GEN RAC °]
Portable Products
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High Pressure Washer Owner's Manual
Model No. 1537-0 (2,400 PSIHigh Pressure Washer) Manual No. 187699 Revision I (12/14/2000)
Visit our Generac website: www.generac-portables.com
A This is the safety alert symbol. It isusedto alert you to potential personal injury hazards.
Obey all safety messagesthat follow this symbol to avoidpossible injury or death.
Generac Portable Products 2,400 PSIHigh PressureWasher
EQUIPMENT
DESCRIPTION
CONGRATULATIONS on your purchase of a
GENERAC high pressure washer. It has been designed,
engineered and manufactured to giveyou the best possible
dependability and performance.
This manual contains information for a high pressure
washer that operates at 2,400 PSIat a flow rate of
2.2gallons per minute. This highquality residential system
features 10" wheels, axial campump with stainlesssteel
pistons, automatic cool down system, chemical injection
system, adjustable spray nozzle. Includes safetygoggles,
heavy duty 25' hose, and more.
Pleaseread and retain this manual.The instructions will
enable you to assembleyour unit without tools, and
maintain your high pressure washer properly.
Every effort hasbeen made to ensure that the information
in this manualis 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 pressurewasher helpline at
1-800-270-1408.
CUSTOMER
RESPONSIBILITIES
• Readand observe the safety rules.
• Follow regular schedule in maintaining, caring for and
usingyour high pressure washer.
• Foroff-season storage, review "Preparing the Unit for
Storage" on page 14.
SAFETY RULES
_ AUTION! When setting up,transporting,
adjusting or making repairs to your high pressure
washer,alwaysdisconnect the spark plug wire from
the spark plug and place the wire where it cannot
contact spark plug.
_ DANGER! Engineexhaust gasescontain DEADLY
carbon monoxide gas.This dangerousgas,if
breathed in sufficient concentrations, can cause
unconsciousness or even death. OperatJ_ this
equipment only in the open air where adequate
ventilation isavailable.
_ ANGER! 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 gasolineon a hot
engine.Allow unit to coot for 2 minutes before
refueling. Comply with all laws regulating storage
and handlingof 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 areasawayfrom
combustible materials, combustible fumes or dust.
The high pressure equipment is designedto be usedwith
Generac authorized parts only. Ifyou use this equipment
with parts that do not comply with minimum
specifications, the user assumesall risks and liabilities.
Some chemicals or detergents may be harmful if inhaled
or ingested,causingsevere nausea,fainting or poisoning.
The harmful elements maycause property damageor
severe injury.
Do Not allow CHILDREN to operate the pressure
washer at any time.
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Generac Portable Products 2,400 PSIHigh PressureWasher
• Operate engine only at governed speed.Runningthe
engine at excessive speeds increasesthe hazardof
personal injury. Do Not tamper with parts which may
increase or decreasethe 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 usea spraygun whichdoesnot havea trigger lock
or trigger guard in placeand in working order.
• Keep the hose connected to machine or the spraygun
while the system ispressurized. Disconnecting the hose
while the unit is pressurized is dangerous.
• Never operate units with broken or missing parts, or
without protective housing or covers.
• Operate and store this unit on astable surface.
• Check the fuel system for leaks or signs of deterioration,
such as chafed or spongy hose, loose or missing clamps,
or damagedtank or cap.Correct all defects before
operating the pressure washer.
• Do Not spray flammableliquids.
• Do Not secure the spraygun inthe open position.
• Use a respirator or mask whenever there is a chance
that vaporsmay be inhaled.Readall instructionswith
mask so you are certain the mask will provide the
necessary protection againstinhalingharmful vapors.
• Never aim the spray 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
fluidstream created by a leak in the high pressurehose.
• Always wear eye protection when you usethis
equipment or when you are in the vicinitywhere the
equipment is in use.
• High pressure spraycan causepaint 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 spraygun, nozzles and accessories
are correctly attached.
• High pressure spray maydamagefragile itemsincluding
glass.Do Not point spraygun at glasswhen in the jet
spray mode.
• Hold the spraygun firmly in your hand before you start
the unit. Failureto do so could result in an injury from a
whipping spray gun. Do Not leavethe spray gun
unattended while the machine is running,
• The cleaning area should haveadequate slopes and
drainage to reduce the possibility of a fall due to slippery
surfaces.
• Keepwater spray awayfrom 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 immediatelyafter shutting it down. Avoid
contact with a hot muffler or engine asyou could be
severely burned.
• High pressure hose can develop leaks from wear, kinking,
abuse, etc. Water sprayingfrom a leak is capable of
injectingmaterial into skin. Inspect hose eachtime before
usingit. Check all hosesfor cuts, leaks, abrasions or
bulgingof cover, or damageor 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 installedand ingood
condition before operating the pressure washer. These
components act asspark arresters if the enginebackfires.
In the State of California a spark arrester is required by law
(Section 4442 of the California Public ResourcesCode).
Other states may have similar laws.Federal laws applyon
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 Honda
service dealer.
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GeneracPortableProducts2,400PSIHighPressureWasher
KNOW YOUR PRESSURE WASHER
Read this owner's manual and safety rules before operating your high pressure washer.
Compare the illustrationswith your high pressure washer to familiarize yourself with the locationsof various controls and
adjustments. Savethis manual for future reference.
High Pressure Hose
Recoil Starter
SprayGun
Chemical Injection
r_ Siphon/Filter
Water Inlet
Throttle Control Lever
Oil Fill/Dipstick
Air Filter
High Pressure Outlet
Adjustable Nozzle
Adjustable Nozzle -- Always attached to nozzle
extension. Adjustable nozzle allows you to adjust spray
pressure and spray pattern.
Air Filter -- Dry type filter element limits the amount of
dirt and dust that gets inthe engine.
Automatic Cool Down System -- Cycles water
through pump when water reaches 140°-145°EWarm
water wilt dischargefrom pump onto ground. This system
prevents internalpump damage.
Chemical Injection SiphonlFilter -- Use to siphon
detergent or other pressurewasher chemicals into the low
pressure stream.
Choke Lever -- Preparesa cold engine for starting.
Pump equipped with
Automatic Cool Down System
High Pressure Hose -- Connect one end to water
pump and the other end to spray gun.
High Pressure Outlet -- Connection for high pressure
hose.
Oil Fill/Dipstick -- Check and fill with oil here.
Pump -- Develops high pressure.
Recoil Starter -- Used for starting the engine manually.
Spray Gun -- Controls the application of water onto
cleaningsurface with trigger device. Includes safety latch.
Throttle Control Lever -- Sets engine in starting mode
for recoil starter and stops a running engine.
Water Inlet -- Connection for garden hose.
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GeneracPortableProducts2,400PSIHighPressureWasher
IMPORTANT: Read entire owner's manualbefore you
attempt to assembleor operate your new pressure washer.
REMOVE PRESSURE
WASHER FROM
CARTON
• Removethe parts box includedwith pressure washer.
• Slicetwo corners at the end of carton from top to
bottom so the panel can be folded down fiat, then
remove all packing material.
• Roll pressure washer out of carton.
Carton Contents
Items in the carton include:
Main Unit
Parts Box (which includesthe following):
Goggles
Handle Assembly
Handle FasteningHardware (which includes):
Carriage Bolts (2)
PlasticKnobs (2)
"J" Hook
Chemical Hose Clip
Nozzle Cleaning Kit
High Pressure Hose
Quick Connect
Owner's Manual
EngineManual
Owner's Registration Card
SprayGun
Nozzle Extension
Oit Bottle
O-Ring MaintenanceKit
If any of the above parts are missingor damaged,call the
pressure washer helpline at 1-800-270-1408.
PREPARING PRESSURE
WASHER FOR USE
If you have any problems with the assemblyof your
pressure washer or if parts are missingor 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 the registration card.
• Attach the handle.
• Add oil to the engine crankcase.
• Add fuel to the fuel tank.
• Connect the high pressure hoseto the spray gunand the
pump.
• Connect the water supply to the pump.
Attach Handle
NOTE: All assemblyoperations given in this section will
be described from the perspective of assemblingthe
pressure washer from the rear.
• Placethe handle onto the handle supports already
connected to the main unit. Makesure the holes in the
handle align with the holes on the handle supports
(Figure I).
Handle
Supports
NOTE: It may be necessaryto move the handle supports
from side to side in order to alignthe handle so it will slide
over the handle supports.
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GeneracPortableProducts2,400PSIHighPressureWasher
• Insertthecarriageboltthroughtheholesfromthe
outsideoftheunitandattachaplasticknobfromthe
insideoftheunit.Tightenbyhand(Figure2).
G
• Insert the "J"hook into the second from the left slot in
the accessorytray (Figure 3).
• Pinchthe chemical hose that comes out of a hole in the
unit's baseand slide it into the metal clip asshown in
Figure4.
Add Engine Oil
IMPORTANT: Any attempt to crank or start the engine
before it hasbeen properly servicedwith the
recommended oil may result in anenginefailure.
• Placepressurewasher on a level surface.
• Refer to the engine owners manual to add recommended
oil to engine.
NOTE: Check olt often during engine break-in. Refer to
engine owner's manual for recommendations.
Add Gasoline
_ ANGER! Never fill fuel tank indoors.Never fill
fuel tank when engine isrunning or hot. Do Not
smoke when filling fuel tank.
_ ARNING! Never fillfuel tank completely full.
Provide spacefor fuel expansion. Wipe away any
fuel spillagefrom engine and equipment before
starting.
• Usefresh,cleanunleadedautomotive gasolineand store in
approved, clean, covered containers. Use clean fill
funnels. Never use "stale" gasolineleft over from last
seasonor gasoline stored for longperiods.
• Clean areaaround fuel fill cap, remove cap.
• Slowly add gasolineto fuel tank. Use a funnel to prevent
spillage.Fill tank to "Fuel Level Mark" (Figure 6).
• Align the clip directly abovethe hole inthe baseand
attach it to the lower accessory tray flange (Figure5).
Slide the chemicalhose through the metal clip so that it
istight but not kinked.
• Install fuel capand wipe up any spilled gasoline.
Connect Hose and Water Supply to
Pump
IMPORTANT: You must attach all hoses before you start
the engine.Starting enginewithout all hoses connected and
water supplied will damagethe pump.
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GeneracPortableProducts2,400PSIHighPressureWasher
NOTE: Your pressure washercomes with a quick connect
that you can use to attach the high pressure hose to either
the pump or spraygun.
• Uncoil the high pressure hose and attach the female
quick connect to one end of the hose. Attach the male
quick connect to the high pressurefitting on the pump
(Figure 7).
• Attach the hoseto the base of the spray gun (Figure 8).
Tighten by hand.
• Attach the other end of the high pressure hose to the
high pressure outlet on the pump (Figure 9). Pull down
on the collar of the quick connect, slide onto the pump
and let go of collar. Pull on hose to be sure of a tight
connection.
• Beforeyou connect your garden hose to the water inlet,
inspect the inlet screen (Figure 10). Clean the screen if it
contains debris, replace it if it is damaged.DO NOT RUN
THE PRESSUREWASHER IFTHE SCREENISDAMAGED.
• Run water through your garden hose for 30 seconds to
cleanout any debris. Turn off water.
• Connect the garden hose to the water inlet. Tighten by
hand (Figure 10).
_ ARNING! 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 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 adequateeye protection.
Checklist Before Starting Engine
Review the unit's assemblyto confirm you have performed
all of the following:
• Makesure the handle isin place and secure.
• Check that oil hasbeen added to the proper level in the
engine crankcase.
• Add the proper gasolineto fuel tank.
• Check for properly tightened hose connections.
• Check to make sure that there are no kinks, cuts, or
damageto the high pressure hose.
• Provide a proper water supply (not to exceed 140°F) at
an adequate flow.
• Besure to read "Safety Rules" and "How To UseYour
PressureWasher" before usingthe pressure washer.
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Generac Portable Products 2,400 PSIHigh PressureWasher
HOW TO USE YOUR
PRESSURE WASH ER
If you have any problems operating your pressure washer,
pleasecall 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 instructionsstep-by-step. This starting information
also applies ifyou havelet the pressure washer sit idlefor
at least a day.
• Placethe pressure washer in anarea close enough to an
outside water source capableof supplying water at a flow
rate greater than 2.4gallons per minute.
• Check that the high pressure hose is tightly connected to
the spraygun and to the pump. See"Preparing Pressure
Washer For Use" for illustrations.
• Make sure unit isin a level position.
• Connect the garden hose to the water inleton the
pressure washer pump. Turn ON the water.
_ AUTION! Do Not run the pump without the
water supply connected and turned on. You must
follow this caution or the pump will be damaged.
• Squeezetrigger on gun until you haveasteady stream of
water. This purges the pump of air and impurities.
• Attach nozzle extension to spray gun(Figure I I). Tighten
by hand.
• Position the nozzle in the tow pressure mode (slide
nozzle forward) and squeezethe trigger on the spray gun
to relieve pressure causedby turning ON the water.
Water will flow out of the gun in a thin stream. Continue
to hold trigger until there is a steadystream of water
and no air remains in the system. Releasethe trigger.
• Engagethe safety latch to the spray guntrigger
(Figure 12).
SafetyLatch
• Rotate the fuel valvelever to the "On" position.
• Move the choke lever to the "Closed" position
(Figure 13).
Choke
lever in
Open
position
Fast
position
NOTE: For a warm engine, be sure the choke lever is in
the "Open" position.
• Move the throttle lever to the "Fast" position, shown
on the engine as a rabbit (Figure 13). Controls are shown
in the desired operating condition.
• Place your left foot on the lower frame and grasp the
handle as shown (Figure 14). Your unit may appear
slightly different from that shown here.
• Pull the starter grip handle lightly with your right hand
until you feel some resistance, then pull briskly.
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GeneracPortableProducts2,400PSIHighPressureWasher
• Return the starter grip handle slowly. Do Not let rope
"snap back" againststarter.
• When engine starts, slowly move choke lever to the
"Open" position. If engine falters, move choke lever to
the "Closed" position, then to the "Open" position.
• If engine failsto start after six pulls, move choke lever to
the "Open" position. If engine fires, but does not
continue to run, move choke lever to the "Closed"
position, then to the "Open" position.
NOTE: If the recoil starter ishard to pull,it maybe necessary
to squeezethe gun trigger to relieveinternalpump pressure.
How to Stop Your Pressure Washer
• Move throttle lever on engine to "Stop" position.
• Rotate the fuel valve lever to the "Off" position.
• Squeeze trigger on the spray gun to relieve
pressure in the hose.
NOTE: A small amount of water will squirt out when you
releasethe pressure.
How to Use Accessory Tray
The unit isequipped with an accessory tray with placesto
store your nozzle extension, and slots to hold the cleaning
solution bottle and the detergent siphoning filter. There are
alsotwo hooks on the handle to hold your spraygun and
high pressure hose.
NOTE: The extra holes in the tray are for storing a brush
and a turbo wand. The brush and turbo wand are NOT
included with your pressure washer.You canbuy these
itemsasoptionalaccessories.
• Placethe nozzle extension through the hole on the
accessorytray as shown in Figure 15.
• Hang your chemical solution bottle on the "J"hook and
place the detergent siphoning filter in the last slot on the
left (Figure 15).
• Hang the high pressure hose on the hook attached to
the handle on the right side of the unit (Figure 15).
• Placethe spraygun on the hook attached to the handle
on the left side of the unitas shown on page4.
How to Use the Adjustable Nozzle
You now should know how to START your pressure
washer and how to STOP it. The informationin this
section witl tell you how to adjust the spraypattern 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.
The adjustable nozzle affixed to the nozzle extension
permits you to adjustthe spray pattern and the spray
pressure, asfollows:
• Slidethe nozzle forward to adjust the spray to low
pressure mode (Figure 16).Slidethe nozzle backward to
achieve high pressure.
Slide nozzle backward
for high pressure mode.
Slide nozzle forward for
low pressure mode and
detergent application.
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Generac Portable Products 2,400 PSIHigh PressureWasher
• Point the nozzle down towards a firm surface and press
the trigger to test the pattern (Figure 17).
• Twisting the nozzle adjuststhe spray pattern from a
narrow pattern to a fan pattern (Figure 18).
Twist nozzle clockwise
counterclockwise for fan for narrow spray
• For most effective cleaning, keepthe spray nozzle
between 8 to 24 inchesaway from cleaningsurface.
• If you get the spraynozzle too close, especiallyusing high
pressure mode, you maydamage the surface being
cleaned.
• Do Not get closer than 8 incheswhen cleaningtires.
Applying Detergent with the
Adjustable Nozzle
A WARNING! 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 damagethe pump.
IMPORTANT: Use soaps designed specifically for
pressure washers. Household detergents could damage
the pump.
To apply detergent, follow these steps:
• Reviewthe useof adjustable nozzles.
• Preparedetergent solution asrequired by the
manufacturer.
• Hangthe detergent solution on the "J" hook attached to
the accessory tray, asshown in Figure 19.
• Placethe small filter end of the detergent siphoning tube
intothe detergent container.
A AUTION! 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.
• Makesure the garden hose is connected to the water
inlet.Check that the high pressure hose isconnected to
the spray gun and the pump. Start the engine.
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Generac Portable Products 2,400 PSIHigh PressureWasher
• Apply the detergent to a dry surface, starting at lower
portion of area to be washed and work upward, using
long, even, overlapping strokes. Do Not allow the
detergent to dry on (prevents streaking).
• Allow the detergent to "soak in" for 3-5 minutes before
washing and rinsing. Reapplyasneeded to prevent
surface from drying.
IMPORTANT: You must flush the chemicalinjection
system after each use by placing the filter into a clean
bucket of water and running the pressure washer in low
pressure for I-2 minutes.
Pressure Washer Rinsing
_ ARNING! Be extremely careful ifyou must
use the pressure washer from a ladder,scaffolding
or anyother relatively unstable location. Pressure in
a running washer builds as you climb. When you
press the trigger, the recoil from the inltiat spray
could causeyou to fall. The high pressure spray
could alsocauseyou to fall ifyou are too close to
the cleaningsurface.
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 siphon tube from bottle.
• Keepthe spray gun a safedistance from the area you
plan to spray.
• Apply a high pressure spray to a smallarea,then check
the surface for damage. If no damageisfound, it isokay
to continue cleaning.
• Start at the top of the area to be rinsed, working down
with same overlapping strokes asyou usedfor cleaning.
Automatic Cool Down System
(Thermal Relief)
If you run the engine on your pressure washer for
3-5 minutes without pressingthe trigger on the spray gun,
circulating water in the pump can reach a temperature
between 140-145°E When the water reachesthis
temperature, the automatic coot down system engagesand
cools the pump by discharging the warm water onto
the ground. This system prevents internal damageto the
pump.
SPECIFICATIONS
Rated Pressure ..... 2,400 psi
Flow Rate .......... 2.2 gallons per minute (gpm)
Detergent .......... Use detergent approved for
pressure washers
Water Supply Ternp. Not to Exceed 140°F
Automatic Cool .... Will cycle when water
Down System ....... reaches 140°- 145°F
Pump Oil ........... SAE80W-90, 4.73 oz (140 ml)
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