Part No. 1.194-301
Model G 2400 HH
Model K 2400 HH
Model K 2400 HB
Model HD 2500 HK
Part No. 1.194-302
Part No. 1.194-303
Part No. 1.194-115
High Pressure Washer Operator Manual
Overview . . . . . . . . . . . . . . . . . . . . . . . .1
Precautions . . . . . . . . . . . . . . . . . . . . .1-2
Assembly Instructions . . . . . . . . . . . . . . .3
Operating Instructions . . . . . . . . . . . . . . .4
Using the Accessories . . . . . . . . . . . . . .5
Working with Detergents . . . . . . . . . . . . .6
Shut Down and Clean-Up . . . . . . . . . . . .7
Taking a Break . . . . . . . . . . . . . . . . . . . .7
Winterizing and Long-Term Storage . . . .7
Cleaning Tips . . . . . . . . . . . . . . . . . . . .8-9
Optional Cleaning Accessories . . . . . . . .9
Troubleshooting . . . . . . . . . . . . . . . .10-11
Specifications
Model K 2400 HH
/ G 2400 HH
Operating pressure 2400 PSI
Water volume 2.5 GPM
Engine 5.0 HP Honda GC 160
Model K 2400 HB
Operating pressure 2400 PSI
Water volume
2.5 GPM
Engine 5.5 HP Briggs & Stratton
Model K 2500 HK
Operating pressure 2500 PSI
Water volume
2.5 GPM
Engine 6.0 HP Kohler Command
In USA Call:
1-800-537-4129
or visit our website:
Manual Part No. 9.139-106
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IMPORTANT PRECAUTIONS – Read First!
Water Supply
(Cold Water Only)
• Water hose must be at least 3/4 inch
in diameter.
• Flow rate of water supply must not fall
below 2.5 GPM (gallons per minute).
• Flow rate can be determined by running
the water for one minute into an empty
5-gallon container.
Safety Warnings
When using this product, basic precau-
tions should always be followed:
• Read all the instructions before using
the product.
• Fire hazard! Do not add fuel with the
engine running. Do not operate if fuel
has been spilled. Instead, move the
machine to a different location and avoid
creating sparks.
• Operate and fuel machine in a well
ventilated area, free of devices featuring
an open pilot or flame such as boilers,
water heaters, etc.
• High pressure jets can be dangerous
if subject to misuse. The jet must not
be directed at persons, animals,
electrical devices, or the machine itself.
• The water supply temperature must not
exceed 104°F/40°C.
• Never use the pressure washer to draw
in water contaminated with solvents, e.g.
paint thinners, gasoline, oil, etc.
• Always prevent debris from being
drawn into the unit by using a clean
water source.
• Wear safety goggles.
We strongly recommend that this high
pressure washer not be left running for
periods of 5 minutes or longer without
the trigger gun being engaged.
• Do not use acids, alkaline, solvents, or
any flammable material in this product.
These products can cause physical
injuries to the operator and irreversible
damage to the machine.
2
This Kärcher high pressure washer is
equipped with thermal protection to extend
the life of your pressure washer. The
thermal protector will automatically
activate at a predetermined high
• The machine has hot surfaces which can
cause burns. Operate the unit in a safe
environment and away from children.
• Do not allow the high pressure hose to
come into contact with the muffler guard.
temperature ejecting hot water before
resetting. This ensures that the pump does
not become damaged.
• Do not leave the machine running
unattended.
• Learn how to stop the machine and
release pressure quickly. Be thoroughly
familiar with the controls.
• Stay alert — watch what you are doing.
• Do not operate the product when
fatigued or under the influence of
alcohol or drugs.
Caution
•
•
Follow the maintenance instructions
specified in the manual.
• Do not stand on unstable surfaces. Stand
with both feet balanced at all times.
This machine has been designed
for use with cleaning detergents
supplied or recommended by
the manufacturer. The use of other
cleaning detergents may affect the
operation of the machine and void
the warranty.
• Avoid tipping the machine on its side.
• The Gun Safety Lock PREVENTS
the trigger from accidentally being
engaged. This safety feature DOES
NOT lock trigger in the on position.
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ASSEMBLY INSTRUCTIONS
Step1 Attach the handle to the frame of Step2
Attach the gun/hose
storage handle.
the pressure washer. Align holes, insert bolts,
and tighten with knobs.
3
Step3 Attach the wand
to the spray gun.
Step4
Attach the
triple jet nozzle.
Step5
Attach the high
pressure hose to the spray
gun.
Step6 Connect the high Step7
Connect the
garden hose to unit’s water
inlet.
Step8
Attach the
detergent tray.
pressure hose to the unit’s
high pressure outlet.
(optional, not on G2400 HH)
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OPERATING INSTRUCTIONS
NOTE: Engines controls shown may appear different.
Step1
Check oil level. Oil
level should be level with the
bottom of the oil filler neck. Be
sure the machine is level when
checking the oil level. (Refer to
the engine’s operating manual
for seasonal grades.) We
recommend that the oil be
changed after the first 5 hours
of use, then once every 50
hours.
Step2
Fill gas tank
with unleaded gasoline.
Note: Improper oil levels will cause low oil sensor to shut off engine.
Do not use leaded gasoline.
Step3
Connect
Step4
Trigger the gun
Step5 (Honda)
Slide
4
garden hose to the cold
water source and turn water
on completely. Never use
hot water.
to eliminate trapped air, wait
for a steady flow of water to
emerge from the spray nozzle.
the choke lever out to the
closed position (on a warm
engine, leave the choke lever
in the open position).Slide the
throttle lever up about 1/3 of
the way toward the fast
position.
Step5 (Briggs & Stratton)
Turn fuel valve to “ON”. Slide
the throttle control to the
fast position. Move the
choke lever to the “CHOKE”
position (only if the engine
is cool). After starting, move
the choke to “RUN”.
Step5 (Kohler) Turn fuel
valve to “ON”. Slide the
throttle control to the fast
position. Move the choke
lever to the “CHOKE”
position (only if the engine
is cool). After starting, move
the choke to “RUN”.
Step6
Pull the starter
handle. If the engine fails to
start after 3 pulls, squeeze
the trigger gun to release
pressure, and repeat step.
Important!
After the engine warms up
enough to run smoothly,
move choke to open position
and throttle to fast position.
Do not run the engine with a high or low oil level as this can
cause engine damage.
If you have further questions regarding the engine, please refer to
the engine’s operating manual included with the unit.
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USING THE ACCESSORIES
The triple jet nozzle must be positioned to one of the two settings for high pressure cleaning
by turning the nozzle tip. The pencil jet spray (0º) should be used for stubborn dirt. The High
pressure flat spray (25º) should be used for cleaning over a large surface area. The third set-
ting on the triple jet nozzle is used for the application of detergents.
High pressure
pencil jet cleaning.
High pressure fan
jet cleaning.
5
Low pressure Detergent
application “CHEM”
position.
Dirtblaster® nozzle
This nozzle features a 0º pencil jet which rotates 360º for maximum dirt cutting action,
effectively increasing cleaning performance up to 50%. This nozzle combines the cleaning
performance of a 0º pencil jet with the surface coverage of a wide angle nozzle.
Not recommended for soft materials, siding, painted surfaces, decks or autos.
WARNING
TO AVOID SERIOUS INJURY,
NEVER POINT SPRAY NOZZLE
AT YOURSELF, OTHER PER-
SONS OR ANIMALS.
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WORKING WITH DETERGENTS
NOTE: Detergents can only be applied in the “CHEM” setting.
For best results see Cleaning Tips
on pages 8 & 9 for specific informa-
tion on how to clean
different surfaces.
Always Use Kärcher
Detergents for Best Results.
Step1
Use triple jet nozzel (set to
CHEM. position) to apply detergents
Kärcher biodegradable detergents are
specially formulated to protect the
environment and your pressure washer.
The special formula won’t clog the suction
tube filter and will protect the internal parts
of the pressure washer for a longer life.
For Kärcher Detergents, check your
retailer or call:
Step2
Adjust the filter end of the
detergent tube for light (-), or maximum (+)
detergent coverage.
6
In USA Call:
1-800-537-4129
or visit our website:
The following Kärcher detergents
are available:
• Vehicle Wash
• Degreaser
• House Wash
• Deck Wash
Step3
Fill a container with Kärcher
detergent. Place the filter end of detergent
suction tube into the detergent.
• All Purpose Cleaner
Caution
Never use:
• Bleach, Chlorine products and other
corrosive chemicals
• Liquids containing solvents
(i.e., paint thinners, gasoline, oils)
• Tri-sodium phosphate products
• Ammonia products
• Acid-based products
These chemicals will harm the unit and
will damage the surface being cleaned.
Step4
With the engine running, pull
trigger to operate unit. Liquid detergent is
drawn into the unit and mixed with water.
Apply detergent to work area. Do not allow
detergent to dry on surface.
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SHUTTING DOWN & CLEAN-UP
Step1 Remove de- Step2
Press
tergent suction tube from the throttle down to
container and insert into stop the engine. If
one gallon of fresh water. the engine has a
Step3
Turn
off water supply.
Step4
Press
trigger to release
water pressure.
Siphon water at low
pressure for one minute.
fuel valve or swich
turn off
7
Step5
Disconnect the
garden hose from the water
inlet on the unit.
Step6
Disconnect the
high pressure hose from the
high pressure outlet.
Step7
Engage the
gun safety lock.
TAKING A BREAK... five minutes or more
Step1 Slide the throttle
Step2
Press trigger to
down to stop the engine. If the release water pressure.
engine has a fuel valve or
Step3
safety lock.
Engage gun
switch turn off
WINTERIZING AND LONG-TERM STORAGE
1. Disconnect all water connections.
5. Store the machine and accessories in
a room which does not reach freezing
temperatures.
2. Turn on the machine for a few seconds,
until the remaining water exits.
Turn off immediately.
Caution: Failure to follow the above
directions will result in damage to the
pump assembly and accessories.
3. Drain the gas and oil from the engine.
4. Do not allow high pressure hose
to become kinked.
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CLEANING TIPS
Cement Patios,
Brick and Stone
(with or without detergent)
Deck Cleaning
(with or without detergent)
Pre-rinse deck and surrounding area with
fresh water. If using Kärcher Deck Wash,
place detergent suction tube directly into
cleaning solution and apply to surface at low
pressure. For best results, limit your work
area to smaller sections of approximately 25
square feet. Allow Kärcher Deck Wash to
remain on surface 1-3 minutes. Do not allow
detergent to dry on surface. Rinse at high
pressure in a long sweeping motion keeping
the spray nozzle approximately 3-6 inches
from the cleaning surface. Always clean
from top to bottom and from left to right.
When moving on to a new section of the
cleaning surface, be sure to overlap the
previous section to eliminate stop marks
and ensure a more even cleaning result.
Pre-rinse cleaning surface with fresh water.
If using Kärcher All Purpose Cleaner, place
detergent suction tube directly into cleaning
solution and apply to surface at low
pressure. For best results, limit your work
area to smaller sections of approximately 25
square feet. Allow Kärcher All Purpose
Cleaner to remain on surface 1-3 minutes.
Do not allow detergent to dry on surface.
Rinse at high pressure in a sweeping
motion keeping the spray nozzle
approximately 3-6 inches from the cleaning
surface. Always clean from top to bottom
and from left to right. For removing
extremely stubborn stains, use Kärcher
Dirtblaster® Nozzle.
Caution: Do not use Dirtblaster® nozzle on
wood surface as it may cause damage.
Cars, Boats & Motorcycles
(with or without detergent)
8
House Siding
Pre-rinse vehicle with fresh water. If using
Kärcher Vehicle Wash, place detergent
suction tube directly into cleaning solution
and apply to surface at low pressure.
For best results, clean one side of vehicle at
a time and always apply detergent from
bottom to top, do not allow detergent to dry
on surface. Rinse at high pressure in a
sweeping motion keeping the spray nozzle
approximately 6-8 inches from the cleaning
surface (distance should increase when
rinsing pin-striping or other sensitive
surfaces). Always clean from top to bottom
and from left to right. For best results,
wipe surface dry with a chamois or
(with or without detergent)
Pre-rinse cleaning surface with fresh water.
If using Kärcher House Wash, place
detergent suction tube directly into cleaning
solution and apply to surface at low
pressure (for best results, limit your work
area to sections of approximately 6 feet and
always apply detergent from bottom to top).
Allow Kärcher House Wash to remain on
surface 1-3 minutes. Do not allow detergent
to dry on surface, if surface appears to be
drying, simply wet down surface with fresh
water.
If needed, use special Wash Brush
Attachment to remove stubborn dirt.
Rinse at high pressure from top to bottom in
an even sweeping motion keeping the spray
nozzle approximately 6 inches from the
cleaning surface.
soft dry cloth.
Caution: Do not use Dirtblaster® nozzle on
vehicles as it may cause damage.
Caution: Do not use Dirtblaster® nozzle on
siding as it may cause damage.
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CLEANING TIPS – continued
Barbecue Grills, Outdoor Power
Equipment &
Patio & Lawn Furniture
(with or without detergent)
Gardening Tools
Pre-rinse furniture and surrounding area with
fresh water. If using Kärcher All Purpose
Cleaner, place detergent suction tube direct-
ly into cleaning solution and apply to surface
at low pressure. Allow Kärcher All Purpose
Cleaner to remain on surface 1-3 minutes.
Do not allow detergent to dry on surface.
Rinse at high pressure in a sweeping motion
keeping the spray nozzle approximately 3-6
inches from the cleaning surface. For best
results, clean from top to bottom and from
left to right.
(with or without detergent)
Pre-rinse cleaning surface with fresh water. If
using Kärcher All Purpose Cleaner or
Degreaser, place detergent suction tube
directly into cleaning solution and apply
detergent at low pressure. Allow Kärcher
detergent to remain on surface 1-3 minutes.
Do not allow detergent to dry on surface.
Rinse at high pressure keeping the spray
nozzle approximately 3-6 inches from the
cleaning surface. For removing extremely
stubborn dirt, it may be necessary to move
the spray nozzle even closer to the surface
for greater dirt cutting action. To remove
caked-on mud from garbage cans, lawn
mower blades, wheelbarrows or other
non-sensitive metal surfaces, you may
want to use the Kärcher Dirtblaster® Nozzle.
Caution: Do not use Dirtblaster® nozzle
on patio or lawn furniture as it may cause
damage.
Recommendations:
• Before cleaning any surface an inconspicu-
ous area should be cleaned to test spray
pattern and distance for maximum cleaning
results.
Caution: Do not use Dirtblaster® spray nozzle
on cloth, plastic or other sensitive surfaces
as it may cause damage.
9
• If painted surfaces are peeling or chipping,
use extreme caution as pressure washer
may remove the loose paint from the
surface.
OPTIONAL CLEANING ACCESSORIES
Optional cleaning accessories are available to further enhance your cleaning capabilities.
See accessories order form for product descriptions and ordering instructions.
• Dirtblaster® nozzle
• Hose Reel
• Extension Wand 80”
• Rotating Wash Brush
• Sand Blasting Attachment
• Pipe Drain Cleaner
• Extension Hose 30’
• Detergent Tray
In USA Call:
1-800-537-4129
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TROUBLESHOOTING
Disconnect the machine from the power source before making any repair.
Symptom
Cause
Solution
Engine will not
start.
No gasoline.
Fill gas tank.
Low oil level sensor activated. Add oil.
Choke is not in correct position. Slide choke lever out to closed position.
Engine throttle is not in
correct position.
Slide the throttle lever up about 1/3
of the way toward the fast positon.
Pressure built up in the
high pressure washer.
Squeeze the trigger to
release the pressure.
Unit does not reach Diameter of garden hose
Replace with a 3/4 inch
garden hose.
high pressure.
is too small.
Water supply is restrict-
ed.
Check garden hose for kinks,
leaks and blockage.
Not enough inlet water supply. Open water source full force.
10
Water inlet filter is
clogged.
Remove filter and rinse out
in warm water.
Black detergent nozzle is
attached.
Remove black detergent nozzle
and attach a high pressure nozzle.
Output pressure
Not enough inlet water
Turn water on full force. Check garden
hose for kinks, leaks or blockage.
varies high and low. supply.
Pump is sucking air.
Check that hoses and fittings are
air tight. Turn off machine and
purge pump by squeezing trigger
gun until a steady flow of water
emerges through the nozzle.
Water inlet filter is
clogged.
Remove filter and rinse out
in warm water.
Discharge nozzle
is obstructed.
Blow out or remove debris
with a fine needle.
Calcified gun, hose
or spray wand.
Run distilled vinegar through
detergent suction tube.
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TROUBLESHOOTING – continued
Symptom
Cause
Solution
No detergent.
Detergent suction tube
not properly connected
to the machine.
Check connection.
Detergent is too thick.
Dilute detergent. For best results,
use Kärcher detergent.
Detergent filter valve is
at lowest setting.
Set detergent filter valve to a high-
er setting.
Filter on detergent suc-
tion tube is clogged.
Run warm water through filter to
remove debris.
Damaged or clogged
detergent suction tube.
Remove obstruction or
replace detergent suction tube.
A high pressure
nozzle is attached.
Replace with black
detergent nozzle.
Discharge nozzle
is obstructed.
Blow out or remove debris
with fine needle.
Garden hose
connection leaks.
Loose fittings.
Tighten fittings.
11
Missing/worn rubber washer. Insert new washer.
Spray wand leaks.
Spray wand not properly
attached.
Slide the spray wand into the gun.
Turn the wand collar clockwise onto
the gun threads until tight.
Broken o-ring.
Call Kärcher customer service
hotline and order an o-ring.
Pump is noisy.
Pump is sucking air.
Check that hoses and fittings are
air tight. Turn off machine and
purge pump by squeezing trigger
gun until a steady flow of water
emerges through the nozzle.
Water leaks
from pump.
Loose fittings.
Check that all fittings are tight.
Call service center.
Water seals are
damaged or worn.
Thermal protection
device is activated.
Thermal protection
device will auto reset.
Oil Drip.
Oil seals are damaged
or worn.
Call service center.
If you encounter any additional
difficulties not listed, please call
our service center for help.
In USA Call:
1-800-537-4129
Kärcher Customer Support USA
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