Page 1
3000PSI
The Reliable Ones
High Pressure Washer
Owner’s Manual
Problems?
Questions?
Before taking your unit
back to the store,
call the pressure washer
helpline at
1-800-270-1408
M-F 8-5 CST
This pressure
washer is
equipped with an
Automatic Cool
Down System.
See page 11 for
details.
GENERAC
This symbol points out important safety instructions, which, if not followed, could endanger the personal safety and/or property of yourself and others. Read and follow all
instructions in the manual before attempting to operate this unit.
Model No. 11240 (3000 PSI High Pressure Washer) Manual No. B2128 Revision 0 (2/27/98)
Page 2
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High Pressure Washer
Generac 3000PSI High Pressure Washer
CAUTION: Always disconnect spark plug wire and place wire where it cannot contact spark
plug to prevent accidental starting when setting up, transporting, adjusting or making repairs
to your high pressure washer.
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.
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.
Locate this pressure washer in areas away from combustible
materials, combustible fumes or dust.
The high pressure equipment is designed to be used with Gen-
erac 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.
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.
Units with broken or missing parts, or without protective housing
or covers should NEVER be operated.
The muffler and air cleaner must be installed and in good condi-
tion before operating the Pressure Washer. These components
act as spark arrestors if the engine backfires.
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.
Never aim the gun at people, animals or plants.
High pressure spray can cause paint chips or other particles to
become airborne and fly at high speeds.
The high pressure stream of water that this equipment produces
can pierce skin and its underlying tissues, leading to serious
injury and possible amputation.
Always wear eye protection when you use this equipment or
when you are in the vicinity where the equipment is in use.
Never move the machine by pulling on the high pressure hose.
Use the handle provided on the top of the unit.
Always be certain the spray gun, nozzles and accessories are cor-
rectly attached.
Never use a spray gun which does not have a trigger lock or trig-
ger guard in place and in working order.
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.
High pressure spray may damage fragile items including glass.
Do not point spray gun at glass when in the high pressure spray
mode.
Keep the hose connected to machine and the spray gun while
the system is pressurized. Disconnecting the hose while the unit
is pressurized is dangerous.
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 secure trigger gun in the pull-back (open) position.
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 muf-
fler or engine or you could be severely burned.
Operate and store this unit on a stable surface.
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.
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 move-
ment of couplings. If any of these conditions exist, replace hose
immediately. Never repair high pressure hose. Replace it with
another hose that meets minimum pressure rating of your pres-
sure washer.
The engine exhaust from this product
contains chemicals known to the State
of California to cause cancer, birth
defects, or other reproductive harm.
WWAARRNNIINNGG::
GENERAC
The Reliable Ones
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Generac 3000PSI High Pressure Washer
3
High Pressure Washer
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.
Should you experience any problem you cannot
easily remedy, please contact your nearest GENERAC Authorized Service facility, or call the 1-800
number listed on the front of this manual. We have
competent, well-trained technicians and the proper
tools to service or repair this unit.
Please read and retain this manual. The instructions
will enable you to assemble and maintain your high
pressure washer properly.
CUSTOMER
RESPONSIBILITIES
Read and observe the safety rules.
Follow regular schedule in maintaining, caring for
and using your high pressure washer.
Follow the instructions under CUSTOMER
RESPONSIBILITIES and STORAGE sections of
this Owner's Manual.
PRODUCT SPECIFICATIONS
Pressure Washer Specifications
Outlet Pressure . . . . 3000 psi
Flow Rate . . . . . . . . . 3.0 gallons per minute (gpm)
Detergent Mix . . . . . . Use undiluted detergent
approved for pressure
washers
Water Supply . . . . . . Not to Exceed 140°F
Temperature
Automatic Cool . . . . Will cycle when water
Down System reaches 140°-145°F
Engine specifications
Engine Model . . . . . . Briggs Vanguard
Rated Horsepower . . 9.0
Displacement . . . . . . 296cc
Spark Plug
Type . . . . . . . . Champion RC12YC
Set Gap To: . . 0.030 inch (0.76mm)
Gasoline Capacity . . 6.4 quarts
Oil . . . . . . . . . . . . . . . SAE 30
In the State of California a spark arrestor 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: The spark arrestor must be maintained in
effective working order by the owner/operator.
You can order a replacement spark arrestor through
your authorized Generac service facility. See Engine
Owners Manual for part number.
Model Number 1124-0
Serial Number
Date of Purchase
The model and serial numbers will be found on a
decal attached to the pressure washer. You should
record both serial number and date of purchase and
keep in a safe place for future reference.
GENERAC
The Reliable Ones
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4
High Pressure Washer
KNOW YOUR PRESSURE WASHER
Read this owners manual and safety rules before operating your high pressure washer. Com-
pare the illustrations with your high pressure washer to familiarize yourself with the locations of various controls
and adjustments. Save this manual for future reference.
Generac 3000PSI High Pressure Washer
Pump Develops high pressure.
Recoil Starter Used for starting the engine manu-
ally.
Spray Gun Controls the application of water and
chemical onto cleaning surface with trigger device.
Includes safety latch.
High/Low Pressure Handle The handle allows you
to select the high pressure spray or the chemical spray.
Dual Element Air Cleaner Uses a dry type filter
element and foam pre-cleaner to limit the amount of
dirt and dust that gets in the engine.
Choke Used when starting a cold engine.
Water Inlet Connection for garden hose.
Dual Lance Must be connected to the spray gun.
Spark Arrestor Muffler Exhaust muffler lowers
engine noise and is equipped with a spark arrestor
screen, a USDA mandate for engine use in national
forests and parks.
High Pressure Outlet Connection for high pressure
hose.
High Pressure Hose Connect one end to water
pump and the other end to spray gun.
Goggles Always use the enclosed goggles or other
eye protection when running your pressure washer.
Automatic Cool Down System Cycles water
through pump when water reaches 140°-145°F. Warm
water will discharge from pump onto base of unit.
This system prevents internal pump damage.
Pressure Control Knob Rotated to switch between-
high and low pressure. Low pressure must be used
when applying detergent.
High/Low Pressure
Handle
Gas Tank
Dual Lance
Choke
Spray Gun
Water Inlet
Pump equipped with
Automatic Cool Down System
High Pressure Outlet
High Pressure Hose
Pressure Control
Knob
Spark Arrestor
Muffler
Dual Element
Air Cleaner
Recoil Starter
Goggles
GENERAC
The Reliable Ones
Page 5
High Pressure Washer
5
Read the entire owners manual before you attempt to
assemble or operate your new pressure washer.
Your new pressure washer has been assembled at
the factory with the exception of those parts left
unassembled for shipping purposes.
REMOVE PRESSURE
WASHER FROM CARTON
Remove the parts box, packing material, and
handle included with the pressure washer.
Slice two corners at the engine starter recoil end of
the carton from top to bottom so the panel can be
folded down flat, then remove all packing material.
Roll the pressure washer out of the carton
CARTON CONTENTS
Items in the carton include:
Main Unit
Manual Bag
Owners Manual
Pump Manual
Engine Owners Manual
Handle
Parts Box (which includes the following):
Goggles
Spray Gun
Dual Lance
High Pressure Hose
Nozzle Cleaning Kit
Handle Parts Bag (which includes the following):
4 carriage bolts
2 carriage (J) hooks
2 carriage hook caps
6 hex nuts
If any of the above parts are missing or damaged, call
the Pressure Washer Helpline at 1-800-270-1408.
PREPARING THE 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 attach the carriage hooks
that holds the spray gun and chemical bottle.
Connect the high pressure hose to the spray gun
and the pump and connect water supply to the
pump.
Add oil to engine crankcase.
Add fuel to fuel tank.
Attach the Handle
Place the bottom of the handle into the openings in
the base unit making sure the holes in the handle
align with the holes in the base (Figure 1).
Generac 3000PSI High Pressure Washer
AA
SSSSEEMMBBLL
YY
Figure 1 — Attach the handle to the base.
Make sure the
holes on the
handle are
aligned with the
holes in the
base.
Handle
Base
Carriage Hooks
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The Reliable Ones
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Generac 3000PSI High Pressure Washer
AASSSSEEMMBBLLYY
6
High Pressure Washer
Insert the carriage bolts from the outside through
the holes in the baseplate and through the handle
and attach the hex nuts on the inside. Tighten them
with a 1/2 wrench.
Insert the J hooks in the holes in the handle located on
both sides of the unit and affix them with the remaining
hex nuts. Tighten them with a 1/2 wrench.
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.
Note: When adding oil to the engine crankcase, use
only high quality detergent oil rated with API service
classification SE, SF,or SG rated SAE 30 weight.
Select the oils viscosity grade according to your
expected operating temperature. DO NOT Use SAE
10W40 Oil.
Although multi-viscosity oils (5W30, 10W30, etc.)
improve starting in cold weather, these multi-viscosity
oils will result in increased oil consumption when used
above 32°F. Check your engine oil level more
frequently to avoid possible damage from running
low on oil.
Place pressure washer on a level surface.
Clean area around oil fill and remove black oil fill
cap (Figure 2).
Pour oil into the oil fill opening until it reaches the
top. DO NOT OVERFILL. Check often when filling.
Install black oil cap, hand tighten securely.
Note: Check Oil Often During Engine Breakin.
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. Fill tank to about 1/2" below the
bottom of the filler neck to provide space
for fuel expansion. Wipe away any fuel
spillage from the engine and equipment
before starting.
The manufacturer recommends fresh, clean unleaded
automotive gasoline.
Use clean fuel and store in approved, clean, cov-
ered 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
(Figure 3).
Add UNLEADED gasoline, slowly, to fuel tank.
Use a funnel to prevent spillage.
Install fuel cap and wipe up any spilled gasoline.
Figure 2 — Add oil to engine crankcase. Do not
attempt to start engine without
adding oil.
Figure 3 — Add gasoline to fuel tank.
Gas Cap
colder 32°F warmer
5W30 SAE 30
Black Oil Fill Cap
GENERAC
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Generac 3000PSI High Pressure Washer
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High Pressure Washer
Connect Hose and Water
Supply to Pump
IMPORTANT: You must connect the gun to the dual
lance and attach all hoses before you start the
engine. Starting the engine without all hoses connected and the water supplied will damage the pump.
Uncoil the high pressure hose and attach the end of
the hose with the quick connect to the base of the
spray gun (Figure 4). Tighten by hand.
Attach the other end of the high pressure hose to
the high pressure outlet on the pump (Figure 5).
Tighten by hand.
Before you connect your garden hose to the water
inlet, inspect the water inlet screen (see Figure 6).
Clean the screen if it contains debris or have it
replaced if damaged. Do not run the pressure
washer if the water inlet screen is damaged.
Connect the garden hose to water inlet. Tighten
firmly by hand (Figure 6).
Turn on the water (open valve completely).
Squeeze the trigger on the gun to purge the pump
system of air and impurities. Squeeze until a steady
stream appears.
Attach the dual lance to spray gun. Tighten by
hand (Figure 7).
Warning: Before starting the pressure
washer, be sure you are wearing adequate eye protection.
Figure 5 — Connect high pressure hose to
pump.
Figure 4 — Connect high pressure hose
to spray gun.
Figure 6 — Connect garden hose to water inlet
and turn ON water.
Connect High Pressure
Hose Here
Figure 7 — Connect dual lance to spray gun.
GENERAC
The Reliable Ones
Page 8
USING THE NOZZLES
The chemical nozzle, which is permanently affixed to
your dual lance and has a spray pattern of 25
degrees, must be used when applying chemical. The
other nozzle attached to the lance has a 15 degree
spray pattern and is used when rinsing. There are
four accessory nozzles that may be purchased that
are used when rinsing. Each has a different spray
pattern, as indicated in the following illustration
(Figure 8).Please note that if you choose to purchase
these nozzles, you must also buy a quick connect
adaptor.
In order to change the accessory nozzle being used,
simply pull back the collar on the quick connect and
pull the current nozzle off. To put one on, pull back
the collar, insert the new nozzle and release the
collar, making sure it becomes flush with the end of
the quick connect. This procedure is only used when
utilizing the accessory nozzles that may be purchased.
CHECKLIST BEFORE
STARTING ENGINE
If you have reached this point, look back over the
assembly to see if you have performed all of the following.
Check for properly tightened hose connections
(high pressure and water supply) and for tight connections and that there are no kinks, cuts, or
damage to the high pressure hose, or garden hose.
Check that oil has been added to proper level in
engine crankcase before trying to start the pressure
washer.
Add proper gasoline to fuel tank.
Provide proper water supply (not to exceed 140°F).
Be sure to read Safety Rules and Operation sec-
tions before using the pressure washer.
Figure 8 — Spray patterns of nozzles
Generac 3000PSI High Pressure Washer
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High Pressure Washer
GENERAC
The Reliable Ones
Page 9
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.
You have assembled your high pressure washer and
have prepared the engine for starting. You are now
ready to clean your car, boat, the outside of a building
or whatever you plan to clean.
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. This starting information also applies
whenever you start the engine after you have let the
pressure washer sit idle for at least a day.
This pressure washer requires a water source that
flows at least 3.0 gallons per minute. Do not
attempt to siphon water from a non-pressurized
container. Place the pressure washer close
enough to an outside water source so that no more
than 50' of garden hose is needed.
Check that the high pressure hose is tightly con-
nected to the spray gun and to the pump. See
ASSEMBLY section for illustrations.
Connect the garden hose to water inlet on the
pressure washer pump and turn the water valve
on all the way.
IMPORTANT: Do not run the pump without the water
supply connected and turned on. You must follow this
caution or the pump will be damaged.
Turn fuel shut-off valve 1/4 turn to OPEN position.
Move choke control to CHOKE position.
Move throttle control to FAST position.
Push RUN/STOP switch to RUN position.
Note: For a warm engine, do not choke.
Squeeze the trigger on the spray gun to relieve
water pressure caused by turning on the water.
Water will spew out of the gun in a thin stream.
Continue to hold the trigger until you have a steady
stream of water and no air remains.This will make it
easier to pull start the engine. Release the trigger.
Apply the safety latch to the spray gun trigger
(Figure 9).
Grasp rope handle and pull slowly until you feel
some resistance. Then pull cord rapidly to overcome compression, prevent kickback and start the
engine. Let rope return to starter slowly. Repeat if
necessary with choke off and throttle control in
FAST. Operate engine with choke in RUN and
throttle in FAST position.
If after 3 pulls the engine fails to start, disengage the
spray gun safety latch, squeeze the trigger to relieve
water pressure, re-engage the spray gun safety latch
and pull the recoil starter handle rapidly (Max. 3
pulls).
How to Stop Your Pressure
Washer
Move throttle control to SLOW position.
Push RUN/STOP switch to STOP position.
Turn fuel shut-off valve 1/4 turn to CLOSED position..
Simply shutting off the engine will not release pres-
sure in the system. 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.
Generac 3000PSI High Pressure Washer
9
High Pressure Washer
Figure 9— Safety Latch.
Safety Latch On
GENERAC
The Reliable Ones
Page 10
Generac 3000PSI High Pressure Washer
10
High Pressure Washer
How to Use the Dual Lance and
Adjust Pressure
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 pressure and
apply detergent or any other cleaning chemicals.
IMPORTANT: You must attach all hoses and turn
on the water source fully before you start the engine.
Starting the engine without all the hoses connected
and without the water turned on will damage the
pump.
DANGER! Never put hands in front of
nozzle.
Located on the side of the pump is a pressure con-
trol knob. You can increase and decrease the
pressure of the spray by turning the knob clockwise
or counterclockwise respectively (Figure 10). The
unit has been set to maximum at the factory.
Point the nozzle in a safe direction and squeeze the
trigger to test the pressure. Be careful not to spray
your feet.
For most effective cleaning, keep the spray nozzle
between 8 to 24 inches away from cleaning surface.
If you get spray nozzle too close, especially using
high pressure, you may damage the cleaning surface.
Do not get closer than 8 inches when cleaning tires.
Applying Detergent
IMPORTANT: Use soaps designed specifically for
pressure washers. Household detergents could
damage the pump.
To apply detergent follow these steps:
Turn the valve on the dual lance to low pressure.
Prepare the detergent solution as required by the
job.
Hang the detergent solution on the J hook on the
handle.
Place the small filter end of the chemical injecting
tube into the detergent container .
IMPORTANT: Detergent cannot be applied without
the water source turned on.
Make sure garden hose is connected to water inlet.
Check that high pressure hose is connected to
spray gun and pump (see the ASSEMBLY section),
and start engine.
Apply the detergent to a dry surface, starting from
the bottom and working up to avoid streaking.
Allow the detergent to soak in for 3-5 minutes
before washing and rinsing. Reapply detergent to
prevent surface from drying.
For washing, start at lower portion of area to be
washed and work upward, using long, even, over-
lapping strokes.
CAUTION: Keep the plastic chemical
injecting tube from coming in contact with
the hot muffler. This will damage the plastic tube. When inserting the filter into a
cleaning agent bottle, route the tube so as
to keep it from inadvertently contacting the
hot muffler.
Figure 10 — Pressure control knob.
Pressure Control Knob
GENERAC
The Reliable Ones
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Generac 3000PSI High Pressure Washer
11
High Pressure Washer
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 force you to fall. The high pressure spray could also force you to fall if you
are too close to the cleaning surface.
For Rinsing:
Remove the chemical injector hose from the chemi-
cal bottle to stop detergent from flowing. Spray until
the detergent has cleared form the gun.
Keep the spray gun a safe distance from the area
you plan to spray.
Apply a high pressure spray to a small area and
then check the surface for damage. If no damage
is found, you can assume it is okay to continue
cleaning.
Start at top of 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 140145°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.
GENERAL MAINTENANCE
RECOMMENDATIONS
The warranty of the high pressure washer does not
cover items that have been subjected to operator
abuse or negligence. To receive full value from the
warranty, operator must maintain high pressure
washer as instructed in this manual.
Some adjustments will need to be made periodi-
cally to properly maintain your high pressure
washer.
All adjustments in the Service and Adjustments
section of the engine owners 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 dual lance 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.
BEFORE EACH USE
Check engine oil level.
Check water inlet screen for damage.
Check high pressure hose for leaks.
Check detergent inlet hose and filter for damage.
Check gun and dual lance assembly for leaks.
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The Reliable Ones
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Generac 3000PSI High Pressure Washer
12
High Pressure Washer
PRESSURE WASHER
MAINTENANCE
Check and Clean Inlet Screen
Examine screen on the water inlet. Clean if the
screen is clogged or replace if screen is damaged.
Check High Pressure Hose
High pressure hose can develop leaks from wear,
kinking, or abuse. Inspect 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 hose immediately.
DANGER: 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 meets
the maximum pressure rating of your
pressure washer.
Check Chemical Injecting Tube
Examine the filter on the chemical injecting tube and
clean if clogged. The tube should fit tightly on barbed
fitting. Examine the tube for leaks or tears. Replace
the filter or tube if either is damaged.
Check Gun and Dual lance
Examine hose connection to gun and make sure it is
secure. Test trigger by pressing it and making sure it
springs back into place when you release it. Put safety
latch in on position and test trigger. You should not be
able to press trigger.
Purge Pump of Air and
Contaminants
To remove the air from the pump, follow these
steps:
Set up the pressure washer as described in the
ASSEMBLY section and connect the water supply.
Remove the dual lance from the gun.
Squeeze the trigger on the gun and hold.
To remove any contaminants from the pump,
follow these steps:
Set up the pressure washer as described in the
ASSEMBLY section, and connect the water supply.
Remove the dual lance from the spray gun.
Start the engine according to instructions in OPER-
ATION section.
Squeeze the trigger on the spray gun and hold.
When the water supply is steady and constant,
engage the safety latch and refasten the dual lance.
Cleaning Chemical Injecting Tube
If you have used the chemical injecting tube you must
flush it with clean water before stopping the engine.
To clean the chemical injector hose:
Place the small filter end of the chemical injecting
tube in a bucket of clean water.
Open the chemical valve handle fully on the lance
by turning it counterclockwise. This puts the gun in
low pressure.
Squeeze the spray gun trigger for 1-2 minutes to
flush the chemical injector hose.
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.
Nozzle Maintenance
If the nozzle on the dual lance becomes restricted or
clogged with foreign materials, such as dirt, excessive
pump pressure may develop. If this nozzle becomes
partially clogged, it can cause a pulsing sensation
during use. This generally is not a pump related
problem, but rather a clogged or partially restricted
nozzle.
If the nozzle becomes clogged or partially restricted,
immediately clean the nozzle with the kit included
with your pressure washer by following these instructions:
Shut off the engine and turn off the water supply.
Press trigger to relieve pressure.
Separate the dual lance from the spray gun.
Use the wire included in the kit or a small paper
clip to free the foreign materials clogging or restrict-
ing the nozzle (Figure 11).
GENERAC
The Reliable Ones
Page 13
Figure 11 — Removing and cleaning nozzle.
Remove additional debris by back flushing the
water supply through the dual lance (Figure 12).
Back flush between 30 to 60 seconds. Back flush
both lances by turning chemical valve handle.
Figure 12 — Backflushing the nozzle.
Reconnect the dual lance to the spray gun.
Reconnect the water supply, turn on the water, and
start the engine.
Test the pressure washer by operating with the
nozzle in the high and low pressure positions.
ENGINE MAINTENANCE
See the engine Owners Manual for instructions on
how to properly maintain the engine.
SERVICE AND
ADJUSTMENTS
See the Engine Owners Manual for instructions on
how to properly service and adjust the engine
PREPARING THE UNIT FOR
STORAGE
Water should not remain in the unit for long periods of
time. Sediments of 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 the chemical injecting tube by placing the
injector filter into a pail of clean water while running
pressure washer and squeezing the spray gun trigger with the dual lance in low pressure mode.
Flush for 1-2 minutes.
2.Shut off the engine and let it cool, then remove all
hoses.
3.Place Run/Stop Switch in STOP position.
4.Empty the pump of all liquids by pulling recoil
handle about 6 times. This should remove most of
the liquid in the pump.
NOTE: To protect the unit from freezing temperatures, draw antifreeze fluid into pump by pouring
antifreeze fluid into a 3-foot section of garden hose
connected to the inlet adapter and pulling the recoil
handle twice. Use non-alcohol, RV antifreeze only.
5.Store in a clean, dry area.
STORING THE ENGINE
See the Engine Owners manual for instructions on
how to properly store the engine.
13
High Pressure Washer
Generac 3000PSI High Pressure Washer
GENERAC
The Reliable Ones
Page 14
NOTES
14
High Pressure Washer
Generac 3000PSI High Pressure Washer
GENERAC
The Reliable Ones
Page 15
NOTES
15
High Pressure Washer
Generac 3000PSI High Pressure Washer
GENERAC
The Reliable Ones
Page 16
TROUBLESHOOTING POINTS
Generac 3000PSI High Pressure Washer
16
High Pressure Washer
Problem Cause Correction
Pump has the following problems: 1. Lance is in low pressure mode. 1. Adjust chemical valve handle to
failure to produce pressure, erratic high pressure.
pressure, chattering, loss of pressure, 2. Water inlet is blocked. 2. Clear inlet.
low water volume. 3. Inadequate water supply. 3. Provide adequate water flow.
4. Garden hose is kinked or leaking. 4. Straighten garden hose, patch leak.
5. Inlet hose strainer is clogged. 5. Check and clean water inlet screen.
6. Water supply is over 140°F. 6. Provide cooler water supply.
7. Outlet hose is blocked or leaks. 7. Clear blocks in outlet hose.
8. Gun leaks. 8. Replace gun.
9. Nozzle is obstructed. 9. Clear nozzle.
10. Pump is faulty. 10. Contact Generac service facility.
Detergent fails to mix with spray. 1. Chemical injecting tube is not submerged. 1. Insert chemical injecting tube into
detergent.
2. Chemical injecting tube is clogged. 2. Clean or replace filter/chemical
injecting tube.
3. Chemical valve handle is in high. 3. Adjust chemical valve handle to
pressure mode low pressure mode.
4. Chemical concentration knob is closed. 4. Open chemical concentration knob.
Engine runs well when not spraying Engine speed is too slow. Contact Generac service facility.
but bogs down when the trigger is
squeezed.
GENERAC
The Reliable Ones
Page 17
TROUBLESHOOTING POINTS
17
High Pressure Washer
Generac 3000PSI High Pressure Washer
PROBLEM CAUSE CORRECTION
Engine will not start;,or starts 1. Low oil level. 1. Fill crankcase to proper level.
and runs rough. 2. Dirty air cleaner. 2. Clean or replace air cleaner.
3. Out of gasoline. 3. Fill fuel tank.
4. Stale gasoline. 4. Drain gas tank; fill with fresh fuel.
5. Spark plug wire not connected 5. Connect wire to spark plug.
to spark plug.
6. Bad spark plug. 6. Replace spark plug.
7. Water in gasoline. 7. Drain gas tank; fill with fresh fuel.
8. Excessively rich fuel mixture. 8. Contact Generac service facility.
9. Intake valve stuck open or closed. 9. Contact Generac service facility.
10. Engine has lost compression. 10. Contact Generac service facility.
Engine shuts down during operation. 1. Out of gasoline. 1. Fill fuel tank.
2. Low oil level. 2. Fill crankcase to proper level.
Engine lacks power. Dirty air filter. Replace air filter.
Engine hunts or falters. Engine not operating properly. Contact Generac service facility.
GENERAC
The Reliable Ones
Page 18
EXPLODED VIEW PRESSURE WASHER
Drawing No. B2129
Generac 3000PSI High Pressure Washer
18
High Pressure Washer
18
GENERAC
The Reliable Ones
Page 19
REPAIR PARTS PRESSURE WASHER
Drawing No. B1988
19
High Pressure Washer
Generac 3000PSI High Pressure Washer
Item Part # Qty. Description
1 B2124 1 ENGINE, B&S Vanguard 9 HP
2 A1040B 1 HOSE, Chemical, 4
3 A1041 1 FILTER, Chemical Hose
4 95320 1 INLET, Garden Hose
5 97098 1 CAP, Garden Hose Inlet
6 97100 1 CAP, H.P. Adaptor
7 B1554 1 VALVE, Thermal Relief
8 B2126 1 PUMP
9 B3040 4 HHCS, 5/16-24x1-1/8
10 22129 4 WASHER, Lock
11 63281 1 KEY, 1/4 Square x 2 Lg.
12 B1621 1 HOSE, 3000 PSI
13 B2508 1 KIT, Nozzle Cleaning
14 B2832 1 MANUAL, Engine
15 B2131 1 MANUAL, Pump
16 B2128 1 MANUAL
17 B2140D 1 LANCE, Dual 1.2mm Dia.
18 B2684 1 KIT, Handle Hardware
19 B2500 1 GUN
20 87815 1 GOGGLES
21 99583 4 NUT, Hex Flange 5/16-18
22 B2043 4 BOLT, 5/16-18 x 1-3/4 Carriage
23 B2330 1 DECAL, Starting Instructions
24 20566 1 DECAL, 1-800 #
25 49541 4 HHCS, M10-1.5 35
26 52859 4 NUT, M10-1.5 Locking
28 26727 2 NUT, Hex 1/2 - 20 Nylokl
29 89742 2 WHEEL, 12 Pneumatic
30 B2150 2 HOOK
31 AB2074A 1 BASE
32 30809 4 GROMMET, 1/8-11/16
33 B1982 1 BUMPER
34 B2516 2 CAP, Vinyl Black
35 B2075 1 HANDLE
36 B2130 1 DECAL, 3000 PSI
37 52858 2 NUT, M8-1.25 Locking
38 27007 2 MOUNT, Vibration
39 50190 2 WASHER, M8 Flat
40 42909 2 HHCS, M8-1.25x30
41 96727 .001 ML LOCTITE, #680
GENERAC
The Reliable Ones
Page 20
Generac 3000PSI High Pressure Washer
LIMITED PRESSURE WASHER WARRANTIES
(includes Master Contractor)
GENERAC warrants to the original retail purchaser, the pressure washer manufactured by GENERAC 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 operations)
CONSUMER* COMMERCIAL*
Generac GN-Series Engine-driven Engine: 2 years 1 year
Power Washer (2nd year parts only)
Pump: 1 year 90 days
All Other Engine-driven Engine: Warranted solely by Warranted solely by
Power Washers 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, GENERAC will, at its option, repair or replace any part which, upon examination
by GENERAC or GENERAC 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, the GN-Series engines need periodic parts service and replacement to perform well. This warranty will not cover repair when normal use has
exhausted the life of a part or an engine.
THIS WARRANTY DOES NOT INCLUDE: Used products and demonstration equipment. Parts such as
GUNS, HOSES, DUAL LANCES, NOZZLES or other wear items such as quick couplers, oil, gauges, belts, Orings, 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,
GENERAC 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 GENERACs NEGLIGENCE. 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 GENERAC authorized warranty service facility or call 1-800-333-1322. Warranty service can be performed only by a GENERAC 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 CORPORATION
GENERAC
The Reliable Ones
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