1900PSI
Owner’s Manual / Manual del Propietario / Manuel de l'Utilisateur
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Model No. 1694-1,2 (1900 PSI Pressure Washer) Manual No. 192464GS Revision 4 (12/18/2003)
1900PSI
BRIGGS & STRATTON POWER PRODUCTS GROUP, LLC
JEFFERSON,WISCONSIN, U.S.A.
Generac Portable Products 1900 PSI Pressure Washer
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TABLE OF CONTENTS
Safety Rules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Know Your Pressure Washer. . . . . . . . . . . . . . . . . . . . . . . . 5
Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10
Product Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-13
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-17
Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
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, we reserve
the right to change, alter or otherwise improve the product
and this document at any time without prior notice.
SAFETY RULES
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.
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.
Hazard Symbols and Meanings
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
Fire
Explosion
Toxic Fumes
Hot Surface
Moving Parts
Electrical Shock
Slippery Surface
Fall
Kickback
Flying Objects
Fluid Injection
Generac Portable Products 1900 PSI Pressure Washer
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• Keep water spray away from electric wiring or fatal electric
shock may result.
Spray contact with electrical wiring can result in
electrocution.
WARNING
• 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.
• Operate this unit on a stable surface.
• The cleaning area should have adequate slopes and drainage to
reduce the possibility of a fall due to slippery surfaces.
• Be extremely careful if you must use the pressure washer from
a ladder, scaffolding or any other relatively unstable location.
• Firmly grasp spray gun with both hands when using high
pressure spray to avoid injury if gun kicks back.
Use of pressure washer can create puddles and
slippery surfaces.
High pressure spray could cause you to fall if
you are too close to the cleaning surface.
WARNING
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 fuel 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 fuel
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 FUEL 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 fuel vapors.
Fuel and its vapors are extremely flammable and
explosive.
Fire or explosion can cause severe burns or
death.
WARNING
• NEVER aim spray gun at people, animals or plants.
• DO NOT allow CHILDREN to operate pressure washer.
• NEVER repair high pressure hose. Replace it.
• Keep high pressure hose connected to pump and spray gun
while system is pressurized.
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
Generac Portable Products 1900 PSI Pressure Washer
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• DO NOT tamper with governed speed.
• DO NOT operate pressure washer above rated pressure.
Excessively high or low operating speeds increase risk
of injury and damage to pressure washer.
CAUTION
WHEN ADJUSTING OR MAKING REPAIRS TO YOUR
PRESSURE WASHER
• Disconnect spark plug wire from spark plug and place wire
where it cannot contact spark plug.
Unintentional sparking can result in fire or
electric shock.
WARNING
• DO NOT point spray gun at glass when in jet spray mode.
• NEVER aim spray gun at plants.
High pressure spray may damage fragile items including
glass.
CAUTION
• DO NOT wear loose clothing, jewelry or anything that may
be caught in the starter or other rotating parts.
• Tie up long hair and remove jewelry.
Starter and other rotating parts can entangle
hands, hair, clothing,or accessories.
WARNING
• Always wear eye protection when using this equipment or in
vicinity of where equipment is in use.
High pressure spray can cause paint chips or
other particles to become airborne.
WARNING
• DO NOT secure spray gun in open position.
• DO NOT leave spray gun unattended while machine is
running.
• NEVER use a spray gun which does not have a trigger lock or
trigger guard in place and in working order.
• Always be certain spray gun,nozzles and accessories are
correctly attached.
A pressure washer produces a high pressure spray
which increases risk of injury and damage to unit.
CAUTION
• If you have questions about intended use, ask dealer or
contact Briggs & Stratton Power Products.
• NEVER operate units with broken or missing parts, or
without protective housing or covers.
• DO NOT by–pass any safety device on this machine.
• Before starting pressure washer in cold weather, check all
parts of the equipment to be sure ice has not formed there.
• NEVER move machine by pulling on high pressure hose. Use
handle provided on unit.
• Check 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 pressure
washer.
• This equipment is designed to be used with Briggs & Stratton
Power Products authorized parts ONLY. If equipment is used
with parts that DO NOT comply with minimum specifications,
user assumes all risks and liabilities.
Improper treatment of pressure washer can damage it
and shorten its life.
CAUTION
• DO NOT touch hot surfaces.
• Stay clear of exhaust gases.
• Allow equipment to cool before touching.
Running engines produce heat and hot exhaust
gases.Temperature of muffler and nearby areas
can reach or exceed 150°F (65°C).
Fire or severe burns can occur.
WARNING
Generac Portable Products 1900 PSI Pressure Washer
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KNOW YOUR PRESSURE WASHER
Read this owner’s manual and safety rules before operating your pressure washer.
Compare the illustrations with your pressure washer to familiarize yourself with the locations of various controls and
adjustments. Save this manual for future reference.
Air Cleaner — Dry type filter element limits the amount
of dirt and dust that gets in the engine.
Automatic Cool Down System — Cycles water
through pump when water reaches 125°-155°F. Warm
water will discharge from pump onto ground.This
system prevents internal pump damage.
Chemical Injection Siphon/Filter — Use to siphon
detergent or other pressure washer chemicals into the low
pressure stream.
Fuel Tank — Fill tank with regular unleaded gasoline.
High Pressure Outlet — Connection for high pressure
hose.
Primer Bulb — Prepares a cold engine for starting.
Pump — Develops high water pressure.
Recoil Starter — Used for starting the engine manually.
Water Inlet — Connection for garden hose.
Air Cleaner
Primer Bulb
Fuel Tank
Water Inlet
Pump equipped with
Automatic Cool Down
System
Recoil Starter
High Pressure Outlet
Chemical Injection
Siphon/Filter
Generac Portable Products 1900 PSI Pressure Washer
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ASSEMBLY
IMPORTANT: Read entire owner’s manual before you
attempt to assemble or operate your new pressure washer.
Remove Pressure Washer From
Carton
• Remove the parts bag, accessories, and inserts included
with pressure washer.
• Slice two corners at the end of carton from top to
bottom so the panel can be folded down flat.
• Remove pressure washer from carton.
Carton Contents
Items in the carton include:
• Main Unit
• Goggles
• High Pressure Hose
• Spray Gun
• Nozzle Extension
• Oil Bottle
• Parts Bag (which includes the following):
• Maintenance Kit
• Owner’s Manual
• Engine Manual
• Owner’s Registration Card
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
To prepare your pressure washer for operation,you
will need to perform these tasks:
1. Fill out and send in registration card.
2. Add oil to engine crankcase.
3. Add fuel to fuel tank.
4. Connect high pressure hose to spray gun and pump.
5. Connect water supply to pump.
6. Attach nozzle extension to spray gun.
Add Engine Oil and Fuel
• Place pressure washer on a level surface.
• Refer to engine owner’s manual and follow oil and fuel
recommendations and instructions.
NOTE: Check oil often during engine break–in. Refer to
engine owner’s manual for recommendations.
CAUTION
• Refer to engine manual for oil and fuel fill information.
• Damage to equipment resulting from failure to follow this
instruction will void warranty.
Any attempt to crank or start the engine before it has
been properly filled with the recommended oil will result
in equipment failure.
Generac Portable Products 1900 PSI Pressure Washer
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Connect Hose and Water Supply to
Pump
IMPORTANT: To avoid pump damage, you must assemble
the nozzle extension to the spray gun and attach all hoses
before you start the engine.
1. Uncoil high pressure hose and attach one end of hose to
base of spray gun (Figure 1).Tighten by hand.
2. Attach other end of high pressure hose to high pressure
outlet on pump (Figure 2).Tighten by hand.
3. Before connecting garden hose to water inlet, inspect
inlet screen (Figure 3). Clean screen if it contains debris
or replace if damaged. DO NOT RUN PRESSURE
WASHER IF SCREEN IS DAMAGED.
4. Run water through garden hose for 30 seconds to clean
out any debris.
IMPORTANT: DO NOT siphon standing water for water
supply. Use ONLY cold water (less than 100°F).
5. Connect garden hose (not to exceed 50 feet in length)
to water inlet.Tighten by hand (Figure 3).
6. Turn ON water and squeeze trigger on gun to purge
pump system of air and impurities.
Checklist Before Starting Engine
Review the unit’s assembly to ensure you have performed
all of the following.
1. Check that oil has been added to proper level in
engine crankcase.
2. Add proper gasoline to fuel tank.
3. Check for properly tightened hose connections (high
pressure and water supply) and there are no kinks,
cuts, or damage to e high pressure hose.
4. Provide a proper water supply at an adequate flow.
5. Be sure to read "Safety Rules" and "How To Use
Pressure Washer" before using pressure washer.
Connect high
pressure hose here
Figure 1 — Connect High Pressure Hose to Spray Gun
Figure 2 — Connect High Pressure Hose to Pump
Inspect inlet
screen, DO NOT
use if damaged;
clean if dirty.
Figure 3 — Connect the Garden Hose to Water Inlet
• Always wear eye protection when using this equipment or in
vicinity of where equipment is in use.
• Before starting the pressure washer, be sure you are wearing
adequate eye protection.
High pressure spray can cause paint chips or
other particles to become airborne.
WARNING
CAUTION
• Damage to equipment resulting from failure to follow this
instruction will void warranty.
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.
Generac Portable Products 1900 PSI Pressure Washer
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HOW TO USE 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 Pressure Washer
To start your pressure washer for the first time, follow
these instructions step-by-step.This starting information
also applies if you have let the pressure washer sit idle for
at least a day.
1. Place pressure washer near an outside water source
capable of supplying water at a flow rate greater than
3.0 gallons per minute and no less than 20 PSI at
pressure washer end of garden hose.
2. Check that high pressure hose is tightly connected to
spray gun and to pump. See “Preparing Pressure
Washer for Use” for illustrations.
3. Make sure unit is in level position.
4. Connect garden hose to water inlet on pressure
washer pump. Turn ON the water.
5. Attach adjustable nozzle extension to spray gun
(Figure 4).Tighten by hand.
6. Position nozzle in low pressure mode (see “How To
Use Adjustable Nozzle”) and squeeze trigger on spray
gun to relieve air pressure caused by turning ON
water.Water will flow out of spray gun in thin stream.
Continue to hold trigger until steady stream of water
occurs and no air remains in system.This will make it
easier to pull start the engine. Release trigger.
7. Engage safety latch to spray gun trigger (Figure 5).
8. Start engine according to instructions given in engine
owner’s manual.
NOTE:Always keep the throttle lever in the “Fast”
position when operating the pressure washer.
How To Stop Pressure Washer
• Turn engine off according to instructions given in the
engine owner’s manual.
• Squeeze trigger on the spray gun to relieve
pressure in the hose.
NOTE:A small amount of water will squirt out when
pressure is released.
Figure 4 — Connect Nozzle Extension to Spray Gun
Safety Latch
Figure 5 — Spray Gun with Safety Latch Engaged
CAUTION
• Always use handle to lift equipment.
• NEVER pull on hoses to move equipment.
Avoid fire from equipment tip over.
CAUTION
• Squeeze trigger on spray gun each time recoil starter is
pulled and engine fails to start.
Avoid injury from kickback.
CAUTION
• Damage to equipment resulting from failure to follow this
instruction will void warranty.
DO NOT run the pump without the water supply
connected and turned on.
Generac Portable Products 1900 PSI Pressure Washer
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How To Use 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 to
apply detergent or other cleaning chemicals.
1. Slide nozzle forward to adjust spray to low pressure
mode (Figure 6). Slide nozzle backward to achieve high
pressure.
2. Point nozzle towards a firm surface and press trigger
to test spray pattern (Figure 7).
3. Twisting nozzle adjusts spray pattern from a narrow
pattern to a fan pattern (Figure 8).
4. For most effective cleaning, keep spray nozzle between
8 to 24 inches away from cleaning surface.
5. If spray nozzle is held too close to surface, especially
using high pressure mode, damage to surface may
occur.
6. DO NOT get closer than 6 inches when cleaning tires.
Applying Detergent With Adjustable
Nozzle
IMPORTANT: Use soaps designed specifically for
pressure washers. Household detergents could damage
the pump.
To apply detergent, follow these steps:
1. Review adjustable nozzle use.
2. Prepare detergent solution as required by job.
3. Place filter end of chemical injection hose into detergent
container.
Slide nozzle backward
for High Pressure
Mode
Slide nozzle forward for low
pressure mode and
detergent application
Figure 6 — Adjusting Nozzle for Pressure
Figure 7 — Testing the Spray Pattern
Figure 8 — Adjusting the Nozzle for Spray Pattern
Rotate nozzle
counterclockwise for fan
spray pattern
Rotate nozzle clockwise
for narrow spray pattern
CAUTION
• Starting the engine without all the hoses connected and
without the water turned ON will damage the pump.
• Damage to equipment resulting from failure to follow this
instruction will void warranty.
You must attach all hoses before you start the engine.
• NEVER adjust spray pattern when spraying.
• NEVER put hands in front of nozzle to adjust spray pattern.
A pressure washer produces a high pressure spray
which increases risk of injury and damage to unit.
CAUTION
Generac Portable Products 1900 PSI Pressure Washer
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4. Slide adjustable nozzle forward to low pressure mode.
Detergent cannot be applied with nozzle in high pressure
position.
5. Make sure garden hose is connected to water inlet.
Check that high pressure hose is connected to spray gun
and pump; start engine.
6. Apply detergent to a dry surface, starting at lower
portion of area to be washed and work upward, using
long, even, overlapping strokes.
7. Allow detergent to "soak in" for 3-5 minutes before
washing and rinsing. Reapply as needed to prevent
surface from drying. DO NOT allow detergent to dry on
(prevents streaking).
IMPORTANT: You must flush the chemical injection
system after each use by placing the filter into a bucket of
clean water, then run the pressure washer in low pressure
for 1-2 minutes.
Pressure Washer Rinsing
For Rinsing:
1. Slide nozzle backward to high pressure, press trigger and
wait for detergent to clear.
NOTE:You can also stop detergent from flowing by simply
removing chemical injection hose from bottle.
2. Keep spray gun a safe distance from surface.
3. Apply high pressure spray to a small area, then check
surface for damage. If no damage is found, it is okay to
continue cleaning.
4. Start at top of area to be rinsed, working down with
same overlapping strokes as 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 temperatures
above 125°F.The system engages to cool the pump by
discharging the warm water onto the ground.
• Keep spray nozzle between 8 to 24 inches away from cleaning
surface.
• Operate this unit on a stable surface.
• Be extremely careful if you must use the pressure washer from
a ladder, scaffolding or any other relatively unstable location.
• Firmly grasp spray gun with both hands when using high
pressure spray to avoid injury if gun kicks back.
High pressure spray could cause you to fall if
you are too close to the cleaning surface.
WARNING
CAUTION
• When inserting the filter into a detergent solution bottle,
route the tube so as to keep it from inadvertently contacting
the hot muffler.
Keep the chemical injection tube from coming in contact
with the hot muffler.
Generac Portable Products 1900 PSI Pressure Washer
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SPECIFICATIONS
Outlet Pressure . . . . . 1900 psi
Flow Rate . . . . . . . . . . 2.0 gallons per minute (gpm)
Detergent . . . . . . . . . . Use detergent approved for
pressure washers
Water Supply . . . . . . Not to Exceed 100°F
Temperature
Automatic Cool . . . . Will cycle when water
Down System reaches 125°-155°F
Shipping Weight . . . .46 lbs.
GENERAL MAINTENANCE
RECOMMENDATIONS
The pressure washer warranty does not cover items that
have been subjected to operator abuse or negligence.To
receive full value from the warranty, the operator must
maintain the pressure washer as instructed in this manual.
• Some adjustments will need to be made periodically to
properly maintain your pressure washer.
• All maintenance in this manual and the engine owner’s
manual should be made at least once each season.
• Once a year you should check the spray gun and
adjustable nozzle extension assembly for wear.Also clean
or replace the spark plug and clean or replace the engine
air filter. Please refer to engine owner’s manual for more
details.
Before Each Use
1. Check engine oil level.
2. Check water inlet screen for damage.
3. Check in-line filter for damage.
4. Check high pressure hose for leaks.
5. Check chemical injection hose and filter for damage.
6. Check spray gun and adjustable nozzle extension
assembly for leaks.
7. 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.
Check Chemical Injection Hose
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.
Check Gun and Adjustable Nozzle
Extension
Examine the hose connection to the spray gun and make
sure it is secure.Test the trigger by pressing it and making
sure it “springs back” into place when you release it. Put
the safety latch in the ON position and test the trigger.You
should not be able to press the trigger.
Purge Pump of Air and
Contaminants
To remove air from the pump, follow these steps:
1. Set up pressure washer as described in “Preparing
Pressure Washer For Use”. Connect water supply and
turn water on.
• NEVER repair high pressure hose. Replace it.
• Replacement hose rating MUST exceed maximum pressure
rating of unit.
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
Generac Portable Products 1900 PSI Pressure Washer
12
2. Pull spray gun trigger and hold.
3. When water stream is steady and constant, engage safety
latch.
To remove contaminants from the pump, follow
these steps:
1. Set up pressure washer as described in “Preparing
Pressure Washer For Use”. Connect water supply and
turn water on.
2. Remove nozzle extension from spray gun.
3. Start engine according to instructions in engine owner’s
manual.
4. Squeeze spray gun trigger and hold.
5. When water stream is steady and constant, engage safety
latch and reattach nozzle extension.
Check In-Line Filter
Refer to Figure 9 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 screen, spray gun, and adjustable nozzle extension
with clean water to clear debris.
2. If screen is damaged, o-ring kit contains a replacement
in-line filter screen and o-ring. If undamaged, reuse
screen.
3. Place in-line filter screen into threaded end of nozzle
extension. Direction does not matter. Push screen in
with eraser end of pencil until it rests flat at bottom of
opening.Take care to not bend screen.
4. Place o-ring into threaded end of nozzle extension. Push
o-ring snugly against in-line filter screen.
5. Assemble nozzle extension to spray gun,as described
earlier in this manual.
Cleaning Chemical Injection Hose
If you used the chemical injection hose, you must flush it
with clean water before stopping the engine.
1. Place chemical injection hose in a bucket full of clean
water.
2. Slide adjustable nozzle forward to low pressure
position. Flush for 1-2 minutes.
3. Shut off 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
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 orifice
clogged or restricted with foreign materials, such as dirt,
etc.To correct the problem, immediately clean the orifice
using the tools included with your pressure washer and
follow these instructions:
1. Shut off engine and turn off water supply.
2. Detach nozzle extension from spray gun.Twist nozzle
clockwise to stream position. Using 2mm (5/64) allen
wrench, remove orifice from end of nozzle extension
(Figure 10).
3. Remove in-line filter from other end of nozzle extension.
4. Use wire (or small paper clip) to free any foreign
material clogging or restricting orifice (Figure 10).
Nozzle Extension
Filter Screen
O-ring
Figure 9 — Clean In-Line Filter
Orifice
Figure 10 — Removing and Cleaning Orifice
Generac Portable Products 1900 PSI Pressure Washer
13
5. Using garden hose, remove additional debris by back
flushing water through nozzle extension (Figure 11). Back
flush between 30 to 60 seconds.Turn adjustable nozzle
extension to stream spray and move nozzle from low to
high while flushing.
6. Reinstall orifice and in-line filter into nozzle extension.
Do Not overtighten orifice with allen wrench.
7. Reconnect nozzle extension to spray gun.
8. Reconnect water supply, turn on water, and start engine.
9. Test pressure washer by operating with nozzle in high
and low positions.
O–Ring Maintenance
Through the normal operation of your pressure washer,
o–rings are used to keep the connections of the hoses and
spray gun tight and leak–free.These o-rings 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
you will not use all of the parts in the kit.
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 every 50 hours or once yearly, whichever
occurs first.
NOTE:You must purchase a premeasured bottle of pump
oil, item number 190586GS, by contacting the nearest
authorized service center.
Change pump oil as follows:
1. Drain engine oil and fuel from pressure washer.
2. Use 8mm allen wrench to remove black pump oil cap,
found between high pressure outlet and garden hose
inlet (Figure 12).
3. Tilt pressure washer to drain oil into an approved
container until it drips slowly from the pump.
4. Tilt pressure washer in opposite direction and empty
premeasured pump oil bottle into same opening (a small
funnel may be helpful).
5. Install black pump oil cap and tighten firmly.
6. Set pressure washer in upright position.Add fuel and
engine oil.
ENGINE MAINTENANCE
See the engine owner’s manual for instructions on how to
properly maintain the engine.
CAUTION! KEEP OUT OF REACH OF
CHILDREN. DON'T POLLUTE. CONSERVE
RESOURCES. RETURN USED OIL TO
COLLECTION CENTERS.
Figure 11 — Backflushing the Nozzle
Oil Cap
Figure 12 - Changing Pump Oil
• Used motor oil has been shown to cause skin cancer in
certain laboratory animals.
• Thoroughly wash exposed areas with soap and water.
Avoid prolonged or repeated skin contact with used
motor oil.
CAUTION
14
Generac Portable Products 1900 PSI Pressure Washer
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 chemical injection hose by placing filter into pail of
clean water while running pressure washer in low
pressure mode (adjustable nozzle in forward position).
Flush for one to two minutes.
2. Shut off engine and let it cool, then remove high pressure
and garden hoses. Disconnect spark plug wire from spark
plug.
3. Empty pump of all pumped liquids by pulling recoil handle
about 6 times.This should remove most of the liquid in
pump.
4. Use PumpSaver to prevent corrosion build up and
freezing of pump.
5. Store unit in a clean, dry area.
Protecting the Pump
To protect the pump from damage caused by mineral
deposits or freezing, use PumpSaver to treat pump.This
prevents freeze damage and lubricates pistons and seals.
NOTE: PumpSaver is available as an optional accessory. It is
not included with the pressure washer. Contact the nearest
authorized service center to purchase 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.
CAUTION
• Failure to do so will permanently damage your pump and
render your unit inoperable.
• Freeze damage is not covered under warranty.
You must protect your unit from freezing temperatures.
• Always wear eye protection when using PumpSaver.
Read and follow all cautions and warnings on the
PumpSaver can label.
CAUTION
15
Generac Portable Products 1900 PSI Pressure Washer
TROUBLESHOOTING
Problem
Pump has following problems:
failure to produce pressure,
erratic pressure, chattering, loss
of pressure, low water volume.
Detergent fails to mix with spray.
Engine runs good at no-load but
"bogs" when load is added.
Engine shuts down during
operation.
Cause
1. Nozzle in low pressure mode.
2. Water inlet is blocked.
3. Inadequate water supply.
4. Inlet hose is kinked or leaking.
5. Clogged inlet hose strainer.
6. Water supply is over 100°F.
7. High pressure hose is blocked or
leaks.
8. Gun leaks.
9. Nozzle is obstructed.
10.Pump is faulty.
1. Detergent siphoning tube is not
submerged.
2. Chemical filter is clogged.
3. Dirty in-line filter.
4. Nozzle is in high pressure mode.
Engine speed is too slow.
Out of gasoline.
Correction
1. Pull nozzle backward for high
pressure mode.
2. Clear inlet.
3. Provide adequate water flow.
4. Straighten inlet hose, patch leak.
5. Check and clean inlet hose
strainer.
6. Provide cooler water supply.
7. Clear blocks in outlet hose.
8. Replace gun.
9. Clean nozzle.
10.Contact Briggs & Stratton Power
Products service facility.
1. Insert detergent siphoning tube
into detergent.
2. Clean or replace filter/detergent
siphoning tube.
3. See "Check In-Line Filter".
4. Push nozzle forward for low
pressure mode.
Move throttle control to FAST
position. If engine still "bogs down",
contact engine manufacturer.
Fill fuel tank.
Generac Portable Products 1900 PSI Pressure Washer
16
EXPLODED VIEW AND PARTS LIST – MAIN UNIT
Item Part # Description
1 M190259GS BASE
2 192308GS KIT, Pump/Engine Mounting Hardware
3 190249GS HOSE
4 193482GS GUN
5 193609DGS ORIFICE
6 193735DGS WAND,Adjustable Nozzle
7 23139GS KEY
8 194216GS ASSY, Pump (see page 17)
900 NSP ENGINE
Items Not Illustrated
192464GS MANUAL, Owner’s
MS5373 MANUAL, Engine
192674GS KIT, Decal
BB3061BGS BOTTLE, Oil
191922GS KIT, O-RING MAINT & NZZL CLNNG
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