Simpson Water Shotgun WS5050H 49-State User manual

Part No. 7110656 RevDSept 2019
If your pressure washer is not working properly or if there are parts missing or broken,
please DO NOT RETURN IT TO THE PLACE OF PURCHASE. Contact our customer
service department at 1-877-362-4271 or www.simpsoncleaning.com
IMPORTANT: Please make certain that the person who is to use this equipment carefully
reads and understands these instructions before operating.
SAVE THIS MANUAL FOR FUTURE REFERENCE
PROFESSIONAL PRESSURE WASHER
INSTRUCTION MANUAL

2- ENG
SAFETY GUIDELINES - DEFINITIONS
This manual contains information that is important for you to know and understand.
This information relates to protecting YOUR SAFETY and PREVENTING
EQUIPMENT PROBLEMS. To help you recognize this information, we use the
symbols below. Please read the manual and pay attention to these symbols.
DANGER: Indicates an imminently hazardous situation which, if not avoided,
will result in death or serious injury.
WARNING: Indicates a potentially hazardous situation which, if not avoided,
could result in death or serious injury.
CAUTION: Indicates a potentially hazardous situation which, if not avoided, may
result in minor or moderate injury.
NOTICE: Indicates a practice not related to personal injury which, if not avoided,
may result in property damage.
IMPORTANT SAFETY INSTRUCTIONS
DANGER: Carbon Monoxide. Using an engine indoors can kill you in
minutes. Engine exhaust contains high levels of carbon monoxide (CO), a
poisonous gas you cannot see or smell. You may be breathing CO even if you
do not smell engine exhaust.
•NEVER use an engine inside homes, garages, crawlspaces or other partly
enclosed areas. Deadly levels of carbon monoxide can build up in these areas.
Using a fan or opening windows and doors does NOT supply enough fresh air.
•ONLY use outdoors and far away from open windows, doors and vents. These
openings can pull in engine exhaust.
• Even when the engine is used correctly, CO may leak into your home. ALWAYS use
a battery-powered or battery backup CO alarm in your house. Read and follow all
directions for CO alarm before using. If you feel sick, dizzy or weak at anytime,
move to fresh air immediately. See a doctor. You could have carbon monoxide
poisoning.
WARNING: Do not operate this unit until you read this instruction manual and
the engine instruction manual for safety, operation and maintenance instructions. If
you have any questions regarding the product, please contact our customer
service department at www.simpsoncleaning.com.
DANGER: Risk of injection or severe injury. Keep clear of nozzle. Do not
direct discharge stream at persons or live animals. This product is to be used
only by trained operators.
WARNING: This product and its exhaust contain chemicals known to the State
of California to cause cancer, birth defects or other reproductive harm. In addition,
some cleaning products and dust contain chemicals known to the State of
California to cause cancer, birth defects or other reproductive harm. Wash hands
after handling.

3- ENG
WARNING: This product may not be equipped with a spark-arresting muffler.
If the product is not equipped and will be used around flammable materials or
on land covered with materials such as agricultural crops, forest, brush, grass or
other similar items, then an approved spark arrester must be installed and is legally
required in the state of California. It is a violation of California statutes section
130050 and/or sections 4442 and 4443 of the California Public Resources Code,
unless the engine is equipped with a spark arrester, as defined in section 4442, and
maintained in effective working order. Spark arresters are also required on some
U.S. Forest Service land and may also be legally required under other statutes and
ordinances.
SAVE THESE INSTRUCTIONS
DANGER: RISK OF EXPLOSION OR FIRE
WHAT CAN HAPPEN HOW TO PREVENT IT
• Spilled gasoline and it’s vapors can
become ignited from cigarette sparks,
electrical arcing, exhaust gases and
hot engine components such as the
muffler.
• Shut off engine and allow it to cool before
adding fuel to the tank.
• Use care in filling tank to avoid spilling fuel.
Move pressure washer away from fueling
area before starting engine.
• Heat will expand fuel in the tank which
could result in spillage and possible
fire explosion.
• Keep maximum fuel level 1/2" (12.7mm)
below bottom of filler neck to allow for
expansion.
• Operating the pressure washer in an
explosive environment could result in
a fire.
• Operate and fuel equipment in well-
ventilated areas free from obstructions.
Equip areas with fire extinguisher suitable
for gasoline fires.
• Materials placed against or near the
pressure washer can interfere with
its proper ventilation features causing
overheating and possible ignition of
the materials.
• Never operate pressure washer in an area
containing dry brush or weeds.
• Muffler exhaust heat can damage
painted surfaces, melt any material
sensitive to heat (such as siding,
plastic, rubber, vinyl or the pressure
hose, itself), and damage live plants.
• Always keep pressure washer a minimum
of 4' (1.2m) away from surfaces (such as
houses, automobiles or live plants) that
could be damaged from muffler exhaust
heat.
• Improperly stored fuel could lead to
accidental ignition. Fuel improperly
secured could get into the hands of
children or other unqualified persons.
• Store fuel in an OSHA approved contain-
er, in a secure location away from work
area.
• Use of acids, toxic or corrosive
chemicals, poisons, insecticides, or
any kind of flammable solvent with
this product could result in serious
injury or death.
• Do not spray flammable liquids.

4- ENG
DANGER: RISK TO BREATHING (ASPHYXIATION)
WHAT CAN HAPPEN HOW TO PREVENT IT
• Breathing exhaust fumes will cause
serious injury or death! Engine
exhaust contains carbon monoxide,
an odorless and deadly gas.
• Operate pressure washer in a well-
ventilated area. Avoid enclosed areas
such as garages, basements, etc.
• Never operate unit in or near a location
occupied by humans or animals.
• Some cleaning fluids contain
substances which could cause injury
to skin, eyes or lungs.
• Use only cleaning fluids specifically rec-
ommended for high pressure washers.
Follow manufacturers recommendations.
Do not use chlorine bleach or any other
corrosive compound.
DANGER: RISK OF FLUID INJECTION AND LACERATION
WHAT CAN HAPPEN HOW TO PREVENT IT
• Your pressure washer operates at fluid
pressures and velocities high enough
to penetrate human and animal flesh
which could result in amputation or
other serious injury. Leaks caused
by loose fittings or worn or damaged
hoses can result in injection injuries.
DO NOT TREAT FLUID INJECTION
AS A SIMPLE CUT! See a physician
immediately!
• Inspect the high pressure hose regularly.
Replace the hose immediately if it is
damaged, worn, has melted from
contacting the engine, or shows any signs
of cracks, bubbles, pinholes, or other
leakage. Never grasp a high pressure
hose that is leaking or damaged.
• Never touch, grasp or attempt to cover a
pinhole or similar water leak on the high
pressure hose. The stream of water IS
under high pressure and WILL penetrate
skin.
• Never place hands in front of nozzle.
• Direct spray away from self and others.
• Make sure hose and fittings are tightened
and in good condition. Never hold onto
the hose or fittings during operation.
• Do not allow hose to contact muffler.
• Never attach or remove wand or hose
fittings while system is pressurized.
• When using replacement lances or guns
with this pressure washer, DO NOT use
a lance and/or lance/gun combination
that is shorter in length than what was
provided with this pressure washer as
measured from the nozzle end of the
lance to the gun trigger.
• Injuries can result if system pressure
is not reduced before attempting
maintenance or disassembly.
• To relieve system pressure, shut off
engine, turn off water supply and pull gun
trigger until water stops flowing.
•Use only accessories rated equal to or
higher than the rating of the pressure
washer.

5- ENG
DANGER: RISK OF INJURY FROM SPRAY
WHAT CAN HAPPEN HOW TO PREVENT IT
• High-velocity fluid spray can cause
objects to break, projecting particles
at high speed.
• Always wear ANSI-approved Z87.1
safety glasses. Wear protective clothing
to protect against accidental spraying.
• Never point wand at or spray people or
animals.
• Light or unsecured objects can
become hazardous projectiles.
• Always secure trigger lock when wand
is not in service to prevent accidental
operation.
• Never permanently secure trigger in pull-
back (open) position.
DANGER: RISK OF UNSAFE OPERATION
WHAT CAN HAPPEN HOW TO PREVENT IT
• Unsafe operation of your pressure
washer could lead to serious injury or
death to you or others.
• Do not use chlorine bleach or any other
corrosive compound.
• Become familiar with the operation and
controls of the pressure washer.
• Keep operating area clear of all persons,
pets and obstacles.
• Do not operate the product when fatigued
or under the influence of alcohol or drugs.
Stay alert at all times.
• Never compromise the safety features of
this product.
• Do not operate machine with missing,
broken or unauthorized parts.
• ALWAYS keep guards or shields in place.
Replace any that must be removed for
service or that may be damaged.
• Never leave wand unattended while unit is
running.
• If proper starting procedure is not
followed, engine can kickback causing
serious hand and arm injury.
• If engine does not start after two pulls,
squeeze trigger of gun to relieve pump
pressure. Pull starter cord slowly until
resistance is felt. Then pull cord rapidly to
avoid kickback and prevent hand or arm
injury.
• The spray gun/wand is a powerful
cleaning tool that could look like a toy
to a child.
• Keep children away from the pressure
washer at all times.
• Reactive force of spray will cause gun/
wand to kickback, and could cause
the operator to slip or fall or misdirect
the spray. Improper control of gun/
wand can result in injuries to self and
others.
• Do not overreach or stand on an unstable
support.
• Do not use pressure washer while
standing on a ladder.
• Grip gun/wand firmly with both hands.
Expect the gun to kickback when
triggered.

6- ENG
DANGER: RISK OF INJURY OR PROPERTY DAMAGE WHEN
TRANSPORTING OR STORING
WHAT CAN HAPPEN HOW TO PREVENT IT
• Fuel or oil can leak or spill and could
result in fire or breathing hazard.
Serious injury or death can result.
Fuel or oil leaks will damage carpet,
paint or other surfaces in vehicles or
trailers.
• Oil could fill the cylinder and damage
the engine if the unit is not stored or
transported in an upright position.
• If pressure washer is equipped with a fuel
shut-off valve, turn the valve to the OFF
position before transporting to avoid fuel
leaks. If pressure washer is not equipped
with a fuel shut-off valve, drain the fuel
from tank before transporting. Only trans-
port fuel in an OSHA-approved container.
• Always place pressure washer on a
protective mat when transporting to
protect against damage to vehicle from
leaks.
• Always transport and store unit in an
upright position. Remove pressure
washer from vehicle immediately upon
arrival at your destination.
DANGER: RISK OF ELECTRICAL SHOCK
WHAT CAN HAPPEN HOW TO PREVENT IT
• Spray directed at electrical outlets or
switches, or objects connected to an
electrical circuit, could result in a fatal
electrical shock.
• Unplug any electrically operated product
before attempting to clean it. Direct spray
away from electric outlets and switches.
DANGER: RISK OF CHEMICAL BURN
WHAT CAN HAPPEN HOW TO PREVENT IT
• Use of acids, toxic or corrosive
chemicals, poisons, insecticides, or
any kind of flammable solvent with this
product could result in serious injury or
death.
• Do not spray acids, gasoline, kerosene,
or any other flammable materials with this
product. Use only household detergents,
cleaners and degreasers recommended
for use with pressure washers.
• Wear protective clothing to protect
eyes and skin from contact with sprayed
materials.

7- ENG
WARNING: RISK OF BURSTING
WHAT CAN HAPPEN HOW TO PREVENT IT
• Over inflation of tires could result
in serious injury and property
damage.
• Use a tire pressure gauge to check the
tires pressure before each use and while
inflating tires; see the tire sidewall for the
correct tire pressure.
NOTE: Air tanks, compressors and similar
equipment used to inflate tires can fill small
tires similar to these very rapidly. Adjust
pressure regulator on air supply to no more
than the rating of the tire pressure. Add air
in small increments and frequently use the
tire gauge to prevent over inflation.
• High-velocity fluid spray directed
at pneumatic tire sidewalls (such
as found on automobiles, trailers
and the like) could damage the
sidewall resulting in serious injury.
• On pressure washers rated above
1600 PSI (11032 kPa) use the widest
fan spray (40º nozzle) and keep the
spray a minimum of 8" (20 cm) from the
pneumatic tire sidewall. Do not aim spray
directly at the joint between the tire and
rim.
WARNING: RISK OF HOT SURFACES
WHAT CAN HAPPEN HOW TO PREVENT IT
• Contact with hot surfaces, such as
engine exhaust components, could
result in serious burn.
• During operation, touch only the control
surfaces of the pressure washer. Keep
children away from the pressure washer
at all times. They may not be able to
recognize the hazards of this product.
WARNING: RISK OF INJURY FROM LIFTING
WHAT CAN HAPPEN HOW TO PREVENT IT
•Serious injury and property damage
can result from lifting heavy
machines by hand.
•Do not lift heavy machines by hand.
SAVE THESE INSTRUCTIONS
FOR FUTURE USE
•Serious injury and property damage
can result from lifting machines with
ropes, straps, chains, or other lifting
devices without factory installed
lifting lugs or eyelets.
•Serious injury and property damage
can result from incorrect use of
factory installed lifting lugs or
eyelets when lifting machines.
•If your machine is equipped with factory
installed lifting lugs or eyelets, refer to
lifting instructions insert for proper lifting
procedure.
•If your machine is not equipped with
factory installed lifting lugs or eyelets,
contact your dealer to purchase and
install optional lifting lug kit, then refer to
lifting instructions insert for proper lifting
procedure.

8- ENG
GET TO KNOW THE PRESSURE WASHER
NOTE: Photographs and line drawings used in this manual are for reference
only and do not represent a specific model.
Compare the illustrations with your unit to familiarize yourself with the location of
various controls and adjustments. Save this manual for future reference.
BASIC ELEMENTS OF A PUMP
Refer to the pump manufacturer's instructions for more information.
NOTICE: The high-pressure pump was filled with oil at the factory. Always check
oil level before using. Refer to pump manufacturer for maintenance instructions.
NOTICE: The high-pressure pump is shipped with a shipping plug. Before use
remove the shipping plug and replace with supplied dipstick.
BASIC ELEMENTS OF THE GEAR BOX (if equipped)
Refer to the gear box manufacturer's instructions for more information.
NOTICE: The gear box is shipped with a shipping plug. Before use remove the
shipping plug and replace with supplied dipstick/breather cap.
NOTICE: The gearbox was filled with lube at the factory. Always check lube level
before using. Refer to gear box manufacturer for maintenance instructions.
BASIC ELEMENTS OF AN ENGINE
Refer to the Engine Owner's Manual for location and operation of enginecontrols.
NOTICE: The engine is shipped without oil. Before starting engine, add the oil
provided. Damage to the engine will occur if the engine is run without oil, this
damage will not be covered underwarranty.

9- ENG
ASSEMBLY INSTRUCTIONS (FIG. 2)
1. Locate and remove all loose parts from the carton.
2. Remove the colored quick-connect or MEG nozzles (if included) from the
plastic manual bag and insert them into correct grommet on the nozzle
holder (if equipped). Quick connect nozzles are color coded and will
match the nozzle holder label.
3. Connect wand to gun and tighten securely.
4. Attach high pressure hose to gun and tighten securely.
NOTICE: The engine is shipped without oil. Before starting engine, add the
provided oil. Damage to the engine will occur if the engine is run without oil.
This damage will not be covered under warranty.
NOTICE: The high-pressure pump was filled with oil at the factory. Always check
oil level before using (refer to Maintenance for more information).
OPERATION
PRESSURE WASHER TERMINOLOGY
PSI: Pounds per Square Inch. The unit of measure for water pressure. Also used
for air pressure, hydraulic pressure, etc.
GPM: Gallons per Minute. The unit of measure for the flow rate of water.
CU: Cleaning Units. GPM multiplied by PSI equals CU.
Bypass Mode: Allows water to re-circulate within the pump when the gun trigger is
not pulled. This feature allows the operator to release the trigger gun and reposition
themselves without having to turn the engine off in between cleaning actions.
1.
Place the battery into the battery box. NOTE: Battery is not supplied, purchase
a 12V garden tractor battery with an ampere rating of at least 18AH.
2.
Make sure the battery boots are on the battery cables before connecting to battery.
a. Connect the positive (red) battery cable to the positive (+) battery terminal.
IMPORTANT: ALWAYS CONNECT THE POSITIVE (RED) CABLE BEFORE
CONNECTING THE NEGATIVE (BLACK) CABLE. NEVER CONNECT THE
NEGATIVE (BLACK) CABLE FIRST.
b. Connect the negative (black) battery cable to the negative (-) battery terminal.
c. Grease the battery terminals and cable ends.
Slide the batter boots over the battery terminals.
IF EQUIPPED WITH ELECTRIC START

10- ENG
WARNING: Do not allow the unit to run for more than two minutes without
the gun trigger being pulled. This could cause overheating and damage to
the pump. When the temperature inside the pump rises too high, the thermal
relief valve will open and release a spray of water from the pump to lower the
internal temperature. The valve will then close.
Thermal Relief Valve (P, Fig. 3): When the temperature inside the 3
P
pump rises too high, this valve will open and release a gush of
water in an effort to lower the temperature inside the pump. The
valve will then close.
Detergent Injection System: Mixes cleaners or cleaning solvents
with the water to improve cleaning effectiveness.
Water Supply: All pressure washers must have a source of water.
The minimum requirements for a water supply are 20 PSI and 5 Gallons Per Minute.
If your water source is a well, the garden hose length can only be 30ft. (9m) max.
WARNING: To reduce the possibility of contamination always protect
against backflow when connected to a potable water system.
PRESSURE WASHER OPERATING FEATURES
PRESSURE ADJUSTMENTS (FIG. 4)
The pressure setting is preset at the factory to achieve optimum pressure and
cleaning. If you need to lower the pressure, it can be accomplished by these meth-
ods.
1. Back away from the surface to be cleaned. The further away you are, the
less the pressure will be on the surface to be cleaned.
2. Change to the 40˚ nozzle (white). This nozzle delivers a less powerful stream
of water and a wider spray pattern. Refer to How To Use Spray Wand.
3. This pressure washer’s high pressure pump is equipped with an additional
feature that allows the pressure setting to be adjusted.
To lower the pressure, turn the pressure control knob on the pump counter-
clockwise to the desired pressure.
To return the pump pressure to the factory setting, turn the pressure control
knob on the pump clockwise until it stops.
-
+
4
NOTICE: DO NOT overtighten the pressure control knob, if overtightened the knob
COULD break and result in immediate loss of water pressure and costly repairs to
the unit.
HOW TO USE SPRAY WAND
The nozzles for the spray wand are stored in the nozzle holder on the panel assembly.
Colors on the panel identify nozzle location and spray pattern. Refer to the following
chart to choose the correct nozzle for the job to be performed.

11- ENG
CHANGING NOZZLES ON SPRAY WAND (FIG. 5)
DANGER: Risk of fluid injection. Do not direct discharge stream toward
persons, unprotected skin, eyes or any pets or animals. Serious injury will
occur.
WARNING: Flying objects could cause risk of serious injury. Do not
attempt to change nozzles while pressure washer is running. Turn engine off
before changing nozzles.
1. Pull quick-connect coupler (E) back and insert nozzle (K).
KE
5
2. Release quick-connect coupler and twist nozzle to
make sure it is secure in coupler.
WARNING: Flying object could cause risk of serious
injury. Ensure nozzle is completely inserted in quick-
connect socket and quick-connect collar is fully engaged
(forward) before squeezing gun trigger.
NOZZLE COLOR SPRAY PATTERN USES SURFACES*
Red
0˚ powerful pinpoint
for spot cleaning
of hard, unpainted
surfaces or for
high reach areas
unpainted metal
or concrete;
DO NOT use on wood
Yellow
15˚ intense cleaning
of unpainted
hard surfaces
grills, driveways, concrete
or brick walkways,
unpainted brick or stucco
Green
25˚ standard cleaning
nozzle for most
applications
yard tools, sidewalks,
lawn furniture, unpainted
siding, stucco, gutters
and eaves, concrete,
brick surfaces
White
40˚ cleaning of
painted or delicate
surfaces
auto/RV, marine, wood,
painted brick and stucco,
vinyl, painted siding
Black
low pressure applies cleaning
solutions
Low pressure
spray is safe on all
surfaces. Always verify
compatibility of cleaning
solution prior to use.
*NOTICE: The high pressure spray from your pressure washer is capable of
causing damage to surfaces such as wood, glass, automobile paint, auto striping
and trim, and delicate objects such as flowers and shrubs. Before spraying, check
the item to be cleaned to assure yourself that it is strong enough to resist damage
from the force of the spray.

12- ENG
HOW TO APPLY CHEMICALS/CLEANING SOLVENTS (FIG. 6)
Applying chemicals or cleaning solvents is a low pressure operation. NOTE: Use
only soaps and chemicals designed for pressure washer use. Do not use bleach.
To Apply Chemicals:
1. Ensure detergent siphon hose (F, Figure 6) is attached
F
6
to barbed fitting location near high pressure hose
connection of pump as shown.
2. Place other end of detergent siphon hose with
filter on it into container holding chemical/cleaning
solution. NOTE: For every 7 gallons of water pumped
1 gallon of chemical/cleaning solution will be used.
3. Install low pressure (black) nozzle into quick connect
fitting of spray wand, see How To Use Spray Wand paragraph in this section.
4. After use of chemicals, place detergent siphon hose into container of clean
water and draw clean water through chemical injection system to rinse system
thoroughly. If chemicals remain in the pump, it could be damaged. Pumps
damaged due to chemical residue will not be covered under warranty.
NOTE: Chemicals and soaps will not siphon if the black soap nozzle is not installed
on the spray wand.
STARTING (FIG. 7–10)
WARNING: To reduce the risk of injury, read the pressure washer instruction
manual and the engine instruction manual before starting pressure washer.
DANGER: Risk of fluid injection and laceration. When using the high
pressure setting, DO NOT allow the high pressure spray to come in contact
with unprotected skin, eyes, or with any pets or animals. Serious injury will
occur.
• Your washer operates at fluid pressures and velocities high enough to penetrate
human and animal flesh, which could result in amputation or other serious injury.
Leaks caused by loose fittings or worn or damaged hoses can result in injection
injuries. DO NOT TREAT FLUID INJECTION AS A SIMPLE CUT! See a physician
immediately!
DANGER: Carbon Monoxide. Using an engine indoors can kill you in
minutes. Engine exhaust contains high levels of carbon monoxide (CO), a
poisonous gas you cannot see or smell. You may be breathing CO even if you
do not smell engine exhaust.
• Breathing exhaust fumes will cause serious injury or death! Engine exhaust
contains carbon monoxide, an odorless and deadly gas.
• Operate pressure washer in a well-ventilated area. Avoid enclosed areas
such as garages, basements, etc.
• Never operate unit in or near a location occupied by humans or animals.
WARNING: Risk of Fire, Asphyxiation and Burn. Never fill fuel tank when
engine is running or hot. Do not smoke when filling fuel tank.
• Never fill fuel tank completely. Fill tank to 1/2" (12.7 mm) below bottom of filler
neck to provide space for fuel expansion. Wipe any fuel spillage from engine and
equipment before starting engine.
• DO NOT let hoses come in contact with very hot engine muffler during or
immediately after use of your pressure washer. Damage to hoses from contact with
hot engine surfaces will NOT be covered by warranty.

13- ENG
NOTICE: Risk of property damage. Never pull water supply hose to move pressure
washer. This could damage hose and/or pump inlet.
• DO NOT use hot water, use cold water only.
• Never turn water supply off while pressure washer engine is running or damage to
pump will result.
• DO NOT stop spraying water for more than two minutes at a time. Pump operates
in bypass mode when spray gun trigger is not pressed. If pump is left in bypass
mode for more than two minutes internal components of the pump can be
damaged.
If you do not understand these precautions, please contact our customer service
department at www.simpsoncleaning.com
Prior to starting, refer to your engine manual for proper starting procedure.
1. In a well ventilated outdoor area add fresh, high quality, unleaded gasoline
with a pump octane rating of 86 or higher. Do not overfill. Wipe up spilled
fuel before starting the engine. Refer to Engine Owner's Manual for correct
procedure.
IMPORTANT: Ethanol ShieldTM (sold separately) is a fuel stabilizer that helps
eliminate and prevent ethanol related problems in power equipment. Follow the
instructions on the container and add to the gasoline.
NOTICE: Use of fuels with greater than 10% ethanol are
not approved for use in this product per EPA regulations
and will damage the unit and void the warranty.
2. Check engine oil level. Refer to Engine Owner's Manual for correct procedure.
3. Check pump oil level. The oil level should come to the dot in the middle of the
sight glass. Refer to the Pump paragraph under Maintenance.
4. Connect the water hose to the water source. Turn the water source on to
remove all air from the hose. When a steady stream of water is present, turn
the water source off.
5. Verify the filter screen (M) is in water inlet of pump. NOTE: Convex side
facesout.
6. Connect water source (N) to pump inlet (J). NOTE: Water source must provide
a minimum of 5 gallons per minute at 20 PSI.
7. Connect
high pressure hose (C) to pump outlet (I).
I
9
C
8
N
J
M
7
WARNING: To reduce the possibility of contamination always protect
against backflow when connected to a potable water system.
8. Choose the correct nozzle for the job to be performed. See How To Use spray
Wand instructions in this section. NOTE: If applying a chemical or cleaning
solution, see How To Apply Chemicals/Cleaning Solvents instructions in
thissection.

14- ENG
9. Turn water source on.
NOTICE: Risk of property damage. Failure to do so could cause damage to the
pump.
10. Remove all air from the pump and high pressure hose by depressing trigger
until a steady stream of water is present.
11. Start engine. See Engine Owner's Manual for correct procedure.
WARNING: Risk of unsafe operation. If engine does not start after two
pulls, squeeze trigger of gun to relieve pump pressure. Pull starter cord slowly
until resistance is felt. Then pull cord rapidly to avoid kickback and prevent
hand or arm injury.
NOTE: If the oil level in the engine is low, the engine will not start. If the engine does
not start, check the oil level and add oil as needed.
12. Depress trigger on gun to start water flow.
WARNING: Do not allow the unit to run for more than two minutes without
the gun trigger being pulled. This could cause overheating and damage to
the pump. When the temperature inside the pump rises too high, the thermal
relief valve will open and release a spray of water from the pump to lower the
internal temperature. The valve will then close.
WARNING: Risk of unsafe operation. Stand on a stable surface and
grip gun/spray wand firmly with both hands. Expect the gun to kick when
triggered.
13. Release trigger to stop water flow.
WARNING: Risk of injury from spray. Always engage 10
O
the trigger lock (O) when gun is not in use. Failure to do
so could cause accidental spraying.
SHUTTING DOWN
1. After each use, if you have applied chemicals, place
detergent siphon hose into container of clean water and
draw clean water through chemical injection system to rinse systemthoroughly.
NOTICE: Risk of property damage. Failure to do so could cause damage to the
pump.
2. Turn engine off. See Engine Owner's Manual.
NOTICE: Risk of property damage. NEVER turn the water off with the engine
running.
3. Turn water source off.
4. Pull trigger on spray gun to relieve any water pressure in hose or spray gun.
NOTE: Failure to release system pressure will prevent removal of high pressure
hose from spray gun or pump connection.
5. See Storage section in this manual for proper storage procedures.

15- ENG
MAINTENANCE
WARNING: Risk of burn hazard. When performing maintenance, you may
be exposed to hot surfaces, water pressure or moving parts that can cause
serious injury or death.
WARNING: Risk of fire hazard. Always disconnect, spark plug wire,
let the engine cool and release all water pressure before performing any
maintenance or repair. The engine contains flammable fuel. Do not smoke or
work near open flames while performing maintenance.
To ensure efficient operation and longer life of your pressure washer, a routine
maintenance schedule should be prepared and followed. If the pressure washer is
used in unusual conditions, such as high-temperatures or dusty conditions, more
frequent maintenance checks will be required.
ENGINE
Consult the Engine Owner's Manual for the manufacturer's recommendations
for any and all maintenance. NOTE: The engine drain plug is located at the rear of
the unit.
PUMP (FIG. 11)
NOTE: The Pump was filled with oil at the factory. The preferred oil is SIMPSON®
Premium Pump Crankcase Oil. If this oil is not available, an SAE 15W-40 oil may
be used. Change the pump oil after the first 50hours of operation and every 100
hours thereafter, or every 3months.
TO CHECK OIL
The oil level should come to the dot in the middle of 11 BB
AA
CC
the sight glass (AA).
HOW TO CHANGE PUMP OIL
1. Loosen pump oil fill plug (BB).
2. Place a container under the pump oil drain
plug (CC).
3. Remove pump oil drain plug.
4. After oil is drained, replace pump oil drain plug. Tighten securely.
5. Refill pump using SIMPSON®Premium Pump Crankcase Oil. If this oil is not
available, an SAE 15W-40 oil may be used.
6. Replace pump oil fill plug and tighten securely.
If there is a problem with the pump contact us at www.simpsoncleaning.com
CONNECTIONS
Connections on pressure washer hoses, gun and spray wand should be cleaned
regularly and lubricated with light oil or lithium grease to prevent leakage and
damage to the o-rings.
NOZZLE CLEANING (FIG. 12)
If the nozzle becomes clogged with foreign materials, such as dirt, excessive
pressure may develop. If the nozzle becomes partially clogged or restricted, the
pump pressure will pulsate. Clean the nozzle immediately using the nozzle kit
supplied and the following instructions:
1. Shut off the pressure washer and turn off the water supply.

16- ENG
2. Pull trigger on gun handle to relieve any water pressure.
3. Disconnect the spray wand from the gun.
4. Remove the high pressure nozzle (K) from the spray wand. 12 K
K
N
Remove any obstructions with the nozzle cleaning tool
provided and backflush with clean water.
5. Direct water supply (N) into nozzle to backflush loosened
particles for 30 seconds.
6. Reassemble the nozzle to the wand.
7. Reconnect spray wand to gun and turn on water supply.
8. Start pressure washer and place spray wand into high
pressure setting to test.
CLEAN THE WATER INLET FILTER (FIG. 7)
This screen filter should be checked periodically and cleaned if necessary.
1. Remove filter by grasping end and removing it from water inlet of pump.
2. Clean filter by flushing it with water on both sides.
3. Re-insert filter into water inlet of pump. NOTE: Convex side faces out.
NOTE: Do not operate the pressure washer without filter properly installed.
STORAGE
ENGINE
Consult the Engine Owner's Manual for manufacturer’s recommendations for
storage.
TO PREVENT FUEL-RELATED PROBLEMS
1. Add Ethanol ShieldTM fuel stabilizer following the manufacturer’s instructions.
When adding a gasoline stabilizer, fill the fuel tank with fresh gasoline. If only
partially filled, air in the tank will promote fuel deterioration during storage.
If you keep a container of gasoline for refueling, be sure that it contains only
fresh gasoline.
2. After adding a gasoline stabilizer, run the engine outdoors for 10 minutes
to be sure that treated gasoline has replaced the untreated gasoline in the
carburetor.
3. Turn the fuel valve to the OFF position.
4. Continue to run the engine until it stops from the lack of fuel in the carburetor
fuel bowl. Running time should be less than 3 minutes.
PUMP
The manufacturer recommends using SIMPSON®/ POWERWASHER®Pump
Guard or equivalent when storing the unit for more than 30 days and/or when
freezing temperatures are expected. SIMPSON®/ POWERWASHER® Pump Guard
is environmentally friendly.
NOTE: Using pump guard helps provide proper lubrication to the internal seals of
the pump regardless of temperature or environment.
NOTICE: Risk of property damage. Use only SIMPSON®/ POWERWASHER®
Pump Guard or equivalent. Other products could be corrosive and/or contain alco-
hol which may cause pump damage.
1. Turn off pressure washer and disconnect hoses from pump.

17- ENG
2. Unscrew bottle valve from Pump Guard bottle and remove seal.
3. Screw bottle valve back onto bottle.
4. Attach bottle to water inlet of pump.
5. Squeeze bottle to inject contents into pump.
6. With ignition switch off, simultaneously pull starter rope and squeeze bottle.
Repeat until protector fluid exits pump outlet. NOTE: This step may require
two people.
ACCESSORIES
DANGER: Risk of fluid injection. When using replacement spray wands or
guns with this pressure washer, DO NOT use a spray wand and/or spray gun/
wand combination that is shorter in length than what was provided with this
pressure washer as measured from the nozzle end of the wand to the gun
trigger.
NOTICE: The use of any other accessory not recommended for use with this tool
could be hazardous. Use only accessories rated equal to or greater than the rating
of the pressure washer.
SPECIFICATIONS
* Rated Pressure and Rated Water Flow is within manufacturing tolerance of
(+/- 10%).
In a continued commitment to improve quality, the manufacturer reserves the right
to make component changes, design changes, or specification changes when
necessary and without notice.
SERVICE INFORMATION
Do not return this product to your retailer. Please contact our customer service
department at www.simpsoncleaning.com
LIMITED WARRANTY
The manufacturer of this product agrees to repair or replace designated parts that
prove defective within the warranty period listed below at the manufacturer’s sole
discretion. Specific limitations/extensions and exclusions apply.
This warranty covers defects in material and workmanship and not parts failure
due to normal wear, depreciation, abuse, accidental damage, negligence, improper
use, maintenance, water quality or storage. To make a claim under the terms of
the warranty, all parts said to be defective must be retained and available for return
upon request to a designated Warranty Service Center for warranty inspection. The
judgments and decisions of the manufacturer concerning the validity of warranty
claims are final.

18- ENG
These warranties pass through to the end user and are non-transferable. As a
factory authorized and trained Warranty Service Center, the factory will honor the
terms of all component warranties and satisfy claims of the appropriate warranty
provisions.
Normal wear items include, but are not limited to, valves and seals, which are not
covered by this warranty.
This warranty replaces all other warranties, express or implied, including without
limitation any warranties of merchantability or fitness for a particular purpose and
all such warranties are hereby disclaimed and excluded by the manufacturer. The
manufacturer’s warranty obligation is limited to repair and replacement of defec-
tive products as provided herein and the manufacturer shall not be liable for any
further loss, damages, or expenses – including damages from shipping, accident,
abuse, acts of God, misuse, or neglect. Neither is damage from repairs using parts
not purchased from the manufacturer or alterations performed by non-factory
authorized personnel. Failure to install and operate equipment according to the
guidelines put forth in the instruction manual shall void warranty.
This warranty does not cover the following: machines used for rental purposes,
damage resulting from shipping (claims must be filed with freighter), accident,
abuse, act of God, misuse, or neglect. Neither is damage from repairs or altera-
tions performed by non-factory authorized personnel or failure to install and oper-
ate equipment according to the guidelines put forth in the instruction manual.
The manufacturer will not be liable to any persons for consequential damage, for
personal injury, or for commercial loss.
WARRANTY DOES NOT APPLY TO FAILURES DUE TO:
• Freight damage
• Damage due to chemical deterioration, scale build up, rust, corrosion or
thermal expansion
• Freeze damage
• Damage caused by parts or accessories not obtained from an authorized
dealer or not approved by the manufacturer.
• Normal wear of moving parts or components affected by moving parts.
ENGINE
Covered by engine manufacturer warranty. See engine manual.
HIGH PRESSURE PUMP (DEFECTS IN MATERIAL AND WORKMANSHIP)
Covered by pump manufacturer warranty.
FRAME (DEFECTS IN MATERIAL AND WORKMANSHIP)
Ten (10) yearsfrom date of purchase.
ACCESSORIES (DEFECTS IN MATERIAL AND WORKMANSHIP)
Includes nozzles, hoses, spray guns, wands, tires, feet
Ninety (90) days from date of purchase.

19- ENG
TROUBLE SHOOTING GUIDE
OPERATIONAL
ISSUE
POSSIBLE CAUSE SOLUTION
Engine will not
start (see Engine
Owner's Manual
for further engine
troubleshooting)
No fuel Add fresh fuel
Pressure builds up
after two pulls on
the recoil starter
or after initial use
Squeeze gun trigger to relieve
pressure
Choke lever in the
"No Choke" position
Move choke to the "Choke"
position
Spark plug wire
not attached
Attach spark plug wire
No or low
pressure
(initial use)
Spray wand not
in high pressure
See How to Use Spray Wand
instructions in the Operation Section
Low water supply Water supply must be at
least 5 gpm @ 20 PSI
Leak at high pressure
hose fitting
Repair leak. Apply sealant
tape if necessary
Nozzle obstructed See Nozzle Cleaning instructions
in the Maintenance section
Water filter screen
clogged
Remove and clean filter. See
Cleaning Water Inlet Filter
paragraph in the Maintenance
section for the correct procedure
Air in hose Turn off the engine, then the water
source. Disconnect the water source
from the pump inlet and turn the
water source on to remove all air
from the hose. When there is a
steady stream of water present,
turn water source off. Re-con-
nect water source to pump inlet
and turn on water source. Squeeze
trigger to remove remaining air
Choke in the
“Choke” position
Move choke to the “No Choke”
position
High pressure
hose is too long
Use high pressure hose under
100 feet (30m)
Will not draw
chemicals
Spray wand not
in low pressure
See How to Use Spray Wand
paragraph in the Operation Section
Chemical filter
clogged
Clean filter
Chemical screen not
in cleaning solution
Make sure end of detergent
siphon hose is fully submerged
into cleaning solution
Chemical too thick Dilute chemical. Chemical should
be the same consistency as water
Pressure hose
is too long
Lengthen water supply hose
instead of high pressure hose

OPERATIONAL
ISSUE
POSSIBLE CAUSE SOLUTION
Will not draw
chemicals
Chemical build up
in chemical injector
Please contact our customer service
department at
www.simpsoncleaning.com
No or low
pressure
(after period of
normal use)
Worn seal or packing Please contact our customer service
department at
www.simpsoncleaning.com
Worn or obstructed
valves
Please contact our customer service
department at
www.simpsoncleaning.com
Worn unloader piston Please contact our customer service
department at
www.simpsoncleaning.com
Broken belts Replace belts. Please contact our
customer service department at
www.simpsoncleaning.com
Water leaking at
gun/spray wand
connection
Worn or torn o-ring Check and replace
Loose hose
connection
Tighten
Water leaking
at pump
Loose connections Tighten
Piston packings worn Please contact our customer service
department at
www.simpsoncleaning.com
Worn or torn o-ring Please contact our customer service
department at
www.simpsoncleaning.com
Pump head or
tubes damaged
from freezing
Please contact our customer service
department at
www.simpsoncleaning.com
Pump pulsates Nozzle obstructed See Nozzle Cleaning paragraph
in the Maintenance section
for the correct procedure
Oil leaking
at pump
Oil seals worn Please contact our customer service
department at
www.simpsoncleaning.com
Loose drain plug Tighten
Worn drain plug
o-ring
Check and replace
Worn fill plug o-ring Check and replace
Pump overfilled Check for correct amount
Incorrect oil used Drain and fill with correct
amount and type of oil
Vent plug is clogged Clean vent plug; blow air through
it to remove any blockage. If prob-
lem persists, replace plug
Air filter filled with oil Clean and/or replace filter
element. Refer to Engine Owner's
Manual for correct procedure.