Generac Portable Products 1539-0 User manual

Pressure Washer Owner’s Manual
3000PSI
Model No. 1539-0 (3,000 PSI High Pressure Washer) Manual No. 187701 Revision 7 (09/19/2002)
Questions? Help is just a moment away!
Preguntas? La ayuda es justa un momento lejos!
Call: Generac Pressure Washer Helpline / Llame: Línea Directa del
Lavador a Presión de Generac - 1-800-270-1408 M-F 8-5 CT
Web: www.generac-portables.com or www.briggsandstratton.com

Generac Portable Products 3000 PSI 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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Replacement Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . 16-21
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
• 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 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
• 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 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
• 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

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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.
Chemical Injection Siphon/Filter
Air Filter — Protects engine by filtering dust and debris out
of intake air.
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.
Chemical Injection Siphon/Filter — Use to siphon
detergent or other pressure washer chemicals into the low
pressure stream.
Choke Lever — Prepares a cold engine for starting.
Fuel Valve — Used to turn fuel on and off to engine.
Gas Tank — Fill tank with regular unleaded gasoline. Always
leave room for fuel expansion.
High Pressure Hose — Connect one end to the water
pump and the other end to the spray gun.
High Pressure Outlet with Quick Connect — To
connect high pressure hose.
Nozzle Extension with Quick Connect — Allows you to
switch between four different spray nozzles.
Oil Fill Cap — Fill engine with oil here.
Pressure Control Knob — Varies the pressure of the high
pressure spray.
Pump — Develops high pressure.
Recoil Starter — Use for starting the engine manually.
Spray Gun — Controls the application of water onto
cleaning surface with trigger device. Includes safety latch.
Spray Nozzles — Chemical injection (25°), 0°, 15°, 25°, and
40°: for various cleaning applications.
Throttle Lever—Sets engine in starting mode for recoil
starter and stops a running engine.
Water Inlet — Connect garden hose here.
Spray Gun
Nozzle Extension with
Quick Connect
High Pressure Hose
Throttle Lever
Choke Lever
Fuel Valve
Recoil Starter
(on front of engine)
Air Filter
Gas Tank
Pressure
Control Knob
Pump equipped with
Automatic Cool Down System
Water Inlet
Oil Fill Cap
Spray Nozzles
High Pressure Outlet
with Quick Connect

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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, handle, 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
• High pressure hose
• Handle
• Pump oil dipstick (hanging on pump)
• Accessory box (includes the following):
• (2) bottles of engine oil
• Owner’s registration card
• Safety goggles
• Bag containing 5 multi–colored quick connect nozzles
• Maintenance kit
• Owner’s manual
• Engine manual
• Engine warranty card
• Emissions control warranty card
• Spark arrestor screen
• Spray gun with quick connect fitting
• Nozzle extension with quick connect fitting
• Handle hardware, including 4 carriage bolts and
4 flange nuts
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 the registration card.
• Attach the handle to the main unit.
• Add oil to the engine.
• Add fuel to the fuel tank.
• Connect the high pressure hose to the spray gun and the
pump.
• Connect the water supply to the pump.
• Connect nozzle extension to spray gun.
• Select and install desired nozzle.
Attach Handle to the Pressure
Washer
Use either a 13mm or adjustable wrench to attach the
handle to the pressure washer.
To attach handle to the pressure washer:
• Slowly tip the pressure washer forward and let it gently
rest on the front bumper.
• Align the holes on the handle with the holes on the base.
• Insert the carriage bolts provided to hold the handle in
place (Figure 1).
Figure 1 — Attach Handle to Pressure Washer

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• Secure handle to the pressure washer using the four
provided flange nuts.
• Slowly tip the pressure washer back in place and insert
the multi–colored nozzles in the spaces provided in the
handle.
Install Oil Dipstick on Pump
CAUTION! You MUST remove the pump’s shipping cap
and install the oil dipstick. Failure to do so will void the
warranty and damage the pump.
To install the oil dipstick:
• Make sure your unit is on a level surface.
• Remove and discard the shipping cap located on the
pump (Figure 2).
• Install the oil dipstick.
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 clean regular unleaded fuel 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 the area around the fuel fill cap, remove the cap.
Slowly fill tank to the bottom of the filler neck (Figure 3).
• Install the 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 high pressure hose and attach quick connect end
of hose to the base of the spray gun (Figure 4). Pull
down on the collar of the quick connect, slide onto the
spray gun and let go of collar. Tug on hose to be sure of
a tight connection.
Maximum Fuel Level
Figure 3 — Add Gasoline to Fuel Tank
Figure 2 — Install Oil Dipstick onto the Pump
Shipping Cap
Pump Oil
Dipstick
Remove shipping cap and
install oil dipstick here.

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• Similarly, attach the other end of the high pressure hose
to the high pressure outlet on the pump. 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.
• Before you connect your garden hose to the water inlet,
inspect the inlet screen (Figure 5). Clean the screen if it
contains debris, replace if 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 5).
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
warning will not be covered by the warranty.
• Turn ON the water and squeeze the trigger on the gun
to purge the pump system of air and debris.
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 is secure.
• Check for properly tightened hose connections.
• Check to make sure that there are no kinks, cuts, or
damage to the high pressure hose.
• Check that oil has been added to the proper level in the
engine crankcase.
• Add the proper gasoline to fuel tank.
• Provide a proper water supply (not to exceed 100°F) at
a minimum flow of 3.3 gallons per minute.
• Be sure to read “Safety Rules” and “How To Use Your
Pressure Washer” before using the pressure washer.
Inspect inlet
screen. Do Not
use if damaged;
clean if dirty.
Figure 5 — Connect Garden Hose to Water Inlet
Connect high
pressure hose
here.
Figure 4 — Connect High Pressure Hose to Spray Gun

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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.
How to Start Your Engine
The best way to start your pressure washer for the first
time is to follow these instructions step–by–step. This
starting information also applies if 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 that can flow at a rate of
3.3 gallons per minute or more.
• Make sure the unit is in a level position.
• Check that the high pressure hose is connected to the
spray gun and to the pump. See “Preparing Pressure
Washer for Use” on page 5.
• Connect the garden hose to the water inlet on the
pressure washer pump and 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 the trigger on the spray gun to relieve the air
pressure caused by turning ON the water. Water will
discharge from the spray gun in a thin stream. Hold the
trigger until a steady stream of water appears. This will
make it easier to pull start the engine. Release the
trigger.
• Apply the safety latch to the spray gun trigger (Figure 6).
• Move the fuel valve to the “On” position (Figure 7).
• Move the throttle lever to the “Fast” position
(Figure 8).
•To start a cold engine, move the choke lever to the
“Closed” position. To restart a warm engine, leave
the choke lever in the “Open” position (Figure 9).
• Set the engine switch to the “On” position (Figure 10).
• Grasp starter grip and pull slowly until you feel some
resistance. Then pull cord out with rapid full arm stroke.
Let rope return slowly. Do Not let rope “snap back”
against starter.
Figure 7 — Fuel Valve
On
Off
Figure 8 — Throttle Positions
Throttle Lever
Fast
Slow
Figure 9 — Choke Positions
Choke Lever
Closed
Open
Figure 10 — Engine Switch
Off
Engine Switch
On
Safety Latch
Figure 6 — Spray Gun with Safety Latch Engaged

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• If the choke lever has been moved to the “Closed”
position to start the engine, gradually move it to the
“Open” position as the engine warms up.
• Attach the nozzle extension to the spray gun. Tighten by
hand (Figure 11).
• Select the desired quick connect nozzle and insert it into
the end of the nozzle extension (see “How To Use the
Nozzles”).
• Disengage the safety latch on the spray gun.
How to Stop Your Pressure Washer
• Move the throttle lever to the “Slow” position.
• Move the fuel valve to the “Off” position.
• Wait for the engine to idle down.
• Move the engine switch to the “Off” position.
• Simply shutting off the engine will not release pressure in
the system. Squeeze trigger on the spray gun to
relieve pressure in the hose.
How to Use the Nozzles
CAUTION! Never exchange nozzles without
locking the safety latch on the trigger.
The quick–connect on the nozzle extension allows you to
switch between five different nozzles. The nozzles vary the
spray pattern as shown below (Figure 12).
Follow these instructions to change nozzles:
• Engage the safety latch on the spray gun.
• Pull back the collar on the quick–connect and pull the
current nozzle off. Store the nozzle in the space provided
on the handles storage panel.
NOTE: For a more gentle rinse, select the white 40° or
green 25° nozzle. To scour the surface, select the yellow
15° or red 0° nozzle. To apply chemical, select the black
nozzle.
• Pull back on the collar, insert the new nozzle and release
the collar. Tug on the nozzle to make sure it is securely
in place.
• For most effective cleaning, keep the spray nozzle
between 8 to 24 inches away from the cleaning surface. If
you get the spray nozzle too close, you may damage the
cleaning surface.
White
40°
Green
25°
Black
25° Yellow
15°
Red
0°
Low Pressure High Pressure
Figure 12 — Nozzles
Figure 11 — Connect Nozzle Extension to Spray Gun
Use to
apply
chemical

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Cleaning and Applying Chemical
CAUTION! 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.
IMPORTANT: Use soaps designed specifically for
pressure washers. Household detergents could damage
the pump.
To apply detergent follow these steps:
• Review the use of the nozzles.
• Prepare the detergent solution as required by the
manufacturer.
• Place the chemical injection siphon/filter into the
detergent container.
CAUTION! Keep the chemical injection tube from
coming in contact with the hot muffler.
• Make sure the black nozzle is installed.
NOTE: Detergent cannot be applied with the high
pressure nozzles (White, Green, Yellow, or Red).
• 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 and 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. Do Not allow the
detergent to dry on (prevents streaking).
• Allow the detergent to soak in between 3–5 minutes
before washing and rinsing. Reapply as needed to prevent
surface from drying.
Pressure Washer Rinsing
WARNING! Be extremely careful if you must
use the pressure washer from a ladder, scaffolding
or any other relatively unstable location. Hose
water pressure builds as you climb. When you press
the trigger, the recoil from the initial spray can be
very strong. The high pressure spray could cause
you to fall if you are too close to the cleaning
surface.
After you have applied detergent, scour the surface
and rinse it clean as follows:
• Apply safety latch to spray gun.
• Remove the black chemical nozzle from the nozzle
extension.
• Select and install the desired high pressure nozzle
following the instructions “How to Use the Nozzles” on
page 9.
• Keep the spray gun a safe distance from the area you
plan to spray.
• Increase or decrease spray pressure by turning the
pressure control knob counterclockwise or clockwise
respectively (Figure 13). Use lower pressure to wash
items such a as a car or boat. Use higher pressure to
strip paint and degrease driveways.
• 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 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. At this temperature, the system
engages and cools the pump by discharging the warm
water onto the ground. This system prevents internal
damage to the pump.
Pressure
Control
Knob
Figure 13 — Pressure Control Knob

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SPECIFICATIONS
Rated Pressure . . . . . 3,000 PSI
Flow Rate . . . . . . . . . . 3.0 gallons per minute (gpm)
Detergent . . . . . . . . . . Use detergent approved for
pressure washers
Water Supply
Temperature . . . . . . . Not to exceed 100°F
Automatic Cool . . . . Will cycle when water
Down System reaches 125°-155°F
Shipping Weight . . . . 142 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 high pressure washer as instructed in this
manual.
• Some adjustments will need to be made periodically to
properly maintain your high pressure washer.
• All maintenance in this manual and the engine owner’s
manual should be made at least once each season.
• Once a year you should clean or replace the spark plug,
clean or replace the air filter and check the spray gun and
nozzle extension assembly for wear. A new spark plug
and clean air filter assure proper fuel-air mixture and
help your engine run better and last longer. Please refer
to your engine owner’s manual for more details.
Before Each Use
• Check engine oil level.
• Check water inlet screen for damage.
• Check in-line filter for damage.
• Check high pressure hose for leaks.
• Check detergent siphoning tube and filter for damage.
• Check spray gun, nozzle extension, and nozzles for leaks.
• Rinse out garden hose to flush out debris.
PRESSURE WASHER
MAINTENANCE
Check and Clean Inlet Screen
Examine the screen on the water inlet. Clean it if the
screen is clogged or replace it if screen is damaged.
Check High Pressure Hose
The high pressure hose can develop leaks from wear,
kinking, or abuse. Inspect the hose each time before using
it. Check for cuts, leaks, abrasions or bulging of cover,
damage or movement of couplings. If any of these
conditions exist, replace the hose immediately.
WARNING! 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.
• Attach the black low pressure nozzle.
• 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 3000 PSI Pressure Washer
12
Check Gun and 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 14 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 reattach 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. Remove the nozzle from the end of the nozzle
extension (Figure 15).
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 15).
5. Using a garden hose, remove additional debris by back
flushing water through the nozzle extension
(Figure 16). Back flush between 30 to 60 seconds.
Use wire here
to remove
debris
Figure 15 — Nozzle Maintenance
Nozzle Extension
Filter Screen
O-ring
Figure 14 — Clean In-Line Filter
Figure 16 — Backflushing the Nozzle Extension

Generac Portable Products 3000 PSI 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 each of the
Quick Connect nozzles.
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.
Pump Maintenance
Changing Pump Oil
Change oil after first 50 hours of operation and then every
200 hours or 3 months, whichever occurs first.
NOTE: When changing pump oil, use only high quality
nondetergent 30 weight oil. Use no special additives.
Change pump oil as follows:
• Clean area around brass oil drain plug at the bottom of
the pump.
• Remove oil drain plug. Drain oil completely into an
approved container.
• When oil has completely drained, install oil drain plug
and tighten firmly.
• Clean area around pump oil dipstick. Remove dipstick
and fill pump with recommended oil to the “Full” mark
on the dipstick.
• Install the pump oil dipstick.
• Wipe up any spilled oil.
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.

Generac Portable Products 3000 PSI Pressure Washer
14
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. Flush for one to two minutes.
2. Shut off the engine and let it cool, then remove all
hoses. Disconnect spark plug wire from spark plug.
3. Empty the pump of all pumped liquids by pulling the
recoil handle about 6 times. This should remove most
of the liquid in the pump.
4. Use Generac brand pump saver 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.

Generac Portable Products 3000 PSI 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. Low pressure nozzle installed.
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. Replace nozzle with high pressure nozzle.
2. Clear inlet.
3. Provide adequate water flow.
4. Straighten inlet hose, patch leak.
5. Check and clean inlet hose strainer.
6. Provide cooler water supply.
7. Clear blocks in outlet hose.
8. Replace gun.
9. Clean nozzle.
10. Contact Generac service facility.
Detergent fails to mix with
spray.
1. Detergent siphoning tube is not
submerged.
2. Chemical filter is clogged.
3. Dirty in-line filter.
4. High pressure nozzle installed.
1. Insert detergent siphoning tube into
detergent.
2. Clean or replace filter/detergent
siphoning tube.
3. See “Check In-Line Filter” on page 12.
4. Replace nozzle with low pressure nozzle.
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 Honda
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 Honda service facility.
10. Contact Honda service facility.
11. Contact Honda service facility.
Engine shuts down during
operation.
1. Out of gasoline.
2. Low oil level.
1. Fill fuel tank.
2. Fill crankcase to proper level.
Engine lacks power.
Dirty air filter.
Replace air filter.
Engine “hunts” or falters.
Choke is opened too soon.
Move choke to halfway position until engine
runs smoothly.

Generac Portable Products 3000 PSI Pressure Washer
16
EXPLODED VIEW — UNIT

Generac Portable Products 3000 PSI Pressure Washer
17
PARTS LIST — UNIT
Item Part # Qty.Description
1 NSP 1 ENGINE
2 B2043GS 4 BOLT, Carriage
3 B190548GS 1 BASE
4 CB3861CGS 1 HANDLE
5 B4160GS 1 DECAL, Instructions
6 99583GS 5 NUT
7 B2150GS 1 HOOK, Square Neck
8 B2516GS 2 CAP, Vinyl
9 CB4105GS 1 BUMPER
10 30809GS 5 GROMMET
11 187974AGS 1 DECAL, 5 QD Nozzles
12 187735GS 1 DECAL, Unit
13 88521GS 2 ASSY, Wheel
14 190146GS 2 PUSHNUT
15 48031GGS 1 CLAMP, Hose
16 A1040DGS 1 HOSE, Chemical Inject
17 A1041GS 1 FILTER, Chemical Hose
18 B4805GS 1 HOSE
19 87815GS 1 GOGGLES, Safety
20 B1436BGS 1 GUN, with Molded Grip
21 23645GS 4 SCREW
22 22237GS 4 WASHER, Lock
23 187701GS 1 MANUAL, Owners
24 B3858GS 1 ASSY, Wand Ext. with QD
25 B1464GS 1 MANUAL, Engine
26 BB3061BGS 2 BOTTLE, Oil
28 190862GS 1 KIT, Maintenance
29 188194GS 2 RIVET, Blind
31 191413GS 2 VIBE MOUNT, with Washer
33 B2126AGS 1 ASSY, Pump (see pages 18-21)
34 64416GS 4 BOLT
35 52859GS 4 NUT, Lock
36 B4224GS 1 SCREEN, Gun Inlet
37 186839GS 1 INLET, Garden Hose
38 97837GS 1 O-RING, High Pressure Hose
39 95458GS 1 CONNECT, Quick
40 B1554GS 1 VALVE, Thermal Relief
41 186301GS 1 KIT, Nozzles QD
42 63281GS 1 KEY
43 187952GS 1 DECAL, Cool Down System
44 187918GS 1 DECAL, Quick Reference
45 B4196GS 1 KIT, Handle Hardware
46 11287628PGS 1 DIPSTICK, Pump

Generac Portable Products 3000 PSI Pressure Washer
18
EXPLODED VIEW — PUMP

Generac Portable Products 3000 PSI Pressure Washer
19
PARTS LIST — PUMP
Item Part # Qty Description
1 110B2126GS 1 Cap
2 10887628PGS 1 Circlip
3 112B2126GS 1 Snap Ring
4 113B2126GS 1 Bearing
5 109B2126GS 1 Pump Body
6 11287628PGS 1 Oil Cap/Dipstick
7 11087822PGS 3 Nut
8 11187822PGS 3 Piston Washer
9 123B2126GS 3 Piston
10 11687628PGS 3 Spacer Disc
11 11587628PGS 3 O-Ring
12 115B2126GS 3 Piston Pin
13 120B2126GS 3 Guiding Piston
14 119B2126GS 3 Con Rod
15 118B2126GS 1 Complete Rear Cover
16 117B2126GS 6 Screw
17 116B2126GS 1 O-Ring
18 12687628PGS 1 Snap Ring
19 12587628PGS 1 Bearing
20 149B2126GS 1 Hollow Shaft
21 155B2327GS 4 Screw
22 152B2126GS 1 Grub Screw
23 63281GS 1 Key
Service Kits:
Item Part # Qty Description
24 150B2126GS 1 Gas Engine Flange
25 22237GS 4 Washer, Lock
26 23645GS 4 Screw
27 151B2126GS 1 Bushing
28 12187822PGS 1 Seal
29 B1554GS 1 Valve, Thrmal Relief
30 10487628PGS 2 Plug
31 137B2126GS 8 Washer
32 10087822PGS 8 Screw
33 102B2126GS 6 Plug
34 10187822PGS 6 O-Ring
35 10287822PGS 6 Complete Valve
36 10387822PGS 6 O-Ring
37 11193360PGS 1 Plug
38 136B2126GS 1 Head
39 10387628PGS 2 O-Ring
40 106B2126GS 3 Support Ring
41 10587822PGS 3 Gasket
42 108B2126GS 3 Piston Guide
43 10393360PGS 3 Gasket
44 10493360PGS 3 O-Ring
45 131B2126GS 3 Rear Piston Guide
46 16593360PGS 3 Seal
A
B
C
D
E
500-87628PGS
Valve Kit
201-B2126GS
Piston Kit
202-B2126GS
Oil Seal Kit
203-B2126GS
Water Seal Kit
204-B2126GS
Support Ring
Kit
Item
Qty.
Item
Qty.
Item
Qty.
Item
Qty.
Item
Qty.
35
36
6
6
8
3
1
17
46
1
1
3
41
44
3
3
40
3

Generac Portable Products 3000 PSI Pressure Washer
20
EXPLODED VIEW — UNLOADER