Generac Portable Products 2400PSI User manual

High Pressure Washer Owner’s Manual
2400PSI
Model No. 1440-0 (2,400 PSI High Pressure Washer) Manual No. B5740GS Revision 3 (03/21/2002)
Questions? Help is just a moment away!
Call: Generac Pressure Washer Helpline - 1-800-270-1408 M-F 8-5 CT
Web: www.generac-portables.com or www.briggsandstratton.com

Generac Portable Products 2,400 PSI High Pressure Washer
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TABLE OF CONTENTS
Safety Rules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Know Your Pressure Washer . . . . . . . . . . . . . . . . . . . . . . 4
Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10
Product Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-13
Storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Replacement Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . 16-19
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Last Page
EQUIPMENT
DESCRIPTION
Read this manual carefully and become familiar
with your pressure washer. Know its applications,
its limitations and any hazards involved.
Every effort has been made to ensure that information in
this manual is accurate and current. However, Generac
reserves the right to change, alter or otherwise improve the
product and this document at any time without prior notice.
SAFETY RULES
The safety alert symbol ( ) is used with a signal word
(DANGER, CAUTION, WARNING), a pictorial and/or a
safety message to alert you to hazards. DANGER
indicates a hazard which, if not avoided, will result in death
or serious injury. WARNING indicates a hazard which, if
not avoided, could result in death or serious injury.
CAUTION indicates a hazard which, if not avoided, might
result in minor or moderate injury. CAUTION, when
used without the alert symbol, indicates a situation that
could result in equipment damage. Follow safety messages
to avoid or reduce the risk of injury or death.
WHEN ADDING FUEL
• Turn pressure washer OFF and let it cool at least 2 minutes
before removing gas cap.
• Fill fuel tank outdoors.
• Do not overfill tank. Allow space for fuel expansion.
• Keep gasoline away from sparks, open flames, pilot lights, heat,
and other ignition sources.
• Do not light a cigarette or smoke.
WHEN OPERATING EQUIPMENT
• Do not tip engine or equipment at angle which causes
gasoline to spill.
• Do not spray flammable liquids.
WHEN TRANSPORTING OR REPAIRING EQUIPMENT
• Transport/repair with fuel tank EMPTY or with fuel shutoff
valve OFF.
WHEN STORING GASOLINE OR EQUIPMENT WITH
FUEL IN TANK
• Store away from furnaces, stoves, water heaters, clothes
dryers or other appliances that have pilot light or other
ignition source because they can ignite gasoline vapors.
Gasoline and its vapors are extremely
flammable and explosive.
Fire or explosion can cause severe burns or
death.
WARNING
• Never aim the spray gun at people, animals or plants.
• Do not allow CHILDREN to operate the pressure washer.
• Never repair high pressure hose. Replace it.
The high pressure stream of water that this
equipment produces can pierce skin and its
underlying tissues, leading to serious injury and
possible amputation.
WARNING
• Keep water spray away from electric wiring or fatal electric
shock may result.
Spray contact with electrical wiring can result in
electrocution.
WARNING
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. If you equip the muffler with a spark arrester,
it must be maintained in effective working order.
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 pressure washer ONLY outdoors.
• 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.
Running engine gives off carbon monoxide, an
odorless, colorless, poison gas.
Some chemicals or detergents may be harmful if
inhaled or ingested, causing severe nausea,
fainting or poisoning.
Breathing carbon monoxide will cause nausea,
fainting or death.
DANGER
• Do not touch hot surfaces.
• Allow equipment to cool before touching.
Running engines produce heat. Temperature of
muffler and nearby areas can reach or exceed
150°F (65°C).
Severe burns can occur on contact.
WARNING
• Keep spray nozzle between 8 to 24 inches away from cleaning
surface.
• Be extremely careful if you must use the pressure washer from
a ladder, scaffolding or any other relatively unstable location.
• The cleaning area should have adequate slopes and drainage to
reduce the possibility of a fall due to slippery surfaces.
• Operate this unit on a stable surface.
The high pressure spray could also cause you to
fall if you are too close to the cleaning surface.
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.
Use of pressure washer can create puddles and
slippery surfaces.
WARNING
• Do not tamper with governed speed.
• Do not operate the pressure washer above the rated pressure.
Excessively high or low operating speeds increase risk
of injury and damage to pressure washer.
CAUTION
• Do not point spray gun at glass when in the jet spray mode.
• Never aim the spray gun at plants.
High pressure spray may damage fragile items including
glass.
CAUTION
• Do not wear loose clothing, jewelry or anything that may be
caught in the starter or other rotating parts.
• Tie up long hair and remove jewelry.
Starter and other rotating parts can entangle
hands, hair, clothing, or accessories.
WARNING
WHEN ADJUSTING OR MAKING REPAIRS TO YOUR
PRESSURE WASHER
• Disconnect the spark plug wire from the spark plug and place
the wire where it cannot contact spark plug.
Unintentional sparking can result in fire or
electric shock.
WARNING
• 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.
WARNING

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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 125°-155°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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IMPORTANT: 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
- Owner’s Manual
- Engine Manual
- Spray Gun
- Nozzle Extension
- Oil Bottle
Owner’s Registration Card
- 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:
• Fill out and send in registration card.
• 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 the engine owners manual to add recommended
oil to engine.
NOTE: Check oil often during engine break–in. Refer to
engine owner’s manual for recommendations.
Add Gasoline
WARNING! 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
1.5" 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 3 — Attach Wire Form to Handle
Figure 4 — Typical Fuel Expansion Space
Fuel
Tank
1.5” Airspace

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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.
IMPORTANT: Do Not siphon standing water for the
water supply. Use ONLY cold water (less than 100°F).
• Connect the garden hose to the water inlet. Tighten by
hand (Figure 7).
CAUTION! 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
caution will not be covered by the warranty.
• Turn ON the water and squeeze the trigger on the spray
gun to purge the pump system 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 100°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.

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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.
To Start Your Pressure Washer
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.
• 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” for illustrations.
• 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.
• Squeeze trigger on gun until you have a steady stream of
water. This purges the pump of air and impurities.
• Attach nozzle extension to spray gun (Figure 8). Tighten
by hand.
• Position the nozzle in the low pressure mode (slide
nozzle forward) and squeeze the trigger on the spray gun
to relieve pressure caused by turning ON the water.
Water will flow out of the gun in a thin stream. Continue
to hold trigger until there is a steady stream of water
and no air remains in the system. Release the trigger.
• Engage the safety latch to the spray gun trigger
(Figure 9).
• Rotate the choke control to the “Choke” position
(Figure 10).
NOTE: For a warm engine, be sure the choke control is in
the “Run” position.
• Move the throttle lever to “Fast” position, shown here
as a rabbit (Figure 11).
• Place your left foot on the lower frame and grasp the
handle as shown (Figure 12). Your unit may appear
slightly different from that shown here.
Figure 11 — Throttle Lever
Figure 10 — Choke Positions
Figure 8 — Connect Nozzle Extension to Spray Gun
Figure 9 — Spray Gun with Safety Latch Engaged
Safety Latch
Figure 12 — Recommended Engine Starting Posture

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• Pull the starter grip handle lightly with your right hand
until you feel some resistance, then pull briskly.
• 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.
NOTE: If the recoil starter is hard to pull, it may be
necessary to squeeze the gun trigger to relieve internal
pump pressure.
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.
CAUTION! Never adjust spray pattern when
spraying. Never put hands in front of nozzle to
adjust spray pattern.
The adjustable nozzle affixed to the nozzle extension
permits you to adjust the spray pattern and the spray
pressure, as follows:
• Slide the nozzle forward to adjust the spray to low
pressure mode (Figure 13). Slide the nozzle backward to
achieve high pressure.
• Point the nozzle down towards a firm surface and press
the trigger to test the pattern (Figure 14).
• Twisting the nozzle adjusts the spray pattern from a
narrow pattern to a fan pattern (Figure 15).
Slide nozzle backward
for high pressure mode. Slide nozzle forward for
low pressure mode and
detergent application.
Figure 13 - Adjusting Spray Pressure
Figure 14 — Test the Spray Pattern
Twist nozzle
counterclockwise for fan
spray pattern.
Twist nozzle clockwise
for narrow spray
pattern.
Figure 15 - Adjusting Spray Pattern

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• 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 8 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.
• Slide the adjustable nozzle forward to low pressure
mode. Detergent cannot be applied with the nozzle in
high pressure position.
• 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.
• Apply the detergent to a dry surface, starting at lower
portion of area to be washed and work upward, using
long, even, overlapping strokes.
• Allow the detergent to “soak in” for 3-5 minutes before
washing and rinsing. Reapply as needed to prevent
surface from drying. Do Not allow the detergent to dry
on (prevents streaking).
IMPORTANT: You must flush the chemical injection
system after each use by placing the filter into a bucket of
clean water, then run the pressure washer in low pressure
for 1-2 minutes.
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 builds as
you climb in a running washer. 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 and press the
trigger. It will take a few seconds for the detergent to
clear.
NOTE: You can also stop detergent from flowing by
simply removing detergent siphon 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 rinsing.
• Start at the top of the area to be rinsed, working down
with same overlapping strokes as you used for cleaning.
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
125°–155°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.
Figure 16 — Insert Filter into Container.

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SPECIFICATIONS
Rated 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 100°F
Automatic Cool . . . . Will cycle when water
Down System . . . . . . . reaches 125°-155°F
Shipping Weight . . . . 76 lbs.
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
pressure washer as instructed in this manual.
• Some adjustments will need to be made periodically to
properly maintain your pressure washer. Check the spray
gun and adjustable nozzle extension assembly for wear.
• 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. 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 in-line filter for damage.
• Check high pressure hose for leaks.
• Check detergent siphoning tube and filter for damage.
• Check spray gun and adjustable nozzle extension
assembly for leaks.
• Rinse out garden hose to flush out debris before
connecting to pressure washer.
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.
CAUTION! 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.
Cleaning Detergent Siphoning Tube
If you used the detergent siphoning tube, you must flush it
with clean water before stopping the engine.
• Place the chemical injection siphon/filter in a bucket full
of clean water.
• Slide the adjustable nozzle extension forward to the low
pressure mode.
• 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 spray gun to
relieve the pressure in the hose.

Generac Portable Products 2,400 PSI High Pressure Washer
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Check Gun and Adjustable Nozzle
Extension
Examine the hose connection to the spray 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.
Check In-Line Filter
Refer to Figure 17 and service the in-line filter if it
becomes clogged, as follows:
1. Detach spray gun and nozzle extension from high
pressure hose. Detach nozzle extension from spray
gun and remove o-ring and screen from nozzle
extension. Flush the screen, spray 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.
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”. Connect the water supply
and turn water on.
• Pull the trigger on the spray 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”. Connect the water supply
and turn water on.
• Start the engine according to instructions in “To Start
Your Pressure Washer”.
• Remove nozzle extension from spray gun.
• Squeeze the trigger on the spray gun and hold.
• When the water supply is steady and constant, engage
the safety latch and attach the nozzle extension.
Nozzle Maintenance
A pulsing sensation felt while squeezing the spray gun
trigger may be caused by excessive pump pressure. The
principal cause of excessive pump pressure is a nozzle
clogged or restricted with foreign materials, such as dirt,
etc. To correct the problem, immediately clean the nozzle
using the tools included with your pressure washer and
follow these instructions:
1. Shut off the engine and turn off the water supply.
2. Detach the nozzle extension from the spray gun. Twist
the nozzle clockwise to the stream position. Using the
supplied 2mm (5/64) allen wrench, remove the nozzle
from the end of the nozzle extension (Figure 18).
3. Remove the in-line filter from the other end of the
nozzle extension.
4. Use the wire included in the kit (or a small paper clip)
to free any foreign material clogging or restricting the
nozzle (Figure 18).
5. Using a garden hose, remove additional debris by back
flushing water through the nozzle extension
(Figure 19). Back flush between 30 to 60 seconds. Turn
the adjustable nozzle extension to stream spray and
move the nozzle from low to high while flushing.
Nozzle Extension
Filter Screen
O-ring
Nozzle
Figure 18 — Removing and Cleaning Nozzle.
Figure 17 — Clean In-Line Filter

Generac Portable Products 2,400 PSI High Pressure Washer
13
6. Reinstall the nozzle and in-line filter into the nozzle
extension. Do Not overtighten the nozzle with the
allen wrench.
7. Reconnect the nozzle extension to the spray gun.
8. Reconnect the water supply, turn on the water, and
start the engine.
9. Test the pressure washer by operating with nozzle in
the high and in the low positions.
O–Ring Maintenance
Through the normal operation of your pressure washer,
o–rings, which keep the connections of the hoses and spray
gun tight and leak–free, may become worn or damaged.
An O-Ring Maintenance Kit is provided with your pressure
washer 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.
CAUTION! Avoid prolonged or repeated skin
contact with used motor oil. Used motor oil has
been shown to cause skin cancer in certain
laboratory animals. Thoroughly wash exposed areas
with soap and water.
KEEP OUT OF REACH OF CHILDREN. DON'T
POLLUTE. CONSERVE RESOURCES. RETURN
USED OIL TO COLLECTION CENTERS.
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 high
pressure and garden 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.
4. Use Generac brand PumpSaver to prevent corrosion
build up and freezing of pump.
5. Store unit in a clean, dry area.
Protecting the Pump
To protect the pump from damage caused by mineral
deposits or freezing, use the Generac PumpSaver to treat
pump. This prevents freeze damage and lubricates pistons
and seals.
NOTE: Generac PumpSaver is available as an optional
accessory. It is not included with the pressure washer.
CAUTION! You must protect your unit from freezing
temperatures. Failure to do so will permanently damage
your pump and render your unit inoperable. Freeze damage
is not covered under warranty.
CAUTION! Read and follow all cautions and
warnings on the PumpSaver can label. Always wear
eye protection when using PumpSaver.
To use PumpSaver, make sure the pressure washer is
turned off and disconnected from supply water. Read and
follow all instructions and warnings given on the PumpSaver
container.
NOTE: PumpSaver will drip from pump after treatment
and will stain wood and concrete.
NOTE: If PumpSaver is not available, 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.
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
14
NOTES

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 100°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. Dirty in-line filter.
3. Chemical filter is clogged.
4. Nozzle is in high pressure mode.
1. Insert detergent siphoning tube into
detergent.
2. See “Check In-Line Filter” on page 12.
3. Clean or replace filter/detergent
siphoning tube.
4. 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 &
Stratton 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.
Out of gasoline.
Fill fuel tank.
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 B1460GS 1 CAP, Vinyl Black
3 AB5737GS 1 BASE, Powder Coat Red
4 20566GS 1 DECAL, 1-800 Number
5 30809GS 1 GROMMET, Chem Hose
7 191050GS 1 BILLBOARD, Assembly, 01440
9 B4966GS 2 WHEEL
10 190147GS 2 PUSHNUT
11 97178GS 2 KNOB, PW Handle
12 AB1945GS 1 HANDLE, Powder Coat Red
13 31669GS 1 BOLT, Carriage
14 B1730GS 1 BOLT, Eye
15 B5642GS 1 HOSE
16 190862GS 1 KIT, Maintenance
17 B3263GS 1 GUN, High Pressure
18 B1953AGS 1 WIREFORM
19 BB3061BGS 1 OIL, 20oz
20 B5740GS 1 MANUAL, Owners
21 B5765GS 1 MANUAL, B & S Engine
23 B3335GS 1 WAND, Adjustable Nozzle
24 97566GS 1 HANG TAG, Nozzle
25 A1041GS 1 FILTER, Chemical Hose
26 21761GS 1 NOZZLE, Yellow Rplcemt
27 75246GS 3 TAPTITE
28 23707GS 4 CAPSCREW, Socket Head
29 48031GGS 1 CLAMP, Hose
30 B4925AGS 1 PUMP, Assembly (see pages 18-19)
31 A1040BGS 1 HOSE, Chemical
33 B2218GS 1 O-RING
34 21424GS 1 CONNECTOR, Garden Hose
36 87815GS 1 GLASSES, Safety
37 97837GS 1 O-RING, Hi-Pressure
38 188194GS 2 RIVET, Blind
39 71693GS 2 WASHER, Fender
40 27007GS 2 MOUNT, Rubber Foot
42 B4224GS 1 SCREEN, Gun Inlet
43 92479GS 4 WASHER, Conical Ribbed
44 48031BGS 1 CLAMP, Hose Band
45 187952GS 1 DECAL, Cool Down

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 B2218GS 1 O-RING
2 97962GS 3 CAPSCREW, Socket Head
3 B5710GS 1 VALVE, 1-5 PSI
4 97835GS 1 O-RING, Housing Seal
5 21783GS 1 THERMAL RELIEF, GPW-
EG
6 93680GS 3 SEAL, Oil Piston
7 97831GS 3 SPACER, Pilot
8 B2702GS 1 HOUSING, Piston
9 B4813GS 1 ADAPTER, Engine
10 97841GS 3 CAP, Outlet Check Valve
11 40946GS 4 CAPSCREW, Socket Head
12 185710GS 0 KIT, AXIAL CAM
1 . . . . . . 1 O-RING, Engine Seal
2 . . . . . . 3 CAPSCREW, Socket Head
4 . . . . . . 1 O-RING, Housing Seal
13 . . . . . . 1 WASHER, Brg.
14 . . . . . . 2 ASSY., Brg. Cage
15 . . . . . . 3 WASHER, Brg.
16 . . . . . . 1 CAM, Axial
17 185287GS 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 187879GS 0 KIT, UNLOADER
21 . . . . . . 1 O-RING, Venturi & Seat, Black
24 . . . . . . 1 CAP, Unloader
25 . . . . . . 1 O-RING, Unloader Cap
26 . . . . . . 1 SPRING, Unloader
27 . . . . . . 1 PISTON ASSY., Unloader
29 . . . . . . 1 SEAT, Unloader
Item Part # Qty.Description
31 185712GS 0 KIT, CHECK VALVES
11 . . . . . . 4 CAPSCREW, Socket Head
32 . . . . . . 3 O-RING, Check Valve
33 . . . . . . 6 ASSY., Check Valve
45 . . . . . . 3 O-RING, Check Valve, White
34 185531GS 0 KIT, HEAD BRASS EG
11 . . . . . . 4 CAPSCREW, Socket Head
35 . . . . . . 1 HEAD, Pump
36 . . . . . . 1 PLUG
46 . . . . . . 4 WASHER, Flat
37 185713GS 0 KIT, PISTON & SPRING
1 . . . . . . 1 O-RING, Engine Seal
2 . . . . . . 3 CAPSCREW, Socket Head
4 . . . . . . 1 O-RING, Housing Seal
38 . . . . . . 3 RETAINER, Piston Spring
39 . . . . . . 3 PISTON
40 . . . . . . 3 SPRING, Piston Return
41 185714GS 0 KIT, O-RING/SEAL 2300
1 . . . . . . 1 O-RING, Engine Seal
2 . . . . . . 3 CAPSCREW, Socket Head
4 . . . . . . 1 O-RING, Housing Seal
6 . . . . . . 3 SEAL, Oil Piston
11 . . . . . . 4 CAPSCREW, Socket Head
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 WARRANTY
GENERAC PORTABLE PRODUCTS OWNER WARRANTY POLICY Effective October 1, 2001
WARRANTY PERIOD*
* The warranty period begins on the date of purchase by the first retail consumer or commercial end user, and continues for the period of time
stated in the table above. "Consumer use" means personal residential household use by a retail consumer. "Commercial use" means all other
uses, including use for commercial, income producing or rental purposes. Once equipment has been used commercially, it shall thereafter be
considered to be in commercial use for purposes of this warranty. Used equipment, demonstration equipment and equipment used for prime
power in place of a utility are not warranted. Accessory parts such as guns, hoses, wands and nozzles are excluded from the product warranty.
** The gasoline engine and starting batteries are warranted solely by the manufacturers of those products.
WARRANTY REGISTRATION IS NOT NECESSARY TO OBTAIN WARRANTY ON GENERAC PORTABLE PRODUCTS
EQUIPMENT. SAVE YOUR PROOF OF PURCHASE RECEIPT. IF YOU DO NOT PROVIDE PROOF OF THE INITIAL
PURCHASE DATE AT THE TIME WARRANTY SERVICE IS REQUESTED, THE MANUFACTURING DATE OF THE
EQUIPMENT WILL BE USED TO DETERMINE THE WARRANTY PERIOD.
About your equipment warranty:
Generac Portable Products welcomes warranty repair and apologizes to you for being inconvenienced. Any Authorized Service Dealer may perform
warranty repairs. Most warranty repairs are handled routinely, but sometimes requests for warranty service may not be appropriate. For example,
warranty would not apply if equipment damage occurred because of misuse, lack of routine maintenance, shipping, handling, warehousing or
improper installation. Similarly, warranty is void if the serial number of the equipment has been removed or the equipment has been altered or
modified.
If a customer differs with the decision of the Service Dealer, an investigation will be made to determine whether the warranty applies. Ask the
Service Dealer to submit all supporting facts to its Distributor for review. If the Distributor decides that the claim is justified, the customer will
be fully reimbursed for those items that are defective. To avoid misunderstandings that might occur between the customer and the Dealer, listed
below are some of the causes of equipment failure that the warranty does not cover:
Normal wear:
Outdoor Power Equipment, like all mechanical devices, needs 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 the equipment.
Installation and Maintenance:
This warranty does not apply to equipment or parts that have been subjected to improper or unauthorized installation or alteration,
misuse, negligence, accident, overloading, overspeeding, improper maintenance, repair or storage so as, in Generac Portable Products'
judgment, to adversely affect its performance and reliability. This warranty also does not cover normal maintenance such as adjustments,
fuel system cleaning and obstruction (due to chemical, dirt, carbon or lime, etc.).
Other Exclusions:
Also excluded from this warranty are wear items such as quick couplers, oil gauges, belts, o-rings, filters, pump packing, etc., pumps
which have been run without water supplied or damage or malfunctions resulting from accidents, abuse, modifications, alterations, or
improper servicing or freezing or chemical deterioration.
Warranty is available only through service dealers authorized by Generac Portable Products. This warranty does not apply to
service by any other entity.
You may locate your nearest Authorized Generac Portable Product Service Dealer in our dealer locator map at
www.generac-portables.com or call 1-877-544-0982.
Generac Portable Products, LLC
Jefferson, Wisconsin U.S.A.
LIMITED WARRANTY
"Generac Portable Products, LLC will repair or replace, free of charge, any part, or parts of the equipment that are defective in material or
workmanship or both. Transportation charges on parts submitted for repair or replacement under this Warranty must be borne by purchaser.
This warranty is effective for the time periods and subject to the conditions provided for in this policy. For warranty service, find the nearest
Authorized Service Dealer in our dealer locator map at www.generac-portables.com or call 1-877-544-0982. THERE IS NO OTHER EXPRESS
WARRANTY. IMPLIED WARRANTIES, INCLUDING THOSE OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE
LIMITED TO THE TIME PERIOD SPECIFIED, OR TO THE EXTENT PERMITTED BY LAW ANY AND ALL IMPLIED WARRANTIES ARE
EXCLUDED. LIABILITY FOR CONSEQUENTIAL DAMAGES UNDER ANY AND ALL WARRANTIES ARE EXCLUDED TO THE EXTENT
EXCLUSION IS PERMITTED BY LAW. Some states do not allow limitations on how long an implied warranty lasts, and some states do not
allow the exclusion or limitation of incidental or consequential damages, so the above limitation and exclusion 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 and country to country."
PRODUCTS** CONSUMER USE COMMERCIAL USE
Portable Generator 1 year 90 days
(Side Valve Engine Powered)
Portable Generator 2 years 1 year
(Overhead Valve Engine Powered) (2nd year parts only)
Electric Powered Pressure Washer 1 year None
Gasoline Powered Pressure Washer 1 year 90 days
Generac Portable Products Are Made Under One Or More Of The Following Patents: (Other Patents Pending)
5902094 5823752 5718255 5890413