Power Fist 8643926 User manual

V 4.0 8643926
Please read and understand all instructions before use. Retain this manual for
future reference.
4.2GPM@4,000PSI
GasPressureWasher
User Manual

8643926 4.2 GPM @ 4,000 PSI Gas Pressure Washer V 4.0
2 For technical questions call 1-800-665-8685
SPECIFICATIONS
Type
Gas Pressure Washer
Max. Pressure
4,000 PSI
Max. Flow
4.2 GPM
Engine Type
Ducar
Engine Displacement
420cc
Fuel Type
Gasoline
Pump Type
Brass Head Triplex Piston Pump
Pump Oil Capacity
500 ml
Max. Inlet Water Temperature
60°C (140°F)
Adjustable Pressure
Yes
Chemical Injector Type
Downstream Fixed
Thermal Relief Valve
Yes
Gun and Wand
Yes
Nozzle Type
Quick Coupler
Nozzle Sizes
Soap, 0°, 15°, 25°, 40°
Hose
30 ft of 5/16 in. Steel Braided Rubber Hose
Hose Reel
No
Cart Frame
Powder Coated Steel
Wheel Size
13 in.
Wheel Type
Pneumatic
Battery Required
Yes
DANGER! You must read all safety instructions in this manual and the included
Engine manual before attempting to use the pressure washer. Intentional or
accidental misuse of the pressure washer can result in fatal or serious injuries
such as amputation.
4.2GPM@4,000PSI
GasPressureWasher

V 4.0 4.2 GPM @ 4,000 PSI Gas Pressure Washer 8643926
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INTRODUCTION
The gas pressure washer features a 420cc gas engine, triplex piston pump with
thermal relief and an adjustable pressure regulator. The frame is powder coated
steel to prevent rust and corrosion and has a fold down handle for easy storage. It
includes five quick connect pressure nozzles and 30 ft. of steel braided rubber hose.
A chemical injector feeds soaps and chemicals into the water stream.
This pressure washer is great for industrial cleaning, paint preparation, washing
trucks and heavy equipment.
A separate manual for the gasoline engine is included. Please read the Engine
manual before using this product. The Engine manual is considered accurate when
information about the engine disagrees with this manual.
SAFETY
WARNING! Read and understand all instructions before using this tool. The
operator must follow basic precautions to reduce the risk of personal injury
and/or damage to the equipment.
Keep this manual for safety warnings, precautions, operating or inspection and
maintenance instructions.
HAZARD DEFINITIONS
Please familiarize yourself with the hazard notices found in this manual. A notice is
an alert that there is a possibility of property damage, injury or death if certain
instructions are not followed.
DANGER! This notice indicates an immediate and specific hazard that will
result in severe personal injury or death if the proper precautions
are not taken.
WARNING! This notice indicates a specific hazard or unsafe practice that could
result in severe personal injury or death if the proper precautions
are not taken.
CAUTION! This notice indicates a potentially hazardous situation that may result
in minor or moderate injury if proper practices are not taken.

8643926 4.2 GPM @ 4,000 PSI Gas Pressure Washer V 4.0
4 For technical questions call 1-800-665-8685
NOTICE! This notice indicates that a specific hazard or unsafe practice will
result in equipment or property damage, but not personal injury.
WORK AREA
1. Operate in a safe work environment. Keep your work area clean, well lit and
free of distractions.
2. Keep anyone not wearing the appropriate safety equipment away from the
work area.
3. Store unused tools properly in a safe and dry location to prevent rust or
damage. Lock tools away and keep out of the reach of children.
4. DO NOT install or use in the presence of flammable gases, dust or liquids.
PERSONAL SAFETY
WARNING! Wear personal protective equipment approved by the Canadian
Standards Association (CSA) or American National Standards Institute (ANSI).
PERSONAL PROTECTIVE EQUIPMENT
1. Always wear impact safety goggles that provide front and side protection for
the eyes. Eye protection equipment should comply with CSA Z94.3-07 or ANSI
Z87.1 standards based on the type of work performed.
2. Wear gloves that provide protection based on the work materials or to reduce
the effects of tool vibration.
3. Wear protective clothing designed for the work environment and tool.
4. Non-skid footwear is recommended to maintain footing and balance in the
work environment.
PERSONAL PRECAUTIONS
Control the tool, personal movement and the work environment to avoid personal
injury or damage to tool.
1. DO NOT operate any tool when tired or under the influence of drugs,
alcohol or medications.
2. Avoid wearing clothes or jewelry that can become entangled with the moving
parts of a tool. Keep long hair covered or bound.

V 4.0 4.2 GPM @ 4,000 PSI Gas Pressure Washer 8643926
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3. DO NOT overreach when operating a tool. Proper footing and balance enables
better control in unexpected situations.
4. Securely hold this tool using both hands. Using a tool with only one hand can
result in loss of control.
SPECIFIC SAFETY PRECAUTIONS
WARNING! DO NOT let comfort or familiarity with product (gained from repeated
use) replace strict adherence to the tool safety rules. If you use this tool
unsafely or incorrectly, you can suffer serious personal injury.
WARNING! NEVER place your hands in front of a nozzle. NEVER grasp the hose
and fittings or replace the nozzle while the pressure washer is in operation.
NEVER attempt to attach or remove the spray wand or hose fittings while
pressure washer system is pressurized.
1. Use the correct tool for the job. This tool was designed for a specific function.
DO NOT modify or alter this tool or use it for an unintended purpose.
2. NEVER defeat the safety features of this product.
3. Keep pressure washer a minimum of four feet away from anything that could
be damaged by heat from the muffler exhaust such as houses, automobiles,
dry brush or live plants.
4. DO NOT leave the spray gun unattended while the unit is running.
5. Using a pressure washer can create puddles and slippery surfaces. The work
area should have adequate slopes and drainage to reduce the possibility of
falling due to slips.
6. Always operate the pressure washer from a stable surface. Avoid using the
pressure washer from precarious locations such as ladders or scaffolding.
7. DO NOT attempt to repair damaged or defective high-pressure hoses. Always
replace them.
8. DO NOT repair leaking connections with sealant of any kind. Replace the O-
ring or seal.
9. DO NOT disconnect the high-pressure hose from the pump and spray gun
while the system is pressurized.

8643926 4.2 GPM @ 4,000 PSI Gas Pressure Washer V 4.0
6 For technical questions call 1-800-665-8685
10. Always ensure that the spray gun, nozzles, hoses and fittings are correctly
attached before starting the engine.
11. NEVER hold onto the hose or fittings during operation. This can allow
pressurized water to escape and inflict an injury.
12. DO NOT plug this pressure water into a hot water supply. This pressure
washer is designed for cold water use only.
13. Prior to starting the pressure washer in cold weather, be sure ice has not
formed in any part of the equipment.
14. Ensure the pressure washer is not covered during operation to avoid
overheating the motor.
15. This pressure washer is capable of producing pressures up to 4,000 PSI. To
avoid property damage and personal injury, do not operate the pump with
components rated for less than 4,000 PSI working pressure.
16. If connecting the pressure washer to a portable water system, ensure the
water system is protected against backflow.
17. NEVER attach or remove wand or hose fittings while system is pressurized.
18. Use only hose and high pressure accessories rated for pressure higher than
your pressure washer's PSI.
19. Relieve the pump pressure if the engine fails to start. Point the spray gun in a
safe direction and squeeze the trigger.
SPRAYING PRECAUTIONS
DANGER! The pressure washer produces fluid pressures and velocities strong
enough to penetrate human and animal flesh that will result in serious injury or
amputation with some nozzles.
NEVER aim the pressure washer spray gun in the direction of people or animals,
even if the power and water supply are turned off. High velocity fluid spray can
cause objects to break, propelling particles at high speeds.
1. Keep operating area clear of all persons, animals and obstacles.
2. High pressure sprays can cause serious bodily injury. DO NOT aim the spray
gun at people, animals or plants.
3. DO NOT spray flammable or toxic liquids.

V 4.0 4.2 GPM @ 4,000 PSI Gas Pressure Washer 8643926
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4. DO NOT spray near a power source.
5. DO NOT lock the spray gun in open position.
6. Only use a spray gun that has a trigger lock or trigger guard in place and in
working order.
7. Be careful when squeezing the trigger, as recoil from the spray gun can cause
the operator to fall.
8. NEVER place hands in front of nozzle.
9. Always be certain spray gun, nozzles and accessories are correctly attached.
10. To relieve system pressure, shut off the engine, turn off the water supply, and
pull the spray gun trigger until water stops flowing.
11. Always aim the spray gun in safe direction and squeeze trigger to release high
pressure when you stop the engine.
12. Keep high pressure hose connected to pump and spray gun while system
is pressurized.
13. NEVER use a spray gun which does not have a trigger lock or trigger guard in
place and in working order.
14. NEVER connect high pressure hose to spray gun wand.
RISK OF CHEMICAL BURN
DANGER! 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.
1. DO NOT use acids, gasoline, kerosene, or any other flammable materials in
this product. Use only household detergents, cleaners and degreasers
recommended for use in pressure washers.
2. Wear protective clothing to protect eyes and skin from contact with
sprayed materials.
3. DO NOT use chlorine bleach or any other corrosive compound.

8643926 4.2 GPM @ 4,000 PSI Gas Pressure Washer V 4.0
8 For technical questions call 1-800-665-8685
UNPACKING
WARNING! DO NOT operate the tool if any part is missing. Replace the missing
part before operating. Failure to do so could result in a malfunction and
personal injury.
Remove the parts and accessories from the packaging and inspect for damage.
Make sure that all items in the parts list are included.
Contents:
• Gas Pressure Washer
• 5 Quick Connect Spray Nozzles (Soap, 0°, 15°, 25°, 40°)
• 30 ft of Steel Braided Rubber Hose
• Rear Entry Spray Gun with 20 in. Wand
• Siphon Hose with Filter
• Engine Manual
IDENTIFICATION KEY
A Pressure Adjusting Knob – Increase pressure by turning the knob to the right
(+). Reduce pressure by turning the knob to the left (-).
B Detergent Injector – Use to siphon detergent or other chemicals into the low
pressure water stream.
Fig. 1

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C Water Outlet – To connect high pressure hose.
D Water Inlet with Filter Screen – Connect garden hose here. A filter
screen must be in place at the end of the hose to prevent debris from
entering the pump.
E Red Shipping Plug Attached with Vent Plug – The pump is shipped with a red
shipping plug to prevent oil leaking during transportation. Replace with the
attached vent plug before using.
F Pump Head Build with Thermal Relief System – Cycles water through the
pump when the water reaches 125° to 155° F. Warm water will discharge from
pump onto ground. This system prevents internal pump damage.
G Folding Handle Push Bar – Push bar down to release handle. Fold handle
for storage.
H Air Filter – Protects engine by filtering dust and debris out of intake air.
I Fuel Tank – Fill tank with regular unleaded fuel.
J Choke Lever – Prepares a cold engine for starting.
K Fuel Valve – ON/OFF lever to control fuel flow to the engine.
L Throttle Lever – Sets engine in starting mode for recoil starter.
M Recoil Starter – Use for starting the engine manually.
N Spray Nozzles – 0°/15°/25°/40° and soap nozzle for various high pressure
cleaning applications.
O Spray Gun – Controls the application of water onto cleaning surface with
trigger device. Includes trigger lock.
P High Pressure Hose – Connect one end to the water pump and the other end
to the spray gun.
Q Spray Gun Wand with Quick Connect – Attach spray nozzle to wand, based on
the cleaning requirement.
R Ignition Switch – Turn switch to the ON position to start the engine. Set switch
to OFF to stop engine. Consult the Engine Manual for full instructions.
S Oil Fill Cap – Fill engine with oil here.
Bypass Mode: In bypass mode, the high pressure pump recirculates water when
the spray gun is not in use.

8643926 4.2 GPM @ 4,000 PSI Gas Pressure Washer V 4.0
10 For technical questions call 1-800-665-8685
ASSEMBLY & INSTALLATION
When this manual refers to a part number, it refers to the included Parts List. A
part letter refers to the included Parts Identification section.
Your pressure washer requires some assembly. Three open-end wrenches are
needed: 10 mm, 14 mm and 17 mm. The pressure washer will also require both oil
and fuel before it is ready for use.
UNPACK THE PRESSURE WASHER
1. Set carton on a rigid, flat surface. Remove all loose parts and packing. Leave
the pressure washer in the carton.
2. Cut the carton’s four corners and open it so all four sides lay flat. Leave the
pressure washer on the carton while installing the wheels and rubber bumpers
on the legs.
ASSEMBLE THE WHEEL
1. Fit the axles into the axle ports as shown,
secure with the nut, spring washer and
washer (Fig. 2)
2. Fit the wheels to the axles and secure with
the nut and washer (Fig. 3). DO NOT over
tighten the nuts, the wheels must be able to
rotate freely.
ASSEMBLE THE RUBBER FEET.
Fit the rubber feet to the legs as shown (Fig. 4).
ASSEMBLE THE SPRAY GUN/HOSE HOOK
Fit the hook into the position shown and secure using the washers and nuts on the
bracket (Fig. 5).
Fig. 2
Fig. 3

V 4.0 4.2 GPM @ 4,000 PSI Gas Pressure Washer 8643926
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PREPARING PRESSURE PUMP
The pressure pump has a shipping plug inserted
into the opening for the pump breather plug.
1. Using a 17 mm open-end wrench or socket
wrench, remove shipping plug from the
pressure pump. Discard shipping plug (Fig. 6).
2. Remove pump breather plug from parts bag
and insert it into pressure pump.
3. Tighten pump breather plug securely by hand.
DO NOT use open end wrench or socket
wrench to tighten. Using a wrench to tighten
pump breather plug could strip threads.
4. Use sight glass on end of pressure pump to
ensure pump oil is at 1/2 of the sight glass
level (Fig. 7).
5. Add oil to pressure pump if level is below
indicator on oil gauge. Use 30-weight non-
detergent oil.
BEFORE THE FIRST USE
The engine will require both oil and fuel before
using the pressure washer for the first time.
Consult the included Engine Manual’s Care &
Maintenance section for instructions on how to
add oil and fuel to the engine.
NOTICE! DO NOT attempt to crank or start the engine before it has been properly
serviced with the recommended oil. This may result in an engine failure.
ATTACHING HIGH PRESSURE HOSE TO SPRAY GUN
1. Connect the high pressure hose to the spray gun (Fig. 8).
a. Pull back the quick connect collar at the end of the high pressure hose.
b. Insert the male quick connect fitting on the spray gun into female quick-
disconnect fitting.
Fig. 4
Fig. 5
Fig. 6
Fig. 7

8643926 4.2 GPM @ 4,000 PSI Gas Pressure Washer V 4.0
12 For technical questions call 1-800-665-8685
c. Release the collar and it will snap forward.
Listen for click to ensure both quick-
disconnects are coupled.
2. Pull the high pressure hose and the spray gun
in opposite directions to ensure they do not
separate.
3. Connect the spray wand to the spray gun by
threading it into place. Secure hand tight
(Fig. 9).
4. Connect the water source.
a. Connect the hose and water supply to
the pump.
b. Attach the other end of high pressure
hose to the high pressure outlet on the
pump. Pull down the quick connect
collar, slide onto the pump outlet and
release the collar (Fig 10 – 1). Pull on
hose to ensure a tight connection.
c. Before connecting a garden hose to
pump inlet, inspect the inlet screen
(Fig. 11-1). Clean the screen if it contains
debris or replace it if damaged. DO NOT
run pressure washer if inlet screen is
damaged.
d. Run water through your garden hose for
30 seconds to clean out any debris.
IMPORTANT! DO NOT siphon standing water
for the water supply. Use only clean, cold
water (less than 100°F).
d. Connect the garden hose (not to exceed 50 feet in length and with the
ID no less than 13 mm) to the water inlet (Fig. 11-2). Tighten by hand.
Fig. 8
Fig. 9
Fig. 10
10-1
11-2
11-1
Fig. 11

V 4.0 4.2 GPM @ 4,000 PSI Gas Pressure Washer 8643926
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e. Turn the water on, release the trigger lock,
then squeeze the trigger to purge the pump
system of air and impurities (Fig. 12).
5. There MUST be at least 10 ft (3 m) of
unrestricted garden hose between the pressure
washer inlet and any device, such as a vacuum
breaker or check valve.
PRESSURE WASHER LOCATION
CLEARANCES AND AIR MOVEMENT
WARNING! Exhaust heat and gases can ignite combustibles, structures or
damage the fuel tank, causing a fire. Keep at least 4 ft (1.2 m) clearance on all
sides of pressure washer including overhead.
IMPORTANT! Consult the Safety Precautions in the included Engine manual.
1. Only operate the pressure washer outdoors.
2. Place the pressure washer in a
well ventilated area that will
remove exhaust gas
(Fig. 13-1) and prevent it from
accumulating into the area.
3. Ensure the exhaust gas does
not enter a confined area
through windows, doors,
ventilation intakes or other openings.
4. Take prevailing winds and air currents into account.
OPERATION
HOW TO START YOUR PRESSURE WASHER
WARNING! Risk of eye injury. Spray can splash back or propel objects. Always
wear safety goggles when using this equipment or in the vicinity where this
equipment is in use.
Fig. 12
Fig. 13
13-1

8643926 4.2 GPM @ 4,000 PSI Gas Pressure Washer V 4.0
14 For technical questions call 1-800-665-8685
IMPORTANT! The red trigger lock must be in place to prevent accidental
activation of the water pressure gun. Flip the red lever on the trigger up so it
rests in the depression in the handle. Aim the spray gun in a safe direction and
test the trigger to ensure the lock is working.
To start your pressure washer for the first time, follow these instructions step-by-
step. This starting information also applies if you have let the pressure washer sit
idle for at least a day.
1. Place pressure washer near an outside water source capable of supplying
water at a flow rate greater than 4.2 gallons per minute (15,90 litres per
minute) and no less than 20 PSI at the pressure water pump inlet.
a. Place the water hose in a pail (1 gallon or 3.78 litres) and time how long
it takes to fill. The pail must be filled in 15 seconds or less to supply the
minimum water to the pump on this pressure washer.
2. Check that high pressure hose is tightly connected to the spray gun and
the pump.
3. Make sure unit is in a level position.
4. Uncoil high pressure hose completely before using the pressure washer.
5. Connect the garden hose to pump’s water inlet.
6. Remove the spray gun by rotating the handle 90° to the left or right and sliding
it sideways out of the gun/hose hook.
7. Engage the spray gun trigger lock if not already set.
a. Press a thumb against the back of the trigger to prevent it from moving.
b. Pull the red trigger lock lever upwards.
c. Release the thumb pressure and guide
the trigger lock into the handle
depression. Aim spray gun in a safe
direction and pull trigger to test if the
lock is working.
Fig. 14

V 4.0 4.2 GPM @ 4,000 PSI Gas Pressure Washer 8643926
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NOTICE! DO NOT run the pump without the water supply connected and turned
on. This may damage the pump mechanism beyond repair.
8. Insert the nozzle into the end of the wand. See Pressure Nozzle Selection for
full instructions on choosing and connecting a nozzle.
9. Start the engine per Operations instruction in the Engine manual.
a. The engine may fail to run. Before the next attempt to start the engine,
aim the spray gun in a safe direction and squeeze the trigger to release
built up pressure.
10. Turn the water on and flip the trigger lock down. Aim the spray gun in a safe
direction and squeeze trigger to purge pump system of air and impurities.
HOW TO STOP YOUR PRESSURE WASHER
IMPORTANT! Spray gun traps high water pressure, even when engine is stopped
and water is disconnected.
1. Release spray gun trigger and let engine idle for two minutes.
2. Move the throttle lever on engine to the MIN. position, the engine switch to the
OFF position and the fuel valve to the OFF position. Consult the Engine manual
for complete instructions.
a. Turn the engine switch to the OFF position to stop the engine in
an emergency.
3. Aim the spray gun in a safe direction and squeeze spray gun trigger to release
retained high water pressure.
4. Set the trigger lock.
PRESSURE NOZZLE SET UP
1. Pull the spray wand’s quick coupler collar back.
a. The quick coupler collar is automatically retracted without a pressure
nozzle inserted in the wand.

8643926 4.2 GPM @ 4,000 PSI Gas Pressure Washer V 4.0
16 For technical questions call 1-800-665-8685
2. Place one of the five male quick-disconnect
pressure nozzles into female the quick coupler.
3. Check the position of the pressure nozzle’s
opening. This will determine the spray angle
when the spray gun is held in a level position.
4. Press down on the nozzle. The collar will snap forward with a loud click. The
nozzle is locked in place.
5. Pull the high pressure nozzle and spray wand in opposite directions to
ensure they do not separate.
6. Turn off pressure washer and release pressure in the system before
attempting to change pressure nozzles.
PRESSURE NOZZLE SELECTION
The pressure washer has five spray nozzles. Each nozzle is color coded and delivers
a specific spray arc between 0° and 65°. The narrower the degree arc, the higher
the pressure at the water spray’s point of contact with the item being cleaned.
Distance from the item that is being sprayed will also factor into the pressure level
at the point of contact.
The table identifies the colour, arc and an example. The purpose example is only a
suggestion as some items are made of multiple materials and not all materials will
withstand the force of the pressurized spray. Choose the nozzle with the largest
spray arc, if you are unsure how much pressure to apply to an item without
damaging it. Switch to a nozzle with a narrower degree angle until you find the one
that achieves the results you want.
The nozzles are stored on the panel mounted on the pressure washer’s handle.
Colors on the panel identify the correct nozzle location.
Fig. 15

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SPRAYING
1. Ensure there are no bystanders, animals or plants that could be injured or
damaged by the direct or deflected spray. Also check that there are no objects
that may be damaged.
2. Follow the instructions to start the engine.
3. Free the trigger lock and press into place on the trigger.
4. Release pressure from the pressure washer’s system.
5. Use low pressure to wash items such as a car or boat. Use higher pressure to
strip paint and degrease driveways.
Colour
Arc
Purpose Example
Red
0°
Narrow stream to clean and
remove embedded grit or grime
from concrete or brick surfaces.
Yellow
15°
Heavy duty cleaning of
concrete surfaces or without
use of chemicals.
Green
25°
Clean wood surfaces compacted
dirt, paint, oil or mildew.
White
40°
Clean delicate surfaces like
stucco or siding. Also patio
furniture or home siding.
Black
65°
(Soap)
Wet surfaces or apply
chemicals/detergents. Does
not provide enough force to
clean by itself.

8643926 4.2 GPM @ 4,000 PSI Gas Pressure Washer V 4.0
18 For technical questions call 1-800-665-8685
a. Increase the spray pressure by turning the
pressure control knob (N) clockwise (+).
Decrease spray pressure by turning the
pressure control knob counterclockwise (-)
(Fig. 16).
6. Stand far back from the item that you wish to
spray. This will reduce the force of the water at
the point of contact.
a. Spray a small area and then check the surface for damage. If no damage
is found continue spraying.
b. Slowly move forward while spraying. Stop when you have the desired
result or if the spray is damaging the item.
c. Adjust the water pressure using the Pressure Adjusting Knob (N).
d. Consider using a pressure tip with a wider arc if there is not enough
room to stand further away. This will have less force and allow you to be
closer to the item.
7. Aim at an angle that will allow the water to deflect off the object and not back
at yourself. A 45° degree angle is a good starting point.
8. Squeeze the trigger fully and spray the object. Continue until the task
is complete.
a. If you must stop for more than a few moments before completing the
task, stop the engine and release pressure from the pressure
washer’s system.
9. Spray from the bottom up when cleaning and from the top down when rinsing
to reduce water marks or streaks.
APPLYING CHEMICALS OR DETERGENTS
WARNING! Follow all safety precautions for the chemical or cleaning solution
when handling and spraying. Consult the Safety Data Sheet for the product
if available.
The pressure washer can spray a mixture of water and chemicals or detergents.
Fig. 16

V 4.0 4.2 GPM @ 4,000 PSI Gas Pressure Washer 8643926
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The chemical or detergent is siphoned into the pump outlet and is mixed during
spraying. Only use the soap pressure nozzle (black) as it is designed for mixing
the solutions.
1. Prepare the chemical or detergent per the instructions with the product.
2. Press the open end of the siphon hose onto
barbed detergent injector fitting (B) located
on the pump outlet (Fig. 17-1).
3. Press the siphon hose with the filter
attachment into the container holding
chemical or detergent. Make sure the filter is
fully submerged in the solution to avoid
drawing air into the system.
4. Install the soap pressure nozzle (black).
5. Start the pressure washer as instructed in this manual and the Engine manual.
6. Spray the solution following the instructions in the Spraying section.
7. Apply solution to a dry surface, starting at the lower portion of area to be
washed and work upward, using long, even, overlapping strokes.
a. Allow detergent to soak in for 3 to 5 minutes before washing and rinsing.
Reapply as needed to prevent the surface from drying. DO NOT allow
detergent to dry on (prevents streaking).
b. Consult the chemical instructions to determine if it should be rinsed off
and the time needed to soak before rinsing.
8. Clean the pressure washer after using chemicals or detergents by placing the
filter end of the siphon hose in a container of clean water. Turn on the pressure
washer at low pressure and spray to draw clean water through the system to
flush it out. This will take 1 to 2 minutes.
CARE & MAINTENANCE
1. Maintain the tool with care. A tool in good condition is efficient, easier to
control and will have fewer problems.
Fig. 17
17-1

8643926 4.2 GPM @ 4,000 PSI Gas Pressure Washer V 4.0
20 For technical questions call 1-800-665-8685
2. Inspect the tool fittings, alignment and hoses periodically. Have damaged or
worn components repaired or replaced by an authorized technician. Only use
identical replacement parts when servicing.
3. Only use accessories intended for use with this tool.
4. Keep the tool handles clean, dry and free from oil/grease at all times.
5. Maintain the tool’s labels and name plates. These carry important information.
If unreadable or missing, contact Princess Auto Ltd. for replacements.
WARNING! Only qualified service personnel should repair the tool. An
improperly repaired tool may present a hazard to the user and/or others.
CHECK HIGH PRESSURE HOSE
WARNING! NEVER repair the high pressure hose. Repairs can fail and will be
weaker than the hose itself. A hose that fails while under pressure can inflict a
serious injury. Replace with a hose that has a maximum pressure rating that
exceeds the pressure washer’s maximum output.
The high pressure hose can develop leaks due to wear, kinking or misuse and
abuse. Inspect the hose each time before using it. Check the hose for cuts, leaks,
abrasions or bulging spots. Also check the couplings to ensure they are tight and
are not loose. Replace the hose immediately if any of these conditions exist.
CHECK SIPHON HOSE
1. Examine the filter on the detergent tube and clean if clogged.
2. The tube should fit tightly on the barbed fitting.
3. Examine the tube for leaks or tears. Replace the filter or tube if either
is damaged.
CHECK SPRAY GUN
Examine the hose connection to the spray gun and make sure it is secure. Check
that the trigger lock is in place to prevent accidental spraying. Replace the spray
gun immediately if the trigger lock is damaged or will not remain in place.
CHECK SPRAY WAND AND PRESSURE NOZZLES
A pulsing sensation felt when squeezing the trigger indicates either the spray wand or
the pressure nozzle is partially clogged and is causing pressure to build in the pump.