Generac Portable Products 2400PSI User manual

High Pressure Washer Owner’s Manual
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2400PSI
Model No. 1440-0 (2,400 PSI High Pressure Washer) Manual No. B5740 Revision 2 (9/11/2000)
Visit our Generac website: www.generac-portables.com
Problems?
Questions?
Before taking your unit
back to the store,
call the pressure washer
helpline at
1-800-270-1408
M-F 8-5 CT

Generac Portable Products 2,400 PSI High Pressure Washer
2
EQUIPMENT
DESCRIPTION
CONGRATULATIONS on your purchase of a
GENERAC high pressure washer. It has been designed,
engineered and manufactured to give you the best possible
dependability and performance.
This manual contains information for a high pressure
washer that operates at 2,400 PSI at a flow rate of
2.2 gallons per minute. This high quality residential system
features large 10” wheels, brass pump head construction,
axial cam pump with stainless steel pistons, automatic cool
down system, chemical injection system, adjustable spray
nozzle. Includes safety goggles, heavy duty 25’ hose, and
more.
Please read and retain this manual. The instructions will
enable you to assemble your unit without tools, and
maintain your high pressure washer properly.
Every effort has been made to ensure that the information
in this manual is both accurate and current. However,
Generac reserves the right to change, alter or otherwise
improve the product and its documentation at any time
without prior notice.
Should you experience any problem you cannot easily
remedy, call the pressure washer helpline at
1-800-270-1408.
CUSTOMER
RESPONSIBILITIES
• Read and observe the safety rules.
• Follow regular schedule in maintaining, caring for and
using your high pressure washer.
• For off-season storage, review “Preparing the Unit for
Storage” on page 14.
SAFETY RULES
CAUTION! When setting up, transporting,
adjusting or making repairs to your high pressure
washer, always disconnect the spark plug wire from
the spark plug and place the wire where it cannot
contact spark plug.
DANGER! Engine exhaust gases contain DEADLY
carbon monoxide gas. This dangerous gas, if
breathed in sufficient concentrations, can cause
unconsciousness or even death. Operate this
equipment only in the open air where adequate
ventilation is available.
DANGER! Gasoline is highly FLAMMABLE and its
vapors are EXPLOSIVE. Do Not permit smoking,
open flames, sparks or heat in the vicinity while
handling gasoline. Avoid spilling gasoline on a hot
engine. Allow unit to cool for 2 minutes before
refueling. Comply with all laws regulating storage
and handling of gasoline.
Read this manual carefully and become familiar
with your pressure washer. Know its applications,
its limitations, and any hazards involved.
• Locate this pressure washer in areas away from
combustible materials, combustible fumes or dust.
• The high pressure equipment is designed to be used with
Generac authorized parts only. If you use this equipment
with parts that do not comply with minimum
specifications, the user assumes all risks and liabilities.
• Some chemicals or detergents may be harmful if inhaled
or ingested, causing severe nausea, fainting or poisoning.
The harmful elements may cause property damage or
severe injury.
•Do Not allow CHILDREN to operate the pressure
washer at any time.
The engine exhaust from this product
contains chemicals known to the State
of California to cause cancer, birth
defects, or other reproductive harm.
WARNING:

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• Operate engine only at governed speed. Running the
engine at excessive speeds increases the hazard of
personal injury. Do Not tamper with parts which may
increase or decrease the governed speed.
•Do Not wear loose clothing, jewelry or anything that
may be caught in the starter or other rotating parts.
• Before starting the pressure washer in cold weather,
check all parts of the equipment and be sure ice has not
formed there.
•Never use a spray gun which does not have a trigger
lock or trigger guard in place and in working order.
• Keep the hose connected to machine or the spray gun
while the system is pressurized. Disconnecting the hose
while the unit is pressurized is dangerous.
•Never operate units with broken or missing parts, or
without protective housing or covers.
• Check the fuel system for leaks or signs of deterioration,
such as chafed or spongy hose, loose or missing clamps,
or damaged tank or cap. Correct all defects before
operating the pressure washer.
•Do Not spray flammable liquids.
• Use a respirator or mask whenever there is a chance
that vapors may be inhaled. Read all instructions with
mask so you are certain the mask will provide the
necessary protection against inhaling harmful vapors.
•Never aim the gun at people, animals or plants. The high
pressure stream of water that this equipment produces
can pierce skin and its underlying tissues, leading to
serious injury and possible amputation.
•Never allow any part of the body to come in contact
with the fluid stream. Do Not come in contact with a
fluid stream created by a leak in the high pressure hose.
• Always wear eye protection when you use this
equipment or when you are in the vicinity where the
equipment is in use.
• High pressure spray can cause paint chips or other
particles to become airborne.
•Do Not operate the pressure washer above the rated
pressure.
•Never move the machine by pulling on the high pressure
hose. Use the handle provided on the unit.
• Always be certain the spray gun, nozzles and accessories
are correctly attached.
•Do Not secure the spray gun in the (open) position.
• High pressure spray may damage fragile items including
glass. Do Not point spray gun at glass when in the jet
spray mode.
• Hold the spray gun firmly in your hand before you start
the unit. Failure to do so could result in an injury from a
whipping spray gun. Do Not leave the spray gun
unattended while the machine is running.
• The cleaning area should have adequate slopes and
drainage to reduce the possibility of a fall due to slippery
surfaces.
• Keep water spray away from electric wiring or fatal
electric shock may result.
•Do Not by–pass any safety device on this machine.
• The muffler and engine heat up during operation and
remain hot immediately after shutting it down. Avoid
contact with a hot muffler or engine as you could be
severely burned.
• Operate and store this unit on a stable surface.
• High pressure hose can develop leaks from wear, kinking,
abuse, etc. Water spraying from a leak is capable of
injecting material into skin. Inspect hose each time before
using it. Check all hoses for cuts, leaks, abrasions or
bulging of cover, or damage or movement of couplings. If
any of these conditions exist, replace hose immediately.
Never repair high pressure hose. Replace it with
another hose that exceeds maximum pressure rating of
your unit.
• The muffler and air cleaner must be installed and in good
condition before operating the pressure washer. These
components act as spark arresters if the engine backfires.
In the State of California a spark arrester is required by law
(Section 4442 of the California Public Resources Code).
Other states may have similar laws. Federal laws apply on
federal lands.
NOTE: If you equip the muffler with a spark arrester, it
must be maintained in effective working order. You can
order a spark arrester through your authorized Briggs and
Stratton service dealer.

Generac Portable Products 2,400 PSI High Pressure Washer
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KNOW YOUR PRESSURE WASHER
Read this owner’s manual and safety rules before operating your high pressure washer.
Compare the illustrations with your high pressure washer to familiarize yourself with the locations of various controls and
adjustments. Save this manual for future reference.
Adjustable Nozzle — Always attached to nozzle extension.
Adjustable nozzle allows you to adjust force of spray and spray
pattern.
Air Cleaner — Dry type filter element limits the amount of
dirt and dust that gets in the engine.
Automatic Cool Down System — Cycles water through
pump when water reaches 140°-145°F. Warm water will
discharge from pump onto ground. This system prevents
internal pump damage.
Engine Choke Control — Permits easier engine starting.
Fuel Cap — Fill with clean unleaded fuel here.
High Pressure Hose — Connect one end to water pump
and the other end to spray gun.
High Pressure Outlet — Connection for pressure hose.
Nozzle Extension — Attach to spray gun to use adjustable
nozzle.
Oil Fill Cap/Dipstick — Used for checking and adding oil.
Pump — Develops high pressure.
Recoil Starter — Used for starting the engine manually.
Safety Goggles — Always wear eye protection when
operating pressure washer.
Spray Gun — Controls the application of water onto
cleaning surface with trigger device. Includes safety latch.
Throttle Lever — Sets engine in starting mode for recoil
starter and stops a running engine.
Water Inlet — Connection for garden hose.
High Pressure Hose
Safety Goggles
Adjustable Nozzle
Engine Choke
Control and
Throttle Lever
High Pressure Outlet
Pump equipped with Automatic
Cool Down System
Spray Gun
Fuel Cap
Water Inlet
Oil Fill
Cap/Dipstick
Recoil Starter
Nozzle Extension
Air Cleaner

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WARNING! Read entire owner’s manual before
you attempt to assemble or operate your new
pressure washer.
REMOVE PRESSURE
WASHER FROM
CARTON
• Remove the high pressure hose and parts box included
with pressure washer.
• Slice two corners at the end of carton from top to
bottom so the panel can be folded down flat, then
remove all packing material.
• Roll pressure washer out of carton.
CARTON CONTENTS
Items in the carton include:
• Main Unit
• Parts Box (which includes the following):
- Wireform
- High Pressure Hose
- Goggles
- Handle Assembly
- Handle Fastening Hardware
- Nozzle Cleaning Kit
- Owner’s Manual
- Engine Manual
- Spray Gun
- Nozzle Extension
- Oil Bottle
- O-ring Maintenance Kit
If any of the above parts are missing or damaged, call the
pressure washer helpline at 1–800–270–1408.
PREPARING PRESSURE
WASHER FOR USE
If you have any problems with the assembly of your
pressure washer or if parts are missing or damaged, call the
pressure washer helpline at 1-800-270-1408.
To prepare your pressure washer for operation, you
will need to perform these tasks:
• Attach the handle and wire form.
• Attach nozzle extension to spray gun.
• Connect the high pressure hose to the spray gun and the
pump and connect the water supply to the pump.
• Add oil to the engine crankcase.
• Add fuel to the fuel tank.
Attach Handle and Wire Form
NOTE: All assembly operations given in this section will
be described from the perspective of assembling the
pressure washer from the rear.
• Place the handle onto the handle supports already
connected to the main unit. Make sure the holes in the
handle align with the holes on the handle supports
(Figure 1).
NOTE: It may be necessary to move the handle supports
from side to side in order to align the handle so it will slide
over the handle supports.
Figure 1 — Attach Handle to Base
Make sure the
holes on the
handle are
aligned with the
holes on the
handle supports
Handle
Handle
Supports

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• Insert the carriage hook through the left hole (facing the
front of the unit). Pull the recoil handle out of the engine
slowly. Place the recoil string through the hook and
attach the plastic knob. Tighten by hand (Figure 2).
• Insert the carriage bolt through the right hole (facing the
front of the unit) and attach a plastic knob. Tighten by
hand (Figure 2).
• Insert the wire support with the longer arm positioned
on the left. From the rear of unit, the hook should
resemble a “J” (Figure 3).
Add Engine Oil
IMPORTANT: Any attempt to crank or start the engine
before it has been properly serviced with the
recommended oil may result in an engine failure.
• Place pressure washer on a level surface.
• Refer to engine owners manual to add recommended oil
to engine.
NOTE: Check Oil Often During Engine Break–in.
Add Gasoline
DANGER! Never fill fuel tank indoors. Never fill
fuel tank when engine is running or hot. Do Not
smoke when filling fuel tank.
WARNING! Never fill fuel tank completely full.
Provide space for fuel expansion. Wipe away any
fuel spillage from engine and equipment before
starting.
• Use fresh, clean unleaded automotive gasoline and store
in approved, clean, covered containers. Use clean fill
funnels. Never use “stale” gasoline left over from last
season or gasoline stored for long periods.
• Clean area around fuel fill cap, remove cap.
• Slowly add “UNLEADED” regular gasoline to fuel tank.
Use a funnel to prevent spillage. Slowly fill tank to about
1/2” below the bottom of the filler neck (Figure 4).
• Install fuel cap and wipe up any spilled gasoline.
Connect Hose and Water Supply to
Pump
IMPORTANT: You must attach all hoses before you start
the engine. Starting engine without all hoses connected and
water supplied will damage the pump.
• Uncoil the high pressure hose and attach one end of the
hose to the base of the spray gun (Figure 5). Tighten by
hand.
Figure 2 — Secure Handle
Figure 4 — Add Gasoline to Fuel Tank.
Figure 3 — Attach Wire Form to Handle

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• Attach the other end of the high pressure hose to the
high pressure fitting on the pump (Figure 6). Tighten by
hand.
• Before you connect your garden hose to the water inlet,
inspect the inlet screen (Figure 7). Clean the screen if it
contains debris, replace it if it is damaged. DO NOT
RUN THE PRESSURE WASHER IF THE SCREEN IS
DAMAGED.
• Run water through your garden hose for 30 seconds to
clean out any debris. Turn off water.
• Connect the garden hose to the water inlet. Tighten by
hand (Figure 7).
WARNING! There MUST be at least ten feet of
unrestricted garden hose between the pressure
washer inlet and any flow shut off device, such as a
‘Y’ shut-off connector or other convenience-type
water shut-off valve. Damage to pressure washer
resulting from disregarding this warning will not be
covered by the warranty.
• Turn ON the water.
• Squeeze the trigger on the gun until you have a steady
stream of water. This purges the pump of air and
impurities.
CAUTION! Before starting the pressure washer,
be sure you are wearing adequate eye protection.
CHECKLIST BEFORE
STARTING ENGINE
Review the unit’s assembly to confirm you have performed
all of the following:
• Make sure the handle and wireform are in place and
secure.
• Check that oil has been added to the proper level in the
engine crankcase.
• Add the proper gasoline to fuel tank.
• Check for properly tightened hose connections.
• Check to make sure that there are no kinks, cuts, or
damage to the high pressure hose.
• Provide a proper water supply (not to exceed 140°F) at
an adequate flow.
• Be sure to read “Safety Rules” and “How To Start the
Engine” before operating your pressure washer.
Connect High Pressure
Hose Here
Connect High
Pressure Hose
Here
Connect
Garden Hose
Here
Figure 5 — Connect High Pressure Hose to Gun.
Figure 6 — Connect High Pressure Hose to Water Outlet.
Figure 7 — Connect Garden Hose to Water Inlet.

Generac Portable Products 2,400 PSI High Pressure Washer
8
HOW TO USE YOUR
PRESSURE WASHER
If you have any problems operating your pressure washer,
please call the pressure washer helpline at
1-800-270-1408.
How to Start Your Engine
The best way to start your engine-powered pressure
washer for the first time is to follow these instructions
step-by-step. You may also refer to your engine owner’s
manual. This starting information also applies whenever you
start the engine after you have let the pressure washer sit
idle for at least a day.
• Place the pressure washer in an area close enough to an
outside water source capable of supplying water at a
flow rate greater than 2.4 gallons per minute.
• Check that the high pressure hose is tightly connected to
the spray gun and to the pump. See “Preparing Pressure
Washer for Use” on page 5.
• Make sure unit is in a level position.
• Connect the garden hose to the water inlet on the
pressure washer pump. Turn ON the water.
CAUTION! Do Not run the pump without the
water supply connected and turned on. You must
follow this caution or the pump will be damaged.
• Rotate the choke control to the “CHOKE” position
(Figure 8).
NOTE: For a warm engine, be sure the choke control is in
the “RUN” position.
• Move throttle lever to “Fast” position, shown in
Figure 9 as a rabbit. Always keep the throttle in the
“Fast” position while pressure washing.
• Ensure the nozzle extension is NOT attached to the
spray gun. Stand at the rear of the unit, as shown in
Figure 10 (your unit will appear slightly different).
Figure 9 — Throttle Lever
Figure 10 — Recommended Engine Starting Posture
Right Hand
pulls recoil
starter handle
Safety Goggles
Left Hand stabilizes
unit and squeezes
trigger
Do Not attach
either nozzle
extension
Figure 8 — Choke Positions

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• Grasp the spray gun with your left hand and squeeze
the trigger on the spray gun. Water will flow out of the
spray gun in a thin stream. Continue to squeeze the
trigger. Your left hand will also serve to steady the unit
if you rest it on the handle, as shown.
• Grasp the recoil starter handle with your right hand
and pull slowly until you feel some resistance. Then pull
rapidly to start the engine.
• Return the starter grip handle slowly. Do Not let rope
“snap back” against starter.
• If the choke control was placed in the “Choke” position
to start the engine,move it slowly to the “Run” position
as the engine warms up enough to run smoothly.
• If the engine fails to start, review instructions given in the
engine owner’s manual.
• With the engine running, engage the safety latch to the
spray gun trigger (Figure 11).
• Attach the nozzle extension to the spray gun. Tighten by
hand (Figure 12).
How to Stop Your Pressure Washer
• Move throttle lever on engine to “Stop” position.
•Squeeze trigger on the spray gun to relieve
pressure in the hose.
NOTE: A small amount of water will squirt out when you
release the pressure.
How to Use the Adjustable Nozzle
You now should know how to START your pressure
washer and how to STOP it. The information in this
section will tell you how to adjust the spray pattern and
apply detergent or other cleaning chemicals.
DANGER! Never adjust spray pattern when
spraying. Never put hands in front of nozzle to
adjust spray pattern.
On the end of your spray gun nozzle extension is a nozzle
that permits you to adjust the spray pressure and pattern,
as follows:
• Slide the nozzle forward to adjust the spray to low
pressure mode, slide it backward to achieve high
pressure (Figure 13).
Figure 13 - Adjusting Nozzle Pressure
Slide nozzle backward
for high pressure mode.
Slide nozzle forward for
low pressure mode and
detergent application.
Figure 11 — Spray Gun with Safety Latch Engaged
Safety Latch
Figure 12 — Connect Nozzle Extension to Spray Gun

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• Twisting the nozzle adjusts the spray pattern from a
narrow pattern to a fan pattern Figure 14).
• Point the nozzle down toward a hard surface and press
the trigger to test the pattern (Figure 15).
• For most effective cleaning, keep the spray nozzle
between 8 to 24 inches away from cleaning surface.
• If you get the spray nozzle too close, especially using high
pressure mode, you may damage the surface being
cleaned.
•Do Not get closer than 6 inches when cleaning tires.
Applying Detergent with the
Adjustable Nozzle
IMPORTANT: Use soaps designed specifically for
pressure washers. Household detergents could damage
the pump.
IMPORTANT: You must attach all hoses before you
start the engine. Starting the engine without all the hoses
connected and without the water turned ON will damage
the pump.
To apply detergent, follow these steps:
• Review the use of the adjustable nozzle.
• Prepare detergent solution as required by the job.
• Hang the detergent solution on the hook of the
wireform attached to the handle.
• Place the small filter end of the detergent siphoning tube
into the detergent container (Figure 16).
CAUTION! Keep the detergent siphoning tube
from coming in contact with the hot muffler. This
will damage the plastic tube. When inserting the
filter into a cleaning solution bottle, route the tube
so as to keep it from inadvertently contacting the
hot muffler.
• Make sure the garden hose is connected to the water
inlet. Check that the high pressure hose is connected to
the spray gun and the pump.
• Start the engine, then attach the nozzle extension.
• Slide the adjustable nozzle forward to low pressure
mode. Detergent cannot be applied with the nozzle in
high pressure position.
Figure 16 — Insert Filter into Container.
Twist nozzle
counterclockwise for fan
spray pattern.
Twist nozzle clockwise
for narrow spray
pattern.
Figure 14 - Adjusting Nozzle Spray Pattern
Figure 15 — Test the Spray Pattern.

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• Apply detergent to a dry surface, starting from the
bottom and working up.
• Allow the detergent to “soak in” for 3-5 minutes before
washing and rinsing. Reapply as needed to prevent
surface from drying.
• For washing, start at lower portion of area to be washed
and work upward, using long, even, overlapping strokes.
Pressure Washer Rinsing
WARNING! Be extremely careful if you must use
the pressure washer from a ladder, scaffolding or
any other relatively unstable location. Pressure in a
running washer builds as you climb. When you press
the trigger, the recoil from the initial spray could
cause you to fall. The high pressure spray could also
cause you to fall if you are too close to the cleaning
surface.
For Rinsing:
• Slide the nozzle backward to high pressure, press the
trigger and wait for the detergent to clear.
NOTE: You can also stop detergent from flowing by
simply removing detergent siphoning tube from bottle.
• Keep the spray gun a safe distance from the area you
plan to spray.
• Apply a high pressure spray to a small area, then check
the surface for damage. If no damage is found, it is okay
to continue cleaning.
• Start at the top of the area to be rinsed, working down
with same overlapping strokes as you used for washing
and applying detergent.
Automatic Cool Down System
(Thermal Relief)
If you run the engine on your pressure washer for
3-5 minutes without pressing the trigger on the spray gun,
circulating water in the pump can reach a temperature
between 140–145°F. When the water reaches this
temperature, the automatic cool down system engages and
cools the pump by discharging the warm water onto
the ground. This system prevents internal damage to the
pump.

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SPECIFICATIONS
Outlet Pressure. . . . . . . . 2,400 psi
Flow Rate . . . . . . . . . . . . . 2.2 gallons per minute (gpm)
Detergent. . . . . . . . . . . . . Use detergent approved for
pressure washers
Water Supply Temp. . . . Not to Exceed 140°F
Automatic Cool . . . . . . . Will cycle when water
Down System reaches 140°-145°F
GENERAL MAINTENANCE
RECOMMENDATIONS
The pressure washer warranty does not cover items that
have been subjected to operator abuse or negligence. To
receive full value from the warranty, the operator must
maintain the high pressure washer as instructed in this
manual.
• Some adjustments will need to be made periodically to
properly maintain your high pressure washer.
• All maintenance in this manual and the engine owner’s
manual should be made at least once each season.
• Once a year you should clean or replace the spark plug,
clean or replace the air filter and check the gun and
adjustable nozzle extension assembly for wear. A new
spark plug and clean air filter assure proper fuel-air
mixture and help your engine run better and last longer.
Please refer to your engine owner’s manual for more
details.
BEFORE EACH USE
• Check engine oil level.
• Check water inlet screen for damage.
• Check high pressure hose for cracks or leaks.
• Check detergent siphoning tube and filter for damage.
• Check gun and adjustable nozzle extension assembly for
leaks.
• Rinse out garden hose to flush out debris before it is
attached to the pump.
PRESSURE WASHER
MAINTENANCE
Check and Clean Inlet Screen
Examine the screen on the water inlet. Clean it if the
screen is clogged or replace it if screen is damaged.
Check High Pressure Hose
The high pressure hose can develop leaks from wear,
kinking, or abuse. Inspect the hose each time before using
it. Check for cuts, leaks, abrasions or bulging of cover,
damage or movement of couplings. If any of these
conditions exist, replace the hose immediately.
WARNING! Water spraying from a leak is
capable of injecting material into skin. Inspect hose
each time before using it. Never repair a high
pressure hose. Replace it with another hose that
exceeds the maximum pressure rating of your
pressure washer.
Check Detergent Siphoning Tube
Examine the filter on the detergent tube and clean if
clogged. The tube should fit tightly on the barbed fitting.
Examine the tube for leaks or tears. Replace the filter or
tube if either is damaged.
Check In-Line Filter
Refer to Figure 17 and service the in-line filter if it
becomes clogged, as follows:
Nozzle Extension
Filter Screen
O-ring
Figure 17 — Clean In-Line Filter

Generac Portable Products 2,400 PSI High Pressure Washer
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1. Detach gun and nozzle extension from high pressure
hose. Detach nozzle extension from gun and remove
o-ring and screen from nozzle extension. Flush the
screen, gun, and adjustable nozzle extension with clean
water to clear debris.
2. If the screen is damaged, the o-ring kit contains a
replacement in-line filter screen and an o-ring. If
undamaged, reuse screen.
3. Place the in-line filter screen into the threaded end of
the nozzle extension. Direction does not matter. Push
the screen in with the eraser end of a pencil until it
rests flat at the bottom of the opening. Take care to
not bend the screen.
4. Place the o-ring into the recess. Push the o-ring snugly
against the in-line filter screen.
5. Assemble the nozzle extension to the spray gun, as
described earlier in this manual.
Check Gun and Nozzle Extension
Examine the hose connection to the gun and make sure it
is secure. Test the trigger by pressing it and making sure it
“springs back” into place when you release it. Put the
safety latch in the ON position and test the trigger. You
should not be able to press the trigger.
Purge Pump of Air and
Contaminants
To remove air from the pump, follow these steps:
• Set up the pressure washer as described in “Preparing
Pressure Washer For Use” (page 5). Connect the water
supply and turn water ON.
• Pull the trigger on the gun and hold.
• When the water supply is steady and constant, engage
the safety latch.
To remove contaminants from the pump, follow
these steps:
• Set up the pressure washer as described in “Preparing
Pressure Washer For Use” (page 5). Connect the water
supply and turn water on.
• Start the engine using instructions given earlier in this
manual.
• Squeeze the trigger on the gun and hold.
• When the water stream is steady and constant, engage
the safety latch and attach the nozzle extension.
Cleaning Detergent Siphoning Tube
If you used the detergent siphoning tube, you must flush it
with clean water before stopping the engine.
• Place the detergent siphoning tube in a bucket full of
clean water.
• Slide the adjustable nozzle forward to the low pressure
position. Flush for 1-2 minutes.
• Shut off the engine.
IMPORTANT: Simply shutting OFF engine will not
release pressure in the system. When the engine has
shut down, squeeze the trigger on the gun to
relieve the pressure in the hose.
Nozzle Maintenance
If a nozzle becomes restricted or clogged with dirt or
foreign materials, a pulsing sensation caused by excessive
pump pressure may occur during use.
Immediately clean a clogged or partially restricted nozzle
with the kit included with your pressure washer by
following these instructions:
• Shut off the engine and turn off the water supply.
• Disengage the safety latch and pull the trigger on the
spray gun. Hold until all water is purged from the unit.
Engage the safety latch on the spray gun.
• Separate the nozzle extension from the spray gun.
• Twist nozzle to stream setting.
• Remove nozzle from the end of the nozzle extension
using a 2 mm or 5/64 allen wrench (included in Nozzle
Cleaning Kit) (Figure 18).
Nozzle
Figure 18 — Removing and Cleaning Nozzle.

Generac Portable Products 2,400 PSI High Pressure Washer
14
• Use the wire included in the kit or a small paper clip to
free the foreign materials clogging or restricting the
nozzle (Figure 18).
• Remove additional debris by back flushing water supply
through nozzle extension. Back flush between 30 to
60 seconds. Twist nozzle extension to stream pattern and
move nozzle from low to high pressure while flushing
(Figure 19).
• Reinstall nozzle into nozzle extension. Do Not
overtighten.
• Reconnect the water supply, turn ON the water, and
start the engine.
• Reconnect nozzle extension to spray gun.
• Test the pressure washer by operating with nozzle in the
high and the low pressure positions.
O-Ring Maintenance
Your pressure washer uses o-rings to keep hose and spray
gun connections tight and leak-free. Through the normal
operation of your unit, these o-rings may become worn or
damaged.
Provided with your pressure washer is an O–Ring
Maintenance Kit which includes replacement o-rings,
rubber washer and water inlet filter. Refer to the
instruction sheet provided in the kit to service your unit’s
o-rings. Note that not all of the parts in the kit will be used
on your unit.
To remove a worn or damaged o–ring:
• Use a small flathead screwdriver to get underneath the
o-ring and pry it off.
ENGINE MAINTENANCE
See the engine owner’s manual for instructions on how to
properly maintain the engine.
OIL CHANGE NOTE: It is necessary to tip your
pressure washer when changing engine oil. Avoid spilling oil
on pump when changing engine oil. Wipe up any spilled oil
promptly.
PREPARING THE UNIT
FOR STORAGE
Water should not remain in the unit for long periods of
time. Sediments or minerals can deposit on pump parts and
“freeze” pump action. If you do not plan to use the
pressure washer for more than 30 days, follow this
procedure:
1. Flush detergent siphoning tube by placing the filter into
a pail of clean water while running pressure washer in
low pressure mode (adjustable nozzle in the forward
position). Flush for one to two minutes.
2. Shut off the engine and let it cool, then remove all
hoses. Disconnect spark plug wire from spark plug.
3. Empty the pump of all pumped liquids by pulling the
recoil handle about 6 times. This should remove most
of the liquid in the pump.
NOTE: To protect the unit from freezing temperatures,
draw RV antifreeze (non-alcohol) into the pump by pouring
the solution into a 3-foot section of garden hose connected
to inlet adapter and pulling recoil handle twice.
4. Store unit in a clean, dry area.
STORING THE ENGINE
See the engine owner’s manual for instructions on how to
properly prepare the engine for storage.
Figure 19 — Backflushing the Nozzle

Generac Portable Products 2,400 PSI High Pressure Washer
15
TROUBLESHOOTING
Problem Cause Correction
Pump has following
problems: failure to produce
pressure, erratic pressure,
chattering, loss of pressure,
low water volume.
1. Nozzle in low pressure mode.
2. Water inlet is blocked.
3. Inadequate water supply.
4. Inlet hose is kinked or leaking.
5. Clogged inlet hose strainer.
6. Water supply is over 140°F.
7. High pressure hose is blocked or
leaks.
8. Gun leaks.
9. Nozzle is obstructed.
10. Pump is faulty.
1. Pull nozzle backward for high
pressure mode.
2. Clear inlet.
3. Provide adequate water flow.
4. Straighten inlet hose, patch leak.
5. Check and clean inlet hose strainer.
6. Provide cooler water supply.
7. Clear blocks in outlet hose.
8. Replace gun.
9. Clean nozzle.
10. Contact Generac service facility.
Detergent fails to mix with
spray.
1. Detergent siphoning tube is not
submerged.
2. Chemical filter is clogged.
3. Nozzle is in high pressure mode.
1. Insert detergent siphoning tube into
detergent.
2. Clean or replace filter/detergent
siphoning tube.
3. Push nozzle forward for low
pressure mode.
Engine runs good at no-load
but “bogs” when load is
added.
Engine speed is too slow. Move throttle control to FAST position.
If engine still “bogs down”, contact Briggs
service facility.
Engine will not start; or
starts and runs rough.
1. Low oil level.
2. Dirty air cleaner.
3. Out of gasoline.
4. Stale gasoline.
5. Spark plug wire not connected to
spark plug.
6. Bad spark plug.
7. Water in gasoline.
8. Overchoking.
9. Excessively rich fuel mixture.
10. Intake valve stuck open or closed.
11. Engine has lost compression.
1. Fill crankcase to proper level.
2. Clean or replace air cleaner.
3. Fill fuel tank.
4. Drain gas tank; fill with fresh fuel.
5. Connect wire to spark plug.
6. Replace spark plug.
7. Drain gas tank; fill with fresh fuel.
8. Open choke fully and crank engine.
9. Contact Briggs service facility.
10. Contact Briggs service facility.
11. Contact Briggs service facility.
Engine shuts down during
operation.
1. Out of gasoline.
2. Low oil level.
1. Fill fuel tank.
2. Fill crankcase to proper level.
Engine lacks power. Dirty air filter. Replace air filter.
Engine “hunts” or falters. Choke is opened too soon. Move choke to halfway position until
engine runs smoothly.

Generac Portable Products 2,400 PSI High Pressure Washer
16
EXPLODED VIEW — UNIT

Generac Portable Products 2,400 PSI High Pressure Washer
17
PARTS LIST — UNIT
Item Part # Qty. Description
1 NSP 1 ENGINE
2 B1460 1 CAP, Vinyl Black
3 AB5737 1 BASE, Powder Coat Red
4 20566 1 DECAL, 1-800 Number
5 30809 1 GROMMET, Chem Hose
6 B5744 1 DECAL, Logo 2400 PSI
7 B1631B 1 BILLBOARD, Plastic
8 B1932 1 DECAL, Instructions
9 B4966 2 WHEEL, 3 X 10"
10 75402C 2 PUSHNUT, 5/8"
11 97178 2 KNOB, PW Handle
12 AB1945 1 HANDLE, Powder Coat Red
13 31669 1 BOLT, 1/4"-20 X 1.75" Carriage
14 B1730 1 BOLT, Eye
15 B5642 1 HOSE, 1/4" X 25'
16 B5830 1 KIT, O-Ring Maintenance
17 B3263 1 GUN, High Pressure
18 B1953A 1 WIREFORM
19 BB3061B 1 OIL, 20oz
20 B5740 1 MANUAL, Owners
21 B5765 1 MANUAL, B & S Engine
22 B2163 1 KIT, Nozzle Cleaning
23 B3335 1 WAND, Adjustable Nozzle
24 97566 1 HANG TAG, Nozzle
25 A1041 1 FILTER, Chemical Hose
26 21761 1 NOZZLE, 1.05 Yellow Rplcemt
27 75246 3 TAPTITE, 3/8" - 16 x 1-1/4"
28 23707 4 SHCS, 5/16" - 24 x 1"
29 48031G 1 CLAMP, Hose
30 B4925A 1 PUMP, Assembly
31 A1040B 1 HOSE, Chemical
33 B2218 1 O-RING, 1.625" ID x .103"
34 21424 1 CONNECTOR, Garden Hose
36 87815 1 GLASSES, Safety
37 97837 1 O-RING, Hi-Pressure
38 B1214 2 HHCS, M8 X 1.25 X 45
39 50190 2 WASHER, Flat, .34" x 1"
40 27007 2 MOUNT, Rubber Foot
41 52858 2 NUT, M8 Locking Flange
42 B4224 1 SCREEN, Gun Inlet
43 92479 4 WASHER, M8 Conical Ribbed

Generac Portable Products 2,400 PSI High Pressure Washer
18
EXPLODED VIEW — PUMP

Generac Portable Products 2,400 PSI High Pressure Washer
19
PARTS LIST — PUMP
Item Part # Qty. Description
1 B2218 1 O-RING, 1.625 ID x .103
2 97962 3 SHCS, M6 - 1 x 25
3 B5710 1 VALVE, 1/8 npt 1-5 PSI
4 97835 1 O-RING, Housing Seal
5 21783 1 THERMAL RELIEF, GPW-
EG
6 93680 3 SEAL, Oil Piston
7 97831 3 SPACER, Pilot
8 B2702 1 HOUSING, Piston
9 B4813 1 ADAPTER, Engine
10 97841 3 CAP, Outlet Check Valve
11 40946 4 SHCS, M6-1.0 x 35
12 185710 0 KIT, AXIAL CAM
1 . . . . . . 1 O-RING, Engine Seal
2 . . . . . . 3 SHCS, M6 - 1 x 25
4 . . . . . . 1 O-RING, Housing Seal
13 . . . . . . 1 WASHER, Brg. 36 x 65 x 6Thk
14 . . . . . . 2 ASSY., Brg. Cage 45 x 65
15 . . . . . . 3 WASHER, Brg. 45 x 65 x 1
16 . . . . . . 1 CAM, Axial 5.6 7/8"SAE
17 185287 0 KIT, CHEM INJECT
18 . . . . . . 1 FITTING, Chem Inject
19 . . . . . . 1 BALL, Chem Inject
20 . . . . . . 1 SPRING, Chem Inject
21 . . . . . . 1 O-RING, Venturi & Seat, Black
22 . . . . . . 1 VENTURI, Chem Inject
28 . . . . . . 1 O-RING, Venturi, Yellow
23 185711 0 KIT, UNLOADER 2300
21 . . . . . . 1 O-RING, Venturi & Seat, Black
24 . . . . . . 1 CAP, Unloader
25 . . . . . . 1 O-RING, Unloader Cap
26 . . . . . . 1 SPRING, Unloader
27 . . . . . . 1 PISTON, Unloader
29 . . . . . . 1 SEAT, Unloader
Item Part # Qty. Description
31 185712 0 KIT, CHECK VALVES
11 . . . . . . 4 SHCS, M6-1.0 x 35
32 . . . . . . 3 O-RING, Check Valve
33 . . . . . . 6 ASSY., Check Valve
45 . . . . . . 3 O-RING, Check Valve, White
34 185531 0 KIT, HEAD BRASS EG
11 . . . . . . 4 SHCS, M6-1.0 x 35
35 . . . . . . 1 HEAD, Pump
36 . . . . . . 1 PLUG, 1/8-28
46 . . . . . . 4 WASHER, M6 Flat
37 185713 0 KIT, PISTON & SPRING
1 . . . . . . 1 O-RING, Engine Seal
2 . . . . . . 3 SHCS, M6 - 1 x 25
4 . . . . . . 1 O-RING, Housing Seal
38 . . . . . . 3 RETAINER, Piston Spring
39 . . . . . . 3 PISTON, Dia. 15 x 65
40 . . . . . . 3 SPRING, Piston Return
41 185714 0 KIT, O-RING/SEAL 2300
1 . . . . . . 1 O-RING, Engine Seal
2 . . . . . . 3 SHCS, M6 - 1 x 25
4 . . . . . . 1 O-RING, Housing Seal
6 . . . . . . 3 SEAL, Oil Piston
11 . . . . . . 4 SHCS, M6-1.0 x 35
21 . . . . . . 2 O-RING, Venturi & Seat, Black
25 . . . . . . 1 O-RING, Unloader Cap
28 . . . . . . 1 O-RING, Venturi, Yellow
32 . . . . . . 3 O-RING, Check Valve
42 . . . . . . 3 SEAL, Double-Lip
43 . . . . . . 1 O-RING, High Pressure Transfer
44 . . . . . . 3 O-RING, Outlet CV Cap
45 . . . . . . 3 O-RING, Check Valve, White
Item numbers 12, 17, 23, 31, 34, 37, and 41 are service kits
and include all parts shown within the box. Certain parts
may only be available as components of a kit.

LIMITED PRESSURE WASHER WARRANTY
GENERAC PORTABLE PRODUCTS (hereafter referred to as the COMPANY) warrants to the original retail purchaser the
pressure washer manufactured by the COMPANY to be free from defects in material and workmanship for the period(s)
set forth below from the date of original purchase. This warranty is not transferable. The term “original purchaser” means
the person for whom the pressure washer is originally purchased.
Warranty Schedules
Electric Power Washer 1 year (does not apply to commercial or rental applications)
CONSUMER* COMMERCIAL*
All Other Engine-driven Engine: Warranted solely by Warranted solely by
Engine Manufacturer Engine Manufacturer
Pump:1 year 90 days
* NOTE: For the purpose of this warranty, “consumer” use means personal residential household use by
original purchaser. “Commercial” use means all other uses, including rental, construction, commercial and
income producing purposes. Once a pressure washer has experienced commercial use, it shall thereafter be
considered a commercial use pressure washer for the purposes of this warranty.
During said warranty period, the COMPANY will, at its option, repair or replace any part which, upon examination by the
COMPANY or COMPANY-authorized dealers, is found to be defective under normal use and service**. All transportation
costs under warranty, including return to the factory if necessary, are to be borne by the purchaser and prepaid by the
purchaser.
** NORMAL WEAR: As with all mechanical devices, pressure washers need periodic parts service and
replacement to perform well. This warranty does not cover repair when normal use has exhausted the life
of a part or pressure washer pump.
This warranty does not include: Used products and demonstration equipment. Parts, such as GUNS, HOSES, NOZZLE
EXTENSIONS, NOZZLES or other wear items such as quick couplers, oil, gauges, belts, o-rings, filters, pump packing, etc.
Pumps which have been run without water supplied. Damage or malfunctions resulting from accidents, abuse, modifications,
alterations, or improper servicing. Freezing or chemical deterioration. Normal maintenance such as adjustments, fuel system
cleaning and obstruction (due to chemical, dirt, carbon or lime, etc.).
THIS WARRANTY IS IN PLACE OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, SPECIFICALLY,
THE COMPANY MAKES NO OTHER WARRANTIES AS TO MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE. THE DURATION OF ANY IMPLIED WARRANTIES WHICH CANNOT BE
DISCLAIMED IS LIMITED TO THE TIME PERIOD AS SPECIFIED IN THE EXPRESS WARRANTY. LIABILITY
FOR CONSEQUENTIAL, INCIDENTAL, OR SPECIAL DAMAGES UNDER ANY AND ALL WARRANTIES IS
EXCLUDED, EVEN IF SUCH DAMAGES ARE A DIRECT RESULT OF THE COMPANY'S NEGLIGENCE. THE
COMPANY ALSO DISCLAIMS ANY RESPONSIBILITY FOR INCIDENTAL OR CONSEQUENTIAL
DAMAGES, SUCH AS THE LOSS OF TIME OR THE USE OF THE POWER EQUIPMENT, OR ANY
COMMERCIAL LOSS DUE TO THE FAILURE OF THE EQUIPMENT. ANY IMPLIED WARRANTIES ARE
LIMITED TO THE DURATION OF THIS WRITTEN WARRANTY.
Some states do not allow limitations on how long an implied warranty lasts, or the exclusion or limitation of incidental or
consequential damages, so the above limitations or exclusions may not apply to you. This warranty gives you specific legal
rights and you may also have other rights, which vary from state to state.
For service, see your nearest COMPANY-authorized warranty service facility or call 1-877-544-0982. Warranty service can
be performed only by a COMPANY-authorized service facility. This warranty will not apply to service at any other facility.
At the time of requesting warranty service, evidence of original purchase date must be presented.
Generac Portable Products
Jefferson, Wisconsin U.S. A.