the carburetor. The closed
position enriches the fuel mixture for starting a cold
engine. The open position provides the correct fuel
mixture for operation after starting, and for restarting a
warm engine.
4) Move the throttle lever away from the slow position,
about 1/3 of the way toward the fast position. The
throttle controls engine speed. Moving the throttle
lever in one direction or the other makes the engine
run faster or slower.
Fuel Valve Lever
OFF
Choke Lever
Throttle Lever
Slow
Open
Close

Operating Instructions & Parts Manual
2Inch & 3Inch Water Pump
11
Starting The Engine
5) Turn the engine switch to the ON position. The engine
switch enables and disables the ignition system. The
engine switch must be on the ON position for the engine
to run. Turning the engine switch to the OFF position
stops the engine.
6) Operate the Recoil Starter: Pull the starter grip lightly
until you feel resistance, then pull briskly. Return the
starter grip gently. Pulling the starter grip operates the
recoil starter to crank the engine.
7) If the Choke lever has been moved to the Closed
position to start the engine, gradually move it to the
Open position as the engine warms up.
Engine Switch
Starter Grip
Choke Lever
Open
Close
ON

Operating Instructions & Parts Manual
2 Inch & 3 Inch Water Pump
12
Setting Engine Speed
Position the throttle lever for the desired engine speed.
Moving the throttle lever in the directions shown makes the engine run faster or slower.
After starting the engine, move the throttle lever to the Fast position and check pump output.
Pump output is controlled by adjusting engine speed. Moving the throttle lever in the Fast direction will increase
pump output, and moving the throttle lever in the Slow direction will decrease pump output.
Warning! Carbon monoxide gas is toxic. Breathing it can cause unconsciousness and even
kill you. Avoid any areas or actions the expose you to carbon monoxide.
Throttle Lever
Fast
Slow

Operating Instructions & Parts Manual
2Inch & 3Inch Water Pump
13
1) Move the throttle lever to the Slow position.
2) Turn the engine switch to the OFF position.
3) Turn the fuel valve lever to the Off position. When the
pump is not in use, leave the fuel valve lever in the OFF
position to prevent carburetor flooding and to reduce
the possibility of fuel leakage.
Stopping The Engine
To stop the engine in an emergency, simply turn the engine switch to the OFF position. Under normal conditions,
use the following procedure.
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.
Throttle Lever
Engine Switch
Fuel Valve Lever
Slow
OFF
ON
OFF

Operating Instructions & Parts Manual
2Inch & 3Inch Water Pump
14
Servicing The Pump
The Importance Of Maintenance
Good maintenance is essential for safe, economical, and trouble-free operation. It will also help reduce air
pollution.
Warning! Improperly maintaining this pump, or failure to correct a problem before
operation, can cause a malfunction in which you can be seriously hurt or killed.
Always follow the inspection and maintenance recommendations and schedules in this owner’s manual
To help you properly care for your pump, the following pages include a maintenance schedule, routine inspection
procedures, and simple maintenance procedures using basic hand tools. Other service tasks that are more difficult,
or require special tools, are best handled by professionals and are normally performed by a qualified mechanic.
The maintenance schedule applies to normal operating conditions. If you operate your engine under unusual
conditions, such as sustained high load or high temperature operation, or use in unusually wet or dusty conditions,
consult your servicing dealer for recommendations applicable to your individual needs and use.
Maintenance, replacement or repair of emission control devices and systems may be done by any engine repair
establishment or individual, using parts that are “certified” to EPA/CARB standards.
Maintenance Safety
Some of the most important safety precautions follow. However, we cannot warn you of every conceivable hazard
that can arise in performing maintenance. Only you can decide whether or not you should perform a given task.
Safety Precautions
• Make sure engine is Off before you begin any maintenance or repairs. This will eliminate several potential
hazards:
Carbon monoxide poisoning from engine exhaust.
Be sure there is adequate ventilation whenever you operate the engine.
Burns from hot parts.
Let the engine and exhaust system cool before touching.
Injury from moving parts.
Do not run the engine unless instructed to do so.
• Read the instructions before you begin and make sure you have the tool and skills required.
• To Reduce the possibility of fire or explosion, be careful when working around gasoline. Use only a nonflam
mable solvent, not gasoline, to clean parts. Keep cigarettes, sparks and flames away from all fuel-related parts.
To ensure the best quality and reliability, use only new, original replacement parts or their equivalents for repair
and replacement.

(1)
(2)
(2)
(2)
(2)
(2)
(2)
(1)
Every 2 years (replace if necessary) (2)
Operating Instructions & Parts Manual
2Inch & 3Inch Water Pump
15
Regular Service
Period (3) Item
Each Use
Perform at every
indicated month or
operating hour interval,
whichever comes first.
Maintenance Schedule
First month or
20 Hours
Every 3 months
or 50 Hours
Every 6 months
or 100 Hours
Every year or 300
Hours
Check Level
Engine Oil
Reduce Gear Oil
(Applicable Types)
Air Filter
Sediment Cup
Sparkplug
Spark Arrester
(Optional Parts)
Idle Speed
Valve Clearance
Combustion Chamber
Fuel Tank & Filter
Fuel Tube
Impeller
Impeller Clearance
Pump Inlet Valve
Check
Check
Check
Check
Check
Clean
Replace
Replace
Clean
Clean
Clean
Clean
Check-Adjust
Check-Adjust
Check-Adjust
Change
Check Level
Change
After every 500 Hours (2)
• Emission-related items.
1) Service more frequently when used in dusty areas.
2) These items should be serviced by a qualified mechanic, unless you have the proper tools and are mechanically
proficient.
3) For commercial use, log hours of operation to determine proper maintenance intervals.

Operating Instructions & Parts Manual
2Inch & 3Inch Water Pump
16
Refueling
With the engine stopped and on a level surface, remove the fuel tank cap and check the fuel valve. Refill the tank
if the fuel level is low.
Warning! Gasoline is highly flammable and explosive. You can be burned or seriously
injured when handling fuel.
• Stop the engine and keep heat, sparks, and flame away.
• Handle fuel only outdoors.
• Wipe up spills immediately.
Refuel in a well-ventilated area before starting the engine. If the engine has been running, allow it to cool. Refuel
carefully to avoid spilling fuel. Do not fill the fuel tank completely. Fill tank to approximately 1 inch below the top
of the fuel tank to allow for fuel expansion. It may be necessary to lower the fuel level depending on operating
conditions. After refueling, tighten the fuel tank cap securely.
Never refuel the engine inside a building where gasoline fumes may reach flames or sparks. Keep gasoline away
from appliance pilot lights, barbecues, electric appliances, power tools, etc.
Spilled fuel is not only a fire hazard, it causes environmental damage. Wipe up spills immediately.
Note: Fuel can damage paint and plastic. Be careful not to spill fuel when filling your fuel tank.
Damage caused by spilled fuel is not covered under warranty.
Fuel Recommendations
Use unleaded gasoline with a pump octane rating of 86 or higher.
These engines are certified to operate on unleaded gasoline. Unleaded gasoline produces fewer engine and spark
plug deposits and extends exhaust system life.
Never use stale or contaminated gasoline or an oil/gasoline mixture. Avoid getting dirt or water in the fuel tank.
Occasionally you may hear a light “knocking” or “pinging” (metallic rapping noise) while operating under heavy
loads. This is no cause for concern.
If knocking or pinging occurs at a steady engine speed, under normal load, change brands or use a higher octane
gasoline. If knocking or pinging persist, see an authorized qualified mechanic.
Note: Running the engine with persistent knocking or pinging can cause engine damage. Running
the engine with persistent knocking or pinging is considered misuse, and the warranty does not cover parts
damaged by misuse.
Maximum Fuel Level
Top Of Fuel Tank

Operating Instructions & Parts Manual
2Inch & 3Inch Water Pump
17
Oil Recommendations
Oil is a major factor affecting performance and service life. Use 4 stroke automotive detergent oil.
SAE 10W-30 is recommended for general use. Other viscosities shown in the chart may be used when the average
temperature in your area is within the recommended range.
The SAE oil viscosity and service classification are in the API label on the oil container. The manufacture
recommends that you use API SERVICE category SJ or SL oil.
Oil Level Check
Check the engine oil level with the engine stopped and in a level position.
1) Remove the filler cap/dipstick and wipe it clean.
2) Insert and remove the dipstick with out screwing it into the filler neck. Check the oil level shown on the dipstick.
3) If the oil level is low, fill to the edge of the oil filler hole with the recommended oil.
4) Screw in the filler cap/dipstick securely.
Note: Running the engine with low oil level can cause engine damage.
The oil sensor will automatically stop the engine before the oil level falls below safe limit. However, to avoid
inconvenience of an unexpected shutdown, always check the engine oil level before startup.
-20º 0º 20º 40º 60º 80º 100ºF
30
10W-30
5W-30
Oil Fill
Cap/Dipstick
Upper Limit
Lower Limit

Operating Instructions & Parts Manual
2Inch & 3Inch Water Pump
18
Oil Change
Drain the used oil while the engine is warm. Warm oil drains quickly and completely.
1. Place a suitable container below the engine to catch the used oil, then remove the filler cap/dipstick, drain plug,
and washer.
2. Allow the used oil to drain completely, then reinstall the drain plug, washer, and tighten drain plug securely.
Please dispose of used motor oil in a manner that is compatible with the environment. We suggest you take
used oil in a sealed container to your local recycling center or service station for reclamation. Do not throw it in
the trash; pour it on the ground, or down a drain.
3. With the engine in a level position, fill to the outer edge of the oil filler hole with the recommended oil.
Note: Running the engine with a low oil level can cause engine damage.
The oil sensor will automatically stop the engine before the oil level falls below the safe limit. However, to avoid the
inconvenience of an unexpected shutdown, fill to the upper limit, and check the oil level regularly.
4. Screw in the filler cap/dipstick securely.
Sealing Washer
Oil Level
Spark Plug
Ignition Control
Module (ICM)
Oil Level Switch Oil Sensor Relay
Engine Switch
Drain Plug
Oil Cap/Dipstick
Oil Sensor Diagram
Black Black/Red
Yellow

Operating Instructions & Parts Manual
2Inch & 3Inch Water Pump
19
Air Filter Inspection & Service
A dirty filter will restrict air flow to the carburetor, reducing engine performance. If you operate the engine in very
dusty areas, clean the air filter more often than specified in the maintenance schedule.
Note: Operating the engine without an air filter, or with a damaged air filter, will allow dirt
to enter the engine, causing rapid engine wear. This type of damage is not covered by the warranty.
Wing Nut
Air Cleaner
Cover
Foam Filter
Grid
Gasket
1. Remove the wing nut, and remove the air cleaner cover.
2. Carefully remove plastic grid from the bottom of the cover.
3. Carefully remove the foam air filter from the cover. Wash
the filter in warm, soapy water, rinse, allow to dry
thoroughly.
4. Wipe dirt from the inside of the air cleaner base and cover,
using a moist rag. Be careful to prevent dirt from entering
the air duct that leads to carburetor.
5. Insert the cleaned, dry or new foam air filter in the cover
and replace grid.
6. Reinstall the air cleaner assembly. Be sure the gasket is in
place beneath the air filter.
7. Tighten the air filter wing nut securely.