2250PSI
The Reliable Ones
High Pressure Washer
Owner’s Manual
Problems?
Questions?
Before taking your unit
back to the store,
call the pressure washer
helpline at
1-800-270-1408
M-F 8-5 CST
This pressure
washer is
equipped with an
Automatic Cool
Down System.
See page 11 for
details.
GENERAC
This symbol points out important safety instructions, which, if not followed, could endanger the personal safety and/or property of yourself and others. Read and follow all
instructions in the manual before attempting to operate this unit.
Model No. 10421 (2250 PSI High Pressure Washer) Manual No. B2137 Revision 2 (4/13/98)
CAUTION: Disconnect spark plug wire and place wire where it cannot contact spark plug to
prevent accidental starting when setting up, transporting, adjusting or making repairs to your
high pressure washer.
2
High Pressure Washer
Generac 2250PSI High Pressure Washer
GENERAC
Engine exhaust gases contain DEADLY carbon monoxide gas.
This dangerous gas, if breathed in sufficient concentrations, can
cause unconsciousness or even death. Operate this equipment
only in the open air where adequate ventilation is available.
Gasoline is highly FLAMMABLE and its vapors are EXPLOSIVE.
Do not permit smoking, open flames, sparks or heat in the vicinity while handling gasoline. Avoid spilling gasoline on a hot engine.
Allow unit to cool for 2 minutes before refueling. Comply with all
laws regulating storage and handling of gasoline.
Locate this pressure washer in areas away from combustible
materials, combustible fumes or dust.
The high pressure equipment is designed to be used with Gen-
erac authorized parts only. If you use this equipment with parts
that do not comply with minimum specifications, the user assumes
all risks and liabilities.
Some chemicals or detergents may be harmful if inhaled or
ingested, causing severe nausea, fainting or poisoning. The harmful elements may cause property damage or severe injury.
Do not allow CHILDREN to operate the Pressure Washer at any
time.
Operate engine only at governed speed. Running the engine at
excessive speeds increases the hazard of personal injury. Do not
tamper with parts which may increase or decrease the governed
speed.
Do not wear loose clothing, jewelry or anything that may be
caught in the starter or other rotating parts.
Before starting the Pressure Washer in cold weather, check all
parts of the equipment for ice formation.
Units with broken or missing parts, or without protective housing
or covers should NEVER be operated.
The muffler and air cleaner must be installed and in good condi-
tion before operating the Pressure Washer. These components
act as spark arrestors if the engine backfires.
Check the fuel system for leaks or signs of deterioration such as
chafed or spongy hose, loose or missing clamps or damaged tank
or cap. Correct all defects before operating the Pressure Washer.
Do not spray flammable liquids.
Never aim the gun at people, animals or plants.
High pressure spray can cause paint chips or other particles to
become airborne and fly at high speeds.
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.
The high pressure stream of water that this equipment produces
can pierce skin and its underlying tissues, leading to serious
injury and possible amputation.
Always wear eye protection when you use this equipment or
when you are in the vicinity where the equipment is in use.
Never move the machine by pulling on the high pressure hose.
Use the handle provided on the top of the unit.
Always be certain the spray gun, nozzles and accessories are cor-
rectly attached.
Never use a spray gun which does not have a trigger lock or trig-
ger guard in place and in working order.
Use a respirator or mask whenever there is a chance that vapors
may be inhaled. [Read all instructions a mask to be certain the
mask will provide the necessary protection against inhaling harmful vapors.]
High pressure spray may damage fragile items including glass.
Do not point spray gun at glass when in the jet spray mode.
Keep the hose connected to machine and spray gun while the
system is pressurized. Disconnecting the hose while the unit is
pressurized is dangerous.
Hold the spray gun firmly in your hand before you start the unit.
Failure to do so could result in an injury from a whipping spray
gun. Do not leave the spray gun unattended while the machine
is running.
The cleaning area should have adequate slopes and drainage to
reduce the possibility of a fall due to slippery surfaces.
Keep water spray away from electric wiring or fatal electric shock
may result.
Do not secure gun trigger in the pull-back (open) position.
Do not by-pass any safety device on this machine.
The muffler and engine heat up during operation and remain hot
immediately after shutting it down. Avoid contact with a hot muf-
fler or engine or severe burns may occur.
Operate and store this unit on a stable surface.
The high pressure hose can develop leaks from wear, kinking,
abuse, etc. Water spraying from a leak is capable of injecting mate-
rial into skin. Inspect the hose each time before use. 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 the high pressure hose. Replace
it with another hose that meets minimum pressure rating of your
pressure washer.
The engine exhaust from this product
contains chemicals known to the State
of California to cause cancer, birth
defects, or other reproductive harm.
WWAARRNNIINNGG::
Generac 2250PSI High Pressure Washer
GENERAC
3
High Pressure Washer
CONGRATULATIONS on your purchase of a
GENERAC high pressure washer. It has been
designed, engineered and manufactured to give you
the best possible dependability and performance.
Should you experience any problem you cannot
easily remedy, please contact your nearest GENERAC Authorized Service facility, or call the 1-800
number listed on the front of this manual. We have
competent, well-trained technicians and the proper
tools to service or repair this unit.
Please read and retain this manual. The instructions
will enable you to assemble and maintain your high
pressure washer properly.
CUSTOMER
RESPONSIBILITIES
Read and observe the safety rules.
Follow regular schedule in maintaining, caring for
and using your high pressure washer.
Follow the instructions under Customer Responsi-
bilities and Storage sections of this Owner's
Manual.
PRODUCT SPECIFICATIONS
Pressure Washer Specifications
Outlet Pressure . . . . 2250 psi
Flow Rate . . . . . . . . . 2.22 gallons per minute (gpm)
Detergent Mix . . . . . . Use undiluted detergent
approved for pressure
washers
Water Supply . . . . . . Not to Exceed 140°F
Temperature
Automatic Cool . . . . Will cycle when water
Down System reaches 140°-145°F
Engine specifications
Engine Model . . . . . . Briggs & Stratton Intek
Rated Horsepower . . 6.0
Displacement . . . . . . 190cc
Spark Plug
Type . . . . . . . . RC-12YC
Set Gap To: . . 0.030 inch (0.76mm)
Gasoline Capacity . . 4.2 U.S. quarts
Oil . . . . . . . . . . . . . . . SAE 30
In the State of California a spark arrestor is required
by law (Section 4442 of the California Public
Resources Code). Other states may have similar
laws. Federal laws apply on federal lands.
NOTE: If you equip the engine of your pressure
washer with a spark arrestor muffler, the spark
arrestor must be maintained in effective working order
by the owner/operator.
You can order a spark arrestor through your
authorized Generac service facility. See Engine
Owners Manual for part number.
Model Number 1042-1
Serial Number
Date of Purchase
The model and serial numbers will be found on
a decal attached to the pressure washer. You
should record both serial number and date of
purchase and keep in a safe place for future
reference.
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High Pressure Washer
KNOW YOUR PRESSURE WASHER
Read this owners 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.
Generac 2250PSI High Pressure Washer
GENERAC
Pump Develops high pressure.
Recoil Starter Used for starting the engine man-
ually.
Spray Gun Controls the application of water onto
cleaning surface with trigger device. Includes safety
latch.
Adjustable Nozzle Extension You must attach
this to the spray gun to provide high pressure
stream. The adjustable nozzle allows you to adjust
the spray pattern which, in turn, adjusts the force of
spray.
Dual Element Air Filter Filter element limits the
amount of dirt and dust that gets in the engine.
Water Inlet Connection for garden hose.
High Pressure Outlet Connection for high pres-
sure hose.
High Pressure Hose Connect one end to water
pump and the other end to spray gun.
Goggles Always use the enclosed goggles or
other eye protection when running your pressure
washer.
Automatic Cool Down System Cycles water
through pump when water reaches 140°-145°F.
Warm water will discharge from pump onto
ground. This system prevents internal pump
damage.
Pressure Control Knob Varies the pressure of
the high pressure spray.
Oil Fill Cap Fill engine with oil here.
Gas Tank Fill tank with regular unleaded
gasoline.
Spray Gun
Adjustable Nozzle
Extension
High Pressure Hose
Recoil Starter
Goggles
Gas Tank
Water Inlet
Pressure Control Knob
Pump equipped with
Automatic Cool Down System
High Pressure Outlet
Dual Element Air Filter
Oil Fill Cap
High Pressure Washer
5
Read entire owners manual before you attempt to
assemble or operate your new pressure washer.
Your new pressure washer has been assembled at
the factory with the exception of those parts left
unassembled for shipping purposes.
REMOVE PRESSURE
WASHER FROM CARTON
Remove parts box included with pressure washer.
Slice two corners at guide handle 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
Parts Box (which includes the following):
Wireform
Goggles
Nozzle Cleaning Kit
Owners Manual
Engine Manual
Spray Gun
Nozzle Extension
High Pressure Hose
Handle
Parts Bag (which includes the following):
2 carriage bolts
2 knobs
If any of the above parts are missing or damaged, call
the pressure washer helpline at 18002701408.
PREPARING THE PRESSURE
WASHER FOR USE
If you have any problems with the assembly of your
pressure washer or if parts are missing or damaged,
call the Pressure Washer Helpline at 1-800-270-1408.
To prepare your pressure washer for operation you
will need to perform these tasks:
Attach the handle and attach the wire form that
holds the high pressure hose and spray gun.
Connect the high pressure hose to the spray gun
and the pump and connect water supply to the
pump.
Add oil to engine crankcase.
Add fuel to fuel tank.
Attach the Handle
Place the top of the handle onto the bottom of the
handle already connected to the main unit making
sure the holes in the top align with the holes on the
bottom (Figure 1).
Note: It may be necessary to move the handle supports from side to side in order to align the handle so
it will slide over the handle supports.
Generac 2250PSI High Pressure Washer
AA
SSSSEEMMBBLL
YY
GENERAC
Figure 1 — Attach the top of the handle to the
bottom of the handle.
Make sure the
holes on the
bottom of the
handle are
aligned with the
holes in the top
of the handle
supports
Handle
Handle
Support
Generac 2250PSI High Pressure Washer
AASSSSEEMMBBLLYY
GENERAC
6
High Pressure Washer
Insert the carriage bolts through the aligned holes
on the handle and attach the plastic knobs. Tighten
the knobs by hand (Figure 2).
Insert the wire support with the longer arm positioned
on the left. From this view (from rear of unit) the hook
should resemble a J
(Figure 3).
Add Engine Oil
IMPORTANT: Any attempt to crank or start the
engine before it has been properly serviced with the
recommended oil may result in an engine failure.
Note: When adding oil to the engine crankcase, use
only high quality detergent oil rated with API service
classification SF,SG, SH or rated SAE 30 weight.
Select the oils viscosity grade according to your
expected operating temperature. Do Not Use SAE
10W40 Oil. Do not use the upper grey oil fill cap.
Although multi-viscosity oils (5W30, 10W30, etc.)
improve starting in cold weather, these multi-viscosity
oils will result in increased oil consumption when used
above 32°F. Check your engine oil level more
frequently to avoid possible damage from running
low on oil.
Place pressure washer on a level surface.
Clean area around oil fill and remove yellow oil fill
cap (Figure 4). Do not use the upper grey oil fill
cap.
Fill with recommended oil. Oil should be full to
overflowing. (Approximately 21 ounces).
Install oil fill cap, tighten securely.
Note: Check Oil Often During Engine Breakin.
Add Gasoline
DANGER! Never fill fuel tank indoors.
Never fill fuel tank when engine is running or hot. Do not smoke when filling
fuel tank.
WARNING! Never fill fuel tank completely full. Fill tank to about 1/2" below
the bottom of the filler neck to provide
space for fuel expansion. Wipe away any
fuel spillage from engine and equipment
before starting.
DO NOT operate or refuel engine with
spark plug access hole cover removed.
Allow engine to cool 2 minutes before
refueling.
Figure 3 — Fit wire form on handle.
Figure 4 — Add oil to engine crankcase. Do not
attempt to start engine without
adding oil.
Yellow Oil
Fill Cap
Figure 2 — Insert the carriage bolt and hook
and attach the knobs.
colder 32°F warmer
5W30 SAE 30
Generac 2250PSI High Pressure Washer
GENERAC
AA
SSSSEEMMBBLL
YY
7
High Pressure Washer
The manufacturer recommends fresh, clean unleaded
automotive gasoline with a minimum of 85 octane.
Use clean fuel and store in approved, clean, cov-
ered containers. Use clean fill funnels. Never use
stale gasoline left over from last season or gasoline stored for long periods (over 30 days).
Clean area around fuel fill cap, remove cap.
(Figure 5).
Add UNLEADED regular gasoline, slowly, to fuel
tank. Use a funnel to prevent spillage.
Install fuel cap and wipe up any spilled gasoline.
Note: Some fuels, called oxygenated or reformulated
gasolines, are gasoline blended with alcohols or
ethers. Excessive amounts of these blends can
damage the fuel system or cause performance problems. If any undesirable operating systems occur, use
gasoline with a lower percentage of alcohol or ether.
Connect Hose and Water
Supply to Pump
IMPORTANT: You must assemble spray gun and
attach all hoses before you start engine. Starting
engine without all hoses connected and water supplied will damage pump.
Uncoil high pressure hose and attach one end of
hose to the base of the spray gun (Figure 6).
Tighten by hand.
Attach other end of high pressure hose to the high
pressure outlet on the pump (Figure 7). Tighten by
hand.
Before you connect your garden hose to the water
inlet, inspect the Inlet Screen (see Figure 8). Clean
the screen if it contains debris or have it replaced if
damaged. Do not run the pressure washer if the
inlet screen is damaged.
Connect garden hose to water inlet. Tighten by
hand (Figure 8).
Figure 7 — Connect high pressure hose to
pump.
Figure 6 — Connect high pressure hose
to spray gun.
Figure 5 — Add gasoline to fuel tank.
Gas Cap
Connect High Pressure
Hose Here
Connect High
Pressure Hose
Here
Generac 2250PSI High Pressure Washer
GENERAC
AASSSSEEMMBBLLYY
8
High Pressure Washer
Turn ON the water (open valve completely).
Squeeze trigger on gun to purge pump system of
air and impurities.
CAUTION: Before starting the pressure
washer, be sure you are wearing adequate eye protection.
Attach nozzle extension to spray gun. Tighten by
hand (Figure 9).
CHECKLIST BEFORE
STARTING ENGINE
If you have reached this point, look back over the
assembly to see if you have performed all of the following.
Check for properly tightened hose connections
(high pressure and water supply) and for tight connections and that there are no kinks, cuts, or
damage to the high pressure hose.
Check that oil has been added to proper level in
engine crankcase before trying to start the pressure
washer.
Add proper gasoline to fuel tank.
Provide proper water supply (not to exceed 140°F).
Be sure to read Safety Rules and Operation sec-
tions before using the pressure washer.
Figure 9 — Connect nozzle extension to spray
gun.
Figure 8 — Connect the garden hose to water
inlet and turn ON the water.
Check Screen
for Damage
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