Generac Power Systems 1296-0 User manual

1800PSI
Pressure Washer Owner’s Manual
Problems?
Questions?
Before taking your unit
back to the store,
call the pressure washer
helpline at
1-800-2 0-1408
M-F 8-5 CT
GENERAC
This is the safety alert symbol. It is used to alert you to potential personal injury hazards.
Obey all safety messages that follow this symbol to avoid possible injury or death.
Model No. 12 6-0 (1800 PSI High Pressure Washer) Manual No. B515 Revision 1 (5/1 /2000)
Visit our Generac website: www.generac-portables.com
The Reliable Ones

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Generac Portable Products 1,800 PSI High Pressure Washer
EQUIPMENT DESCRIPTION
CONGRATULATIONS on your purchase of a
GENERAC high pressure washer. It has been
designed, engineered and manufactured to give you
the best possible dependability and performance.
This manual contains information for a high pressure
washer that operates at 1,800 PSI at a flow rate of
2.0 gallons per minute. This high quality residential
system features large 8 wheels and an axial cam
pump with stainless steel pistons, aluminum pump
head construction, automatic cool down system,and a
chemical injection system. System includes an
adjustable spray nozzle, safety goggles, a heavy duty
25 hose, and more.
Please read and retain this manual. The instructions
will enable you to assemble your unit without tools,
and maintain your high pressure washer properly.
Every effort has been made to ensure that the
information in this manual is both accurate and
current. However, Generac reserves the right to
change, alter or otherwise improve the product and its
documentation at any time without prior notice.
Should you experience any problem you cannot easily
remedy, call the pressure washer helpline at
1-800-2 0-1408.
CUSTOMER
RESPONSIBILITIES
 Read and observe the safety rules.
 Follow regular schedule in maintaining, caring for
and using your high pressure washer.
 For off-season storage, review Preparing Unit for
Storage on page 14.
SAFETY RULES
CAUTION! When setting up, transporting,
adjusting or making repairs to your high
pressure washer, always disconnect the spark
plug wire from the spark plug and place the
wire where it cannot contact spark plug.
DANGER! Engine exhaust gases contain
DEADLY carbon monoxide gas. This dangerous
gas, if breathed in sufficient concentrations, can
cause unconsciousness or even death. Operate
this equipment only in the open air where
adequate ventilation is available.
DANGER! Gasoline is highly FLAMMABLE
and its vapors are EXPLOSIVE. Do Not permit
smoking, open flames, sparks or heat in the
vicinity while handling gasoline. Avoid spilling
gasoline on a hot engine. Allow unit to cool for
2 minutes before refueling. Comply with all laws
regulating storage and handling of gasoline.
Read this manual carefully and become familiar
with your pressure washer. Know its applications,
its limitations, and any hazards involved.
 Operate this pressure washer in areas away from
combustible materials, combustible fumes or dust.
 The high pressure equipment is designed to be
used with Generac authorized parts ONLY. If you
use this equipment with parts that do not comply
with minimum specifications, the user assumes all
risks and liabilities.
 Some chemicals or detergents may be harmful if
inhaled or ingested, causing severe nausea, fainting
or poisoning. The harmful elements may cause
property damage or severe injury.
 Units with broken or missing parts, or without
protective housing or covers, should Never be
operated.
The engine exhaust from this product
contains chemicals known to the State
of California to cause cancer, birth
defects, or other reproductive harm.
WARNING:

3
Generac Portable Products 1,800 PSI High Pressure Washer
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.
Never use a spray gun which does not have a
trigger lock or trigger guard in place and in working
order.
 Keep the hose connected to machine or the spray
gun while the system is pressurized. Disconnecting
the hose while the unit is pressurized is dangerous.
 Check the fuel system for leaks or signs of
deterioration, such as chafed or spongy hose, loose
or missing clamps, or damaged tank or cap. Correct
all defects before operating the pressure washer.
Do Not spray flammable liquids.
 Use a respirator or mask whenever there is a
chance that vapors may be inhaled. Read all
instructions with mask so you are certain the mask
will provide the necessary protection against
inhaling harmful vapors.
Never aim the 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
fluid stream created by a leak in the high pressure
hose.
 Always wear eye protection when you use this
equipment or when you are in the vicinity where the
equipment is in use.
 High pressure spray can cause paint chips or other
particles to become airborne.
Do Not operate the pressure washer above the
rated pressure.
Never move the machine by pulling on the high
pressure hose. Use the handle provided on the unit.
 Always be certain the spray gun, nozzles and
accessories are correctly attached.
Do Not secure the spray gun in the (open) position.
 High pressure spray may damage fragile items
including glass. Do Not point spray gun at glass
when in the jet spray mode.
 Operate and store this unit on a stable surface.
 Hold the spray gun firmly in your hand before you
start the unit. Failure to do so could result in an
injury from a whipping spray gun. Do Not leave the
spray gun unattended while the machine is running.
 The cleaning area should have adequate slopes and
drainage to reduce the possibility of a fall due to
slippery surfaces.
 Keep water spray away from electric wiring or fatal
electric shock may result.
Do Not bypass any safety device on this machine.
 The muffler and engine heat up during operation
and remain hot immediately after shutting it down.
Avoid contact with a hot muffler or engine as you
could be severely burned.
 High pressure hose can develop leaks from wear,
kinking, abuse, etc. Water spraying from a leak is
capable of injecting material into skin. Inspect hose
each time before using it. Check all hoses for cuts,
leaks, abrasions or bulging of cover, or damage or
movement of couplings. If any of these conditions
exist, replace hose immediately. Never repair high
pressure hose. Replace it with another hose that
exceeds maximum pressure rating of your unit.
 The muffler and air cleaner must be installed and in
good condition before operating the pressure
washer. These components act as spark arresters if
the engine backfires.
In the State of California a spark arrester is required
by law (Section 4442 of the California Public
Resources Code). Other states may have similar laws.
Federal laws apply on federal lands.
NOTE: If you equip the muffler with a spark arrester, it
must be maintained in effective working order. You can
order a spark arrester through your authorized Honda
service dealer.

4
Generac Portable Products 1,800 PSI High Pressure Washer
High Pressure Hose
Adjustable Nozzle
attached to
Nozzle Extension
Safety Goggles
Choke Lever
Throttle Lever
High Pressure Outlet
Pump equipped with
Automatic Cool Down
System
Spray Gun
Water Inlet
Oil Fill
Recoil Starter
Air Cleaner
Chemical Injection Tube
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 location of the controls.
Save this manual for future reference.
Adjustable Nozzle  Always attached to nozzle
extension. Adjustable nozzle allows you to adjust spray
pressure and spray pattern.
Air Cleaner  Dry type filter element limits the
amount of dirt and dust that gets in the engine.
Automatic Cool Down System  Cycles water
through pump when water reaches 140°-145°F. Warm
water will discharge from pump onto ground. This
system prevents internal pump damage.
Chemical Injection TubeUsed to siphon chemical
from the detergent container into the water stream.
Choke Lever Prepares a cold engine for starting.
High Pressure Hose  Connect one end to high
pressure outlet and the other end to spray gun.
High Pressure Outlet  Connection for high pressure
hose.
Oil FillAdd and check engine oil here.
Pump  Develops high pressure.
Recoil Starter  Used for starting the engine.
Safety Goggles  Always use the supplied goggles
or other eye protection when running your pressure
washer.
Spray Gun  Controls the application of water onto
cleaning surface with trigger device. Includes safety
latch.
Throttle LeverSets engine in starting mode and
stops a running engine.
Water Inlet  Connection for garden hose.

5
Generac Portable Products 1,800 PSI High Pressure Washer
Read entire owners manual before you attempt
to assemble or operate your new pressure
washer.
REMOVE PRESSURE
WASHER FROM CARTON
 Remove the high pressure hose and parts box
included with pressure washer.
 Slice two corners at the end of carton from top to
bottom so the panel can be folded down flat, then
remove all packing material.
 Roll pressure washer out of carton.
Carton Contents
Items in the carton include:
 Main Unit
 High Pressure Hose
 Parts Box (includes the following):
- Oil Bottle
- Wire Form
- Goggles
- Nozzle Cleaning Kit
- ORing Maintenance Kit
- Owners Manual
- Engine Manual
- Engine Warranty
- Emissions Control Warranty
- Warranty Card
- Spray Gun
- Adjustable Nozzle Extension
If any of the above parts are missing or damaged, call
the pressure washer helpline at 18002 0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2 01408.
To prepare your pressure washer for operation you
will need to perform these tasks:
 Unfold the handle and attach the wire form that
holds high pressure hose and spray gun.
 Add oil to the engine crankcase.
 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.
Secure Handle and Wire Form
 Lift the handle upward and allow the locking caps to
slide over the bottom part of the handle to secure it
in place. (Figure 1).
 Standing behind the unit, insert the wire form into
the handle with the longer arm positioned on the left.
The hook should resemble a J (Figure 2) from this
view.
Figure 1  Secure Handle
Lift handle
and slide
locking
caps into
place
Figure 2  Attach Wire Form to Handle

6
Generac Portable Products 1,800 PSI High Pressure Washer
Add Engine Oil
WARNING! Any attempt to crank or start the
engine before it has been properly serviced with
the recommended oil will result in an engine
failure.
 Place the pressure washer on a level surface.
 Refer to the engine owners manual and fill the
engine with the recommended oil as described.
NOTE: Review engine owners manual regarding
engine breakin.
Add Gasoline
DANGER! Never fill fuel tank indoors. or when
engine is running or hot. Do Not smoke when
filling fuel tank.
WARNING! Never fill fuel tank completely full.
Fill tank to provide space for fuel expansion.
Wipe away any fuel spillage from engine and
equipment before starting.
 Use clean 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 (Figure 3).
 Slowly add regular UNLEADED gasoline to fuel
tank. Use a funnel to prevent spillage.
 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 the high pressure hose and attach one end of
the hose 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 inlet screen (Figure 6). Clean the
screen if it contains debris or replace it if it is
damaged. Do Not run the pressure washer if the
screen is damaged.
Maximum Fuel
Level
Fuel Level
Mark
Connect high
pressure hose
here.
Connect high
pressure hose
here.
Figure 3  Add Regular Unleaded Gasoline to Fuel Tank
Figure 4  Connect High Pressure Hose to Spray Gun
Figure 5  Connect High Pressure Hose to Pump

7
Generac Portable Products 1,800 PSI High Pressure Washer
 Run water through your garden hose for 30 seconds
to clean out any debris. Turn off water.
 Connect the garden hose to the water inlet
(Figure 6). Tighten by hand.
WARNING! There MUST be at least ten feet
of unrestricted garden hose between the
pressure washer inlet and any flow shut off
device, such as a Y shut-off connector or other
convenience-type water shut-off valve. Damage
to pressure washer resulting from disregarding
this warning will not be covered by the warranty.
 Turn ON the water and squeeze the trigger on the
spray gun to purge the pump system of air and
impurities.
CAUTION: Before starting the pressure
washer, be sure you are wearing adequate eye
protection.
CHECKLIST BEFORE
STARTING ENGINE
Review the units assembly to confirm you have
performed all of the following:
 Make sure the handle and wireform are in place and
secure.
 Check that oil has been added to the proper level in
the engine crankcase.
 Add the proper gasoline to fuel tank.
 Check for properly tightened hose connections.
 Check to make sure that there are no kinks, cuts, or
damage to the high pressure hose.
 Provide a proper water supply (not to exceed 140°F)
at an adequate flow.
 Be sure to read Safety Rules and How To Start
Your Engine before operating your pressure
washer.
HOW TO USE YOUR
PRESSURE WASHER
If you have any problems operating your pressure
washer, please call the pressure washer helpline at
1-800-2 0-1408.
How to Start Your Engine
The best way to start your engine-powered pressure
washer for the first time is to follow these instructions
step-by-step. You may also refer to your engine
owners manual. This starting information also applies
whenever you start the engine after you have let the
pressure washer sit idle for at least a day.
Inspect inlet screen. Do Not
use if damaged, clean if dirty.
Figure 6  Connect the Garden Hose to Water Inlet and
Turn ON the Water

8
Generac Portable Products 1,800 PSI High Pressure Washer
CAUTION: Before starting the pressure washer,
be sure you are wearing adequate eye
protection.
 Place the pressure washer in an area close enough
to a water source capable of supplying water at a
flow rate greater than 2.0 gallons per minute.
 Check that the high pressure hose is tightly
connected to the spray gun and to the pump. See
Preparing Pressure Washer for Use on page 5.
 Make sure unit is in a level position.
 Connect the garden hose to the water inlet on the
pressure washer pump. Turn ON the water.
CAUTION: Do Not run the pump without the
water supply connected and turned on. You must
follow this caution or the pump will be damaged.
 Pull the Choke rod to the CLOSED position (all the
way out, Figure 7).
NOTE: For a warm engine, be sure the choke is in the
OPEN position (no choke).
 Move the Throttle Control lever to the Fast position
(Figure 8). Always keep the throttle in the Fast
position while pressure washing.
 Ensure that the nozzle extension is NOT attached to
the spray gun. The spray gun should be held in the
left hand, as shown in Figure . Note that your unit
will differ slightly in appearance from this view.
The left hand should also be used to steady the unit
if positioned as shown.
 Standing at the rear of the unit, place your left foot
on the base of the unit.
 Squeeze the trigger on the spray gun. Water will
flow out of the spray gun in a thin stream. Continue
to squeeze the trigger.
 Grasp the recoil starter handle with your right hand
and pull slowly until you feel some resistance. Then
pull rapidly to start the engine.
 Return the starter handle slowly. Do Not let the rope
snap back against the starter.
 If the engine fails to start repeat above steps or refer
to the engine owners manual.
Choke Rod
Open
Closed
Throttle Lever
Fast
Slow
Stop
Figure 8  Throttle Control Lever Positions
Figure  Recommended Engine Starting Posture
Right Hand
pulls recoil
starter
handle
Safety Goggles
Left Foot holds base
Left Hand
stabilizes
unit and
squeezes
trigger
Do Not
attach
nozzle
extension
Figure 7  Choke Positions

Generac Portable Products 1,800 PSI High Pressure Washer
 If the choke was pulled to the CLOSED position to
start the engine, slowly push it to the OPEN position
as the engine runs smoother.
 Engage the safety latch to the spray gun trigger
(Figure 10).
 Attach the nozzle extension to the spray gun.
Tighten by hand (Figure 11).
How to Stop Your Pressure Washer
 Move the throttle lever to the Stop position.
Squeeze trigger on the spray gun to relieve
pressure in the hose.
NOTE: A small amount of water will squirt out from the
spray gun when you squeeze the trigger.
How to Use the Adjustable Nozzle
You now should know how to START your pressure
washer and how to STOP it. The information in this
section will tell you how to adjust the spray pattern and
apply detergent or other cleaning chemicals.
DANGER! Never adjust spray pattern when
spraying. Never put hands in front of nozzle to
adjust spray pattern.
On the end of your spray gun nozzle extension is a
nozzle that permits you to adjust the spray pressure
and pattern, as follows:
 Slide the nozzle forward to adjust the spray to low
pressure mode, slide it backward to achieve high
pressure (Figure 12).
 Twisting the nozzle adjusts the spray pattern from a
narrow pattern to a fan pattern Figure 13).
 Point the nozzle down toward a hard surface and
press the trigger to test the pattern (Figure 14).
Safety Latch
Figure 10  Engage Safety Latch
Figure 11  Connect Nozzle Extension to Spray Gun
Figure 12 - Adjusting Spray Pressure
Slide nozzle backward
for high pressure
mode.
Slide nozzle forward
for low pressure mode
and detergent
application.
Twist nozzle
counterclockwise for
fan spray pattern.
Twist nozzle clockwise
for narrow spray
pattern.
Figure 13 - Adjusting Spray Pattern

10
Generac Portable Products 1,800 PSI High Pressure Washer
 For most effective cleaning, keep the spray nozzle
between 8 to 24 inches away from cleaning surface.
 If you get the spray nozzle too close, especially
using high pressure mode, you may damage the
surface being cleaned.
Do Not get closer than 6 inches when cleaning tires.
Applying Detergent with the
Adjustable Nozzle
IMPORTANT: Use soaps designed specifically for
pressure washers. Household detergents could
damage the pump.
IMPORTANT: You must attach all hoses before you
start the engine. Starting the engine without all the
hoses connected and without the water turned ON will
damage the pump.
To apply detergent, follow these steps:
 Review the use of the adjustable nozzle.
 Prepare detergent solution as required by the job.
 Hang the detergent solution on the hook of the
wireform attached to the handle (Figure 15).
 Place the small filter end of the detergent siphoning
tube into the detergent container (Figure 15).
CAUTION: Keep the detergent siphoning tube
from coming in contact with the hot muffler. This
will damage the plastic tube. When inserting the
filter into a cleaning solution bottle, route the
tube so as to keep it from inadvertently
contacting the hot muffler.
 Make sure the garden hose is connected to the
water inlet. Check that the high pressure hose is
connected to the spray gun and the pump.
 Start the engine, then attach the nozzle extension.
 Slide the adjustable nozzle forward to low pressure
mode. Detergent cannot be applied with the nozzle
in high pressure position.
 Apply detergent to a dry surface, starting from the
bottom and working up.
 Allow the detergent to soak in for 3-5 minutes
before washing and rinsing. Reapply as needed to
prevent surface from drying.
 For washing, start at lower portion of area to be
washed and work upward, using long, even,
overlapping strokes.
Figure 14 Testing the Spray Pattern Figure 15  Insert the Small Filter Into Cleaning
Solution Container

11
Generac Portable Products 1,800 PSI 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 cause you to
fall. The high pressure spray could also cause
you to fall if you are too close to the cleaning
surface.
For Rinsing:
 Slide the nozzle backward to high pressure, press
the trigger and wait for the detergent to clear.
NOTE: You can also stop detergent from flowing by
simply removing detergent siphoning tube from bottle.
 Keep the spray gun a safe distance from the area
you plan to spray.
 Apply a high pressure spray to a small area, then
check the surface for damage. If no damage is
found, it is okay to continue cleaning.
 Start at the top of the area to be rinsed, working
down with same overlapping strokes as you used for
washing and applying detergent.
Automatic Cool Down System
(Thermal Relief)
If you run the engine on your pressure washer for
3-5 minutes without pressing the trigger on the spray
gun, circulating water in the pump can reach a
temperature between 140145°F. When the water
reaches this temperature, the automatic cool down
system engages and cools the pump by discharging
the warm water onto the ground. This system
prevents internal damage to the pump.
SPECIFICATIONS
Outlet Pressure. . . . . . . 1,800 psi
Flow Rate . . . . . . . . . . . 2.0 gallons per minute
(gpm)
Detergent. . . . . . . . . . . . Use detergent approved for
pressure washers
Water Supply Temp. . . . Not to Exceed 140°F
Automatic Cool . . . . . . Will cycle when water
Down System reaches 140°-145°F

12
Generac Portable Products 1,800 PSI High Pressure Washer
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 adjustable nozzle extension
assembly for wear. A new spark plug and clean air
filter assure proper fuelair mixture and help your
engine run better and last longer.
Before Each Use
 Check engine oil level.
 Check water inlet screen for damage.
 Check in-line filter for damage.
 Check high pressure hose for leaks.
 Check detergent siphoning tube and filter for
damage.
 Check spray gun and adjustable nozzle extension
assembly for leaks.
 Rinse out garden hose to flush out debris before
attaching it to the pressure washer.
PRESSURE WASHER
MAINTENANCE
Check and Clean Inlet Screen
Examine the screen on the water inlet. Clean it if the
screen is clogged or replace it if screen is damaged.
Check High Pressure Hose
The high pressure hose can develop leaks from wear,
kinking, or abuse. Inspect the hose each time before
using it. Check for cuts, leaks, abrasions or bulging of
cover, damage or movement of couplings. If any of
these conditions exist, replace the hose immediately.
WARNING: Water spraying from a leak is
capable of injecting material into skin. Inspect
hose each time before using it. Never repair a
high pressure hose. Replace it with another
hose that exceeds the maximum pressure
rating of your pressure washer.
Check Detergent Siphoning Tube
Examine the filter on the detergent hose and clean if
clogged. The tube should fit tightly on the barbed
fitting. Examine the tube for leaks or tears. Replace
the filter or tube if either is damaged.
Check Spray Gun and Adjustable
Nozzle Extension
Examine the hose connection to the spray gun and
make sure it is secure. Test the trigger by pressing it
and making sure it springs back into place when you
release it. Put the safety latch in the ON position and
test the trigger. You should not be able to press the
trigger.

13
Generac Portable Products 1,800 PSI High Pressure Washer
Check In-Line Filter
Refer to Figure 16 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 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 on page 5.
Connect the water supply and turn water ON.
 Squeeze 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 on page 5.
Connect the water supply and turn water ON.
 Start the engine according to instructions given in
How To Start Your Engine.
 Squeeze the trigger on the spray gun and hold.
 When the water supply is steady and constant,
engage the safety latch and attach the nozzle
extension.
Cleaning Detergent Siphon Tube
If the detergent siphoning system is used, you must
flush it with clean water before stopping the engine.
 Place the chemical injection tube in a bucket full of
clean water.
 Slide the adjustable nozzle forward to the low
pressure position. Flush for 12 minutes.
 Shut off the engine.
IMPORTANT: Simply shutting OFF engine will not
release pressure in the system. When the engine has
shut down, squeeze the trigger on the spray gun
to relieve the pressure in the hose.
Nozzle Maintenance
If an adjustable nozzle becomes restricted or clogged
with foreign materials, such as dirt, a pulsing
sensation during use may occur. If pulsing occurs or
the nozzle becomes partially restricted, immediately
clean the nozzle with the kit included with your
pressure washer.
To clean the nozzle:
 Shut off the engine and turn off the water supply.
 Separate the nozzle extension from the spray gun.
 Adjust the nozzle extension to the stream position.
 Remove nozzle from the end of the nozzle extension
(Figure 17) using a 2mm or 5/64 allen wrench (like
the one included in the kit).
Filter Screen
O-Ring
Nozzle Extension
Figure 16  Service In-Line Filter

14
Generac Portable Products 1,800 PSI High Pressure Washer
 Use the wire included in the kit (Figure 17) or a
small paper clip to free the foreign materials
clogging or restricting the nozzle.
 Remove additional debris by back flushing water
supply through nozzle extension (Figure 18). Back
flush between 30 to 60 seconds. Turn nozzle
extension to stream spray and move nozzle from
low to high while flushing.
 Reinstall nozzle into the nozzle extension. Do Not
overtighten.
 Reconnect the water supply, turn on the water, and
start the engine.
 Reconnect the nozzle extension to the spray gun.
 Test the pressure washer by operating with nozzle in
the high and in the low positions.
ORing Maintenance
Through the normal operation of your pressure
washer, orings, which keep the connections of the
hoses and spray gun tight and leakfree, may become
worn or damaged.
Provided with your pressure washer is an ORing
Maintenance Kit which includes replacement o-rings,
rubber washer and water inlet filter. Refer to the
instruction sheet provided in the kit to service your
units o-rings. Note that not all of the parts in the kit
will be used on your unit.
To remove a worn or damaged oring:
 Use a small flathead screwdriver to get underneath
the o-ring and pry it off.
ENGINE MAINTENANCE
See the engine owners manual for instructions on
how to properly maintain the engine.
PREPARING 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 (adjustable nozzle in
forward position). Flush for one to two minutes.
2. Shut off the engine and let it cool, then remove all
hoses. Disconnect spark plug wire from spark
plug.
3. Place the throttle lever in STOP position.
4. Empty the pump of all pumped liquids by pulling
the recoil handle about 6 times. This should
remove most of the liquid in the pump.
NOTE: To protect the unit from freezing temperatures,
draw RV antifreeze (non-alcohol) into the pump by
pouring the solution into a 3foot section of garden
hose connected to inlet adapter and pulling recoil
handle twice.
5. Store unit in a clean, dry area.
STORING THE ENGINE
See the engine owners manual for instructions on
how to properly prepare the engine for storage.
Figure 18  Backflush the Nozzle
Nozzle
Figure 17  Remove and Clean Nozzle

15
Generac Portable Products 1,800 PSI High Pressure Washer
TROUBLESHOOTING
Problem Cause Correction
Pump has following
problems: failure to produce
pressure, erratic pressure,
chattering, loss of pressure,
low water volume.
1. Nozzle in low pressure mode.
2. Water inlet is blocked.
3. Inadequate water supply.
4. Inlet hose is kinked or leaking.
5. Clogged inlet hose strainer.
6. Water supply is over 140°F.
7. High pressure hose is blocked or
leaks.
8. Gun leaks.
. Nozzle is obstructed.
10. Pump is faulty.
1. Pull nozzle backward for high
pressure mode.
2. Clear inlet.
3. Provide adequate water flow.
4. Straighten inlet hose, patch leak.
5. Check and clean inlet hose
strainer.
6. Provide cooler water supply.
7. Clear blocks in outlet hose.
8. Replace gun.
. Clean nozzle.
10. Contact Generac service facility.
Detergent fails to mix with
spray.
1. Detergent siphoning tube is not
submerged.
2. Chemical filter is clogged.
3. Nozzle is in high pressure mode.
1. Insert detergent siphoning tube
into detergent.
2. Clean or replace filter/detergent
siphoning tube.
3. Push nozzle forward for low
pressure mode.
Engine runs good at no-load
but bogs when load is
added.
Engine speed is too slow. Move throttle control to FAST position.
If engine still bogs down, contact
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.
. 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.
. 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.

16
Generac Portable Products 1,800 PSI High Pressure Washer
EXPLODED VIEW  UNIT

17
Generac Portable Products 1,800 PSI High Pressure Washer
PART LIST  UNIT
Item Part # Qty. Description
1 AB278 1 BASE, HSPW
2 NSP 1 ENGINE
3 B4 25E 1 ASSY, Pump (See pages 18-1 )
4 AB2534 1 HANDLE
5 BB3061B 1 OIL BOTTLE, 20 oz
6 52858 2 NUT, M8 Locking Flange
7 3 287 2 HHCS, M8 - 1.25 x 45
8 27007 2 MOUNT, Rubber Foot
B2142 2 WHEEL, 2" x " Black Mag
10 75402 2 PUSHNUT
11 B2168A 1 WIREFORM, Bagged
12 B1460 2 CAP, Vinyl
13 B177 2 COVER, Hinge
14 B2347 2 CAP, End
15 46476 2 CAPLUG
16 3166 1 BOLT, 1/4" - 20 x 1-3/4" Carriage
17 B2071 2 NUT, 1/4" - 20 Locking Flange
18 B275 1 HOOK, Square Neck 1/4" - 20
1 B1631A 1 BILLBOARD
20 B5158 1 DECAL, 1800 PSI
21 B27 6 1 DECAL, Instructions
22 265 1 NOZZLE, Replacement
23 B32 4 1 MANUAL, Engine
25 A1040A 1 HOSE, Chemical
26 A1041 1 FILTER, Chemical Hose
28 21217 4 MOUNT, Vibration
2 67 8 8 NUT, M8 Flange Serrated
30 21424 1 CONNECTOR, Garden Hose
31 23707 4 SHCS, 5/16" - 24 x 1"
32 501 0 2 WASHER, Flat .34" x 1"
33 48031G 2 CLAMP, Hose
34 B2218 1 O-RING
35 B4224 1 SCREEN, Gun Inlet
37 B56 3 1 HOSE, 1/4" x 25'
38 7837 1 O-RING, Hi-Pressure Transfer
3 B3263 1 GUN, High Pressure
40 B5830 1 KIT, Maintenance
41 B3107 1 HOSE, Thermal Relief
42 3080 1 GROMMET, Drain Hose
43 87815 1 GOGGLES, Safety
44 7566 1 TAG, Nozzle
45 B515 1 MANUAL, Owners
46 B3335B 1 EXTENSION, Adjustable Nozzle
47 B2163 1 KIT, Nozzle Cleaning
48 48031B 1 CLAMP, Hose 3/8"
4 247 4 WASHER, M8 Conical Ribbed

18
Generac Portable Products 1,800 PSI High Pressure Washer
EXPLODED VIEW  PUMP
45

1
Generac Portable Products 1,800 PSI High Pressure Washer
PARTS LIST  PUMP
Item Part # Qty. Description
1 B2218 1 O-RING, 1.625 ID x .103
2 9 962 3 SHCS, M6 - 1 x 25
3 B5 10 1 VALVE, 1/8 npt 1-5 PSI
4 9 835 1 O-RING, Housing Seal
5 B3090 1 VALVE, Thermal Relief
6 93680 3 SEAL, Oil Piston
9 831 3 SPACER, Pilot
8 B2 02 1 HOUSING, Piston
9 B4813 1 ADAPTER, Engine
10 9 841 3 CAP, Outlet Check Valve
11 40946 4 SHCS, M6-1.0 x 35
12 185 15 0 KIT, AXIAL CAM
1 . . . . . . 1 O-RING, Engine Seal
2 . . . . . . 3 SHCS, M6 - 1 x 25
4 . . . . . . 1 O-RING, Housing Seal
13 . . . . . . 1 WASHER, Brg. 36 x 65 x 6
Thk
14 . . . . . . 2 ASSY., Brg. Cage 45 x 65
15 . . . . . . 3 WASHER, Brg. 45 x 65 x 1
16 . . . . . . 1 CAM, Axial 5.6 3/4"SAE
1 18528 0 KIT, CHEM INJECT
18 . . . . . . 1 FITTING, Chem Inject
1 . . . . . . 1 BALL, Chem Inject
20 . . . . . . 1 SPRING, Chem Inject
21 . . . . . . 1 O-RING, Venturi & Seat, Black
22 . . . . . . 1 VENTURI, Chem Inject
28 . . . . . . 1 O-RING, Venturi, Yellow
23 185 11 0 KIT, UNLOADER 2000
21 . . . . . . 1 O-RING, Venturi & Seat, Black
24 . . . . . . 1 CAP, Unloader
25 . . . . . . 1 O-RING, Unloader Cap
26 . . . . . . 1 SPRING, Unloader
27 . . . . . . 1 PISTON, Unloader
2 . . . . . . 1 SEAT, Unloader
Item Part # Qty. Description
31 185 12 0 KIT, CHECK VALVES
11 . . . . . . 4 SHCS, M6-1.0 x 35
32 . . . . . . 3 O-RING, Check Valve
33 . . . . . . 6 ASSY., Check Valve
45 . . . . . . 3 O-RING, Check Valve, White
34 B4186 0 KIT, HEAD ALUM EG
11 . . . . . . 4 SHCS, M6-1.0 x 35
35 . . . . . . 1 HEAD, Pump
36 . . . . . . 1 PLUG, 1/8-28
3 185 13 0 KIT, PISTON & SPRING
1 . . . . . . 1 O-RING, Engine Seal
2 . . . . . . 3 SHCS, M6 - 1 x 25
4 . . . . . . 1 O-RING, Housing Seal
38 . . . . . . 3 RETAINER, Piston Spring
3 . . . . . . 3 PISTON, Dia. 15 x 65
40 . . . . . . 3 SPRING, Piston Return
41 B5 52 0 KIT, O-RING/SEAL 2000
1 . . . . . . 1 O-RING, Engine Seal
2 . . . . . . 3 SHCS, M6 - 1 x 25
4 . . . . . . 1 O-RING, Housing Seal
6 . . . . . . 3 SEAL, Oil Piston
11 . . . . . . 4 SHCS, M6-1.0 x 35
21 . . . . . . 2 O-RING, Venturi & Seat, Black
25 . . . . . . 1 O-RING, Unloader Cap
28 . . . . . . 1 O-RING, Venturi, Yellow
32 . . . . . . 3 O-RING, Check Valve
42 . . . . . . 3 SEAL, Double-Lip
43 . . . . . . 1 O-RING, High Pressure
Transfer
44 . . . . . . 3 O-RING, Outlet CV Cap
45 . . . . . . 3 O-RING, Check Valve, White
Item numbers 12, 17, 23, 31, 34, 37, and 41 are service kits
and include all parts shown within the box. Certain parts may
only be available as components of a kit.

LIMITED PRESSURE WASHER WARRANTY
GENERAC PORTABLE PRODUCTS (hereafter referred to as the COMPANY) warrants to the original retail
purchaser the pressure washer manufactured by the COMPANY to be free from defects in material and
workmanship for the period(s) set forth below from the date of original purchase. This warranty is not transferable.
The term original purchaser means the person for whom the pressure washer is originally purchased.
Warranty Schedules
Electric Power Washer 1 year (does not apply to commercial or rental applications)
CONSUMER* COMMERCIAL*
All Other Engine-driven Engine: Warranted solely by Warranted solely by
Engine Manufacturer Engine Manufacturer
Pump:1 year 90 days
* NOTE: For the purpose of this warranty, consumer use means personal residential household use by
original purchaser. Commercial use means all other uses, including rental, construction, commercial
and income producing purposes. Once a pressure washer has experienced commercial use, it shall
thereafter be considered a commercial use pressure washer for the purposes of this warranty.
During said warranty period, the COMPANY will, at its option, repair or replace any part which, upon examination
by the COMPANY or COMPANY-authorized dealers, is found to be defective under normal use and service**. All
transportation costs under warranty, including return to the factory if necessary, are to be borne by the purchaser
and prepaid by the purchaser.
** NORMAL WEAR: As with all mechanical devices, pressure washers need periodic parts service and
replacement to perform well. This warranty does not cover repair when normal use has exhausted the life
of a part or pressure washer pump.
This warranty does not include: Used products and demonstration equipment. Parts, such as GUNS, HOSES,
WANDS, NOZZLES or other wear items such as quick couplers, oil, gauges, belts, o-rings, filters, pump packing,
etc. Pumps which have been run without water supplied. Damage or malfunctions resulting from accidents,
abuse, modifications, alterations, or improper servicing. Freezing or chemical deterioration. Normal maintenance
such as adjustments, fuel system cleaning and obstruction (due to chemical, dirt, carbon or lime, etc.).
THIS WARRANTY IS IN PLACE OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED,
SPECIFICALLY, THE COMPANY MAKES NO OTHER WARRANTIES AS TO MERCHANTABILITY
OR FITNESS FOR A PARTICULAR PURPOSE. THE DURATION OF ANY IMPLIED WARRANTIES
WHICH CANNOT BE DISCLAIMED IS LIMITED TO THE TIME PERIOD AS SPECIFIED IN THE
EXPRESS WARRANTY. LIABILITY FOR CONSEQUENTIAL, INCIDENTAL, OR SPECIAL
DAMAGES UNDER ANY AND ALL WARRANTIES IS EXCLUDED, EVEN IF SUCH DAMAGES ARE
A DIRECT RESULT OF THE COMPANY'S NEGLIGENCE. THE COMPANY ALSO DISCLAIMS ANY
RESPONSIBILITY FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES, SUCH AS THE LOSS OF
TIME OR THE USE OF THE POWER EQUIPMENT, OR ANY COMMERCIAL LOSS DUE TO THE
FAILURE OF THE EQUIPMENT. ANY IMPLIED WARRANTIES ARE LIMITED TO THE DURATION
OF THIS WRITTEN WARRANTY.
Some states do not allow limitations on how long an implied warranty lasts, or the exclusion or limitation of
incidental or consequential damages, so the above limitations or exclusions may not apply to you. This warranty
gives you specific legal rights and you may also have other rights, which vary from state to state.
For service, see your nearest COMPANY-authorized warranty service facility or call 1-877-544-0 82. Warranty
service can be performed only by a COMPANY-authorized service facility. This warranty will not apply to service at
any other facility. At the time of requesting warranty service, evidence of original purchase date must be
presented.
Generac Portable Products
Jefferson, Wisconsin U.S. A.