SAVE THIS MANUAL FOR FUTURE REFERENCE
Power Washer
Owner’s Manual
012428
MODEL:________________________
SERIAL:________________________
DATE PURCHASED:______________
Register your Generac product at:
register.generac.com
1-888-922-8482
Table of Contents
Section 1: Introduction and Safety
Introduction ..................................... 1
Safety Rules .................................... 1
Safety Symbols and Meanings ........ 2
Section 2: General Information and
Setup
Know Your Power Washer .............. 3
Emissions ........................................ 3
Remove Contents from Carton ....... 3
Assembly ......................................... 3
Add Engine Oil ................................ 5
Fuel ................................................. 5
Water Supply ................................... 5
Connect Water Supply .................... 6
Connect High-Pressure Hose and
Lance .............................................. 6
Spray Gun ....................................... 6
Detergent Tank (if equipped) .......... 7
Nozzles ........................................... 7
Section 3: Operation
Operation and Use Questions ......... 8
Before Starting Engine .................... 8
Prepare Power Washer for Use ...... 8
Electric Start .................................... 9
Power Washer Start-Up .................. 9
Power Washer Shut Down ............ 10
Apply Detergent ............................ 10
Rinsing .......................................... 10
Clean Detergent Siphoning Tube .. 11
Automatic Cool Down System (Ther-
mal Relief) ..................................... 11
Optional Accessories (not included
with all models) ............................. 11
PowerDial™ Gun (if equipped) ..... 11
Section 4: Maintenance and
Troubleshooting
Maintenance ..................................13
Maintenance Schedule ..................13
Pump Oil ........................................13
Preventive Maintenance ................13
Engine Maintenance ......................14
Service Spark Plug ........................15
Maintaining the Battery ..................17
Storage ..........................................17
Troubleshooting .............................19
Notes .............................................20
(000759a)
CALIFORNIA WARNING
Can expose you to benzene, a carcinogen
and reproductive toxicant
www.P65Warnings.ca.gov.
Introduction and Safety
Owner’s Manual for Power Washer 1
Section 1: Introduction and Safety
Introduction
Read This Manual Thoroughly
If any section of this manual is not understood,
contact the nearest Independent Authorized
Service Dealer (IASD) or Generac Customer
Service at 1-888-436-3722 (1-888-
GENERAC), or visit www.generac.com for
starting, operating, and servicing procedures.
The owner is responsible for proper
maintenance and safe use of the unit.
SAVE THESE INSTRUCTIONS for future
reference. This manual contains important
instructions that must be followed during
placement, operation, and maintenance of the
unit and its components. Always supply this
manual to any individual that will use this unit,
and instruct them on how to correctly start,
operate, and stop the unit in case of
emergency.
The information in this manual is accurate
based on products produced at the time of
publication. The manufacturer reserves the
right to make technical updates, corrections,
and product revisions at any time without
notice.
Safety Rules
The manufacturer cannot anticipate every
possible circumstance that might involve a
hazard. The alerts in this manual, and on tags
and decals affixed to the unit, are not all
inclusive. If using a procedure, work method,
or operating technique that the manufacturer
does not specifically recommend, verify that it
is safe for others and does not render the
equipment unsafe.
Throughout this publication, and on tags and
decals affixed to the unit, DANGER,
WARNING, CAUTION, and NOTE blocks are
used to alert personnel to special instructions
about a particular operation that may be
hazardous if performed incorrectly or
carelessly. Observe them carefully. Alert
definitions are as follows:
NOTE: Notes contain additional information
important to a procedure and will be found
within the regular text of this manual.
These safety alerts cannot eliminate the
hazards that they indicate. Common sense
and strict compliance with the special
instructions while performing the action or
service are essential to preventing accidents.
(000100a)
Consult Manual. Read and understand manual
completely before using product. Failure to
completely understand manual and product
could result in death or serious injury.
WARNING
(000001)
DANGER
Indicates a hazardous situation which, if not avoided,
will result in death or serious injury.
(000002)
WARNING
Indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
(000003)
CAUTION
Indicates a hazardous situation which, if not avoided,
could result in minor or moderate injury.
Introduction and Safety
2 Owner’s Manual for Power Washer
Safety Symbols and Meanings
(000103)
Asphyxiation. Running engines produce carbon
monoxide, a colorless, odorless, poisonous
gas. Carbon monoxide, if not avoided, will
result in death or serious injury.
DANGER
(000104)
DANGER
Electrocution. Water contact with a power
source, if not avoided, will result in death
or serious injury.
(000105)
Explosion and Fire. Fuel and vapors are extremely
flammable and explosive. Add fuel in a well
ventilated area. Keep fire and spark away. Failure
to do so will result in death or serious injury.
DANGER
(000106b)
Fluid Injection. This machine produces
high-pressure fluid streams that can pierce
skin. Fluid injection could result in death or
serious injury.
WARNING
(000110)
WARNING
Risk of Fire. Hot surfaces could ignite
combustibles, resulting in fire. Fire could
result in death or serious injury.
Vision Loss. Eye goggles are required to be
worn when using this machine. Failure to
wear eye goggles could result in permanent
vision loss. (000101)
WARNING
(000107)
Hearing Loss. Hearing protection is
recommended when using this machine.
Failure to wear hearing protection could
result in permanant hearing loss.
WARNING
(000108)
WARNING
Hot Surfaces. When operating machine, do not
touch hot surfaces. Keep machine away from
combustibles during use. Hot surfaces could
result in severe burns or fire.
(000109)
WARNING
Risk of Fire. Verify machine has properly
cooled before installing cover and storing
machine. Hot surfaces could result in fire.
(000111)
WARNING
Moving Parts. Keep clothing, hair, and
appendages away from moving parts. Failure
to do so could result in death or serious injury.
(000112)
WARNING
Risk of Falling. Use of machine creates wet
areas and trip hazards. Be aware of work area
conditions. A fall could result in death or
serious injury.
(000114)
WARNING
Risk of Falling. Do not use this machine or any
components on elevated surfaces. Doing so
can result in a fall, serious injury, or death.
(000113)
WARNING
Recoil Hazard. Recoil could retract unexpectedly
if water pressure is not properly relieved from
pump, creating kickback. Kickback could result in
death or serious injury.
(000100a)
Consult Manual. Read and understand manual
completely before using product. Failure to
completely understand manual and product
could result in death or serious injury.
WARNING
(000115)
Moving Parts. Do not wear jewelry when
starting or operating this product. Wearing
jewelry while starting or operating this product
could result in death or serious injury.
WARNING
(000117c)
WARNING
Personal injury. Risk of fluid injection. Do not aim
spray gun at people, animals, electrical devices, or
fragile items. Keep out of reach of children. Failure to
do so could cause death or serious injury.
Personal Injury / Equipment Damage. Place wand/gun
in holster and verify that handle is locked into place
before moving. Failure to do so could result in death,
serious injury, or equipment damage.
WARNING
(000244a)
General Information and Setup
Owner’s Manual for Power Washer 3
Section 2: General Information and Setup
Know Your Power Washer
Read this manual thoroughly before assem-
bling and operating this unit. Save this manual
for future and immediate reference. Replace-
ment owner’s manuals are available at
www.generac.com.
Emissions
The United States Environmental Protection
Agency (US EPA) (and California Air
Resources Board (CARB), for engines/
equipment certified to California standards)
requires this engine/equipment to comply with
exhaust and evaporative emissions
standards. Locate the emissions compliance
decal on the engine to determine applicable
standards. See the included emissions
warranty for emissions warranty information.
Follow the maintenance specifications in this
manual to ensure the engine complies with
applicable emissions standards for the
duration of the product’s life.
Remove Contents from Carton
1. Open carton completely by cutting each
corner from top to bottom.
2. Remove and verify carton contents prior to
assembly. Carton contents should contain
one each of the following:
• Main Unit
• Handle Assembly
• High-pressure Hose
• Siphon Hose and Filter
• Spray Gun
• Battery
• Battery Charger
• Lance
• Oil
• Funnel
• Parts Bag (includes):
– Owner’s Manual
– Gun Hook and Tree Clips
– Hose Hook Wireform
– Bag of Colored Nozzles
– Spark Plug Wrench
– Accessory Nozzle Holder*
– Screw*
– Hex Key*
– *Included in units with accessory
nozzles (soap blaster or turbo noz-
zle)
3. Call Generac Customer Service at 1-888-
GENERAC (1-888-436-3722) with the unit
model and serial number for any missing
carton contents.
4. Record model, serial number, and date of
purchase on front cover of this manual.
Assembly
Call Generac Customer Service at 1-888-
GENERAC (1-888-436-3722) for any
assembly issues or concerns. Please have
model and serial number available.
1. See Figure 2-1. Place handle (A) onto
handle supports (B). Push in latch buttons
(C) and allow handle to slide into position.
Button will lock handle into place.
(000100a)
Consult Manual. Read and understand manual
completely before using product. Failure to
completely understand manual and product
could result in death or serious injury.
WARNING
(000100a)
Consult Manual. Read and understand manual
completely before using product. Failure to
completely understand manual and product
could result in death or serious injury.
WARNING
General Information and Setup
4 Owner’s Manual for Power Washer
Figure 2-1. Insert Handle
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.
2. See Figure 2-2. Install hose hook.
Figure 2-2. Install Hose Hook
3. See Figure 2-3. If accessory nozzles (soap
blaster or turbo nozzle) are included
attach accessory nozzle holder to either
side of billboard using supplied screw (A)
and hex key (B).
Figure 2-3. Accessory Nozzle Holder
4. See Figure 2-4. Install gun hook (A) on
right (back) side of handle. Secure with
tree clip (B).
Figure 2-4. Install Gun Hook
5. See Figure 2-5. Insert and snap nozzles
into spaces provided in handle.
Figure 2-5. Insert Nozzles
6. See Figure 2-6. Attach siphon tube to
siphon tube connection (A).
Figure 2-6. Attach Siphon Tube
A
BC
012442
012443
012516
A
B
A
B
012429
001621001621
012430
A
General Information and Setup
Owner’s Manual for Power Washer 5
7. See Figure 2-7 to install battery.
Figure 2-7. Install Battery
Add Engine Oil
Unit is shipped with no oil in the engine.
Add engine oil before starting. See Engine Oil
Recommendations.
1. Place power washer on a level surface.
2. Verify oil fill area is clean.
3. Remove oil fill cap/dipstick and wipe
dipstick clean.
Figure 2-8. Remove Dipstick
4. Add recommended engine oil.
NOTE: Some units have more than one oil fill
location. It is only necessary to use one oil fill
point.
5. Thread dipstick into oil filler neck. Oil level
is checked with dipstick fully inserted.
6. See Figure 2-9. Remove dipstick and verify
oil level is within safe operating range.
Figure 2-9. Safe Operating Range
7. Install oil fill cap/dipstick and hand-tighten.
Fuel
Fuel requirements are as follows:
• Clean, fresh, unleaded gasoline.
• Minimum rating of 87 octane/87 AKI (91
RON).
• Up to 10% ethanol (gasohol) is acceptable
(where available, non-ethanol fuel is
recommended).
• DO NOT use E85.
• DO NOT use a gas oil mix.
• DO NOT modify engine to run on alternate
fuels.
• Add a fuel stabilizer prior to storing.
1. Verify unit is OFF and cooled for a
minimum of two minutes prior to fueling.
2. Place unit on level ground in a well
ventilated area.
3. See Figure 2-10. Clean area around fuel
cap and remove cap slowly.
4. Slowly add recommended fuel. Do not
overfill.
Figure 2-10. Add Recommended Fuel
5. Install fuel cap.
NOTE: Allow spilled fuel to evaporate before
starting unit.
Water Supply
NOTE: DO NOT run unit without sufficient
water supply. Failure to follow water supply
requirements will void unit warranty.
Water supply must meet the following
requirements:
• DO NOT siphon standing water for the
water supply.
• Water temperature must be less than
100°F (38ºC).
• Water supply hose length must not exceed
50 ft (15.2 m).
• Water must be greater than 3.8 gallons per
minute (17.3 liters per minute) and no less
than 30 psi (206.8 kPa).
012430
000115
000116
(000105)
Explosion and Fire. Fuel and vapors are extremely
flammable and explosive. Add fuel in a well
ventilated area. Keep fire and spark away. Failure
to do so will result in death or serious injury.
DANGER
012431
General Information and Setup
6 Owner’s Manual for Power Washer
• DO NOT use a one-way valve, vacuum
breaker, or check valve in any part of the
water supply.
Connect Water Supply
1. Run water supply for 30 seconds prior to
connection to eliminate debris.
2. See Figure 2-11. Inspect inlet screen (A)
for debris. Clean screen or replace as
necessary. DO NOT run power washer if
inlet screen is damaged or missing.
Figure 2-11. Inspect Inlet Screen
3. See Figure 2-12. Connect water supply
hose to pump water inlet and hand-
tighten.
Figure 2-12. Connect Water Supply Hose
Connect High-Pressure Hose
and Lance
1. See Figure 2-13. Connect lance to spray
gun and hand-tighten.
Figure 2-13. Connect Lance
2. Place spray gun and nozzle extension into
spray gun holder.
3. Remove and discard shipping cap from
the pump water outlet.
4. See Figure 2-14. Connect high-pressure
hose to pump and hand-tighten.
Figure 2-14. Connect High-Pressure Hose
to Pump
5. See Figure 2-15. Connect high-pressure
hose to base of spray gun and hand-
tighten.
Figure 2-15. Connect High-Pressure Hose
to Spray Gun
Spray Gun
Become familiar with spray gun trigger and
locking system prior to use.
1. See Figure 2-16. With unit OFF, hold spray
gun and squeeze trigger to learn how
trigger mechanism and locking system can
be activated and deactivated.
Figure 2-16. Spray Gun (typical)
2. Turn ON the water, and squeeze the
trigger to purge the pump system of air.
001563
A
000119
000120
000121
000122
000123
General Information and Setup
Owner’s Manual for Power Washer 7
Detergent Tank (if equipped)
Power washer is shipped with siphoning tube
and cap.
1. See Figure 2-17. Insert siphoning tube
through hole in cap.
Figure 2-17. Siphoning Tube and Cap
2. Insert siphoning tube into detergent and
snap siphoning tube cap onto detergent
tank.
Nozzles
1. Select correct nozzle for task.
2. See Figure 2-18. Pull back quick–connect
collar and install nozzle.
Figure 2-18. Insert Nozzle
3. Release quick-connect collar to secure
nozzle.
4. Verify nozzle is locked in place.
Blast Pressure Nozzle (Red)
MAXIMUM - Higher pressure and lower flow
for stubborn or hard to reach surface such as
second story surfaces, paint removal, oil
stains, rust removal or other stubborn
substances (tar, gum, grease, wax, etc.).
Clean Pressure Nozzle (Green)
GENERAL - Medium pressure and medium
flow for most all purpose cleaning such as
home siding, brick patios, wood decks,
driveways and sidewalks, garage floors, etc.
Wash Pressure Nozzle (White)
DELICATE - Lower pressure and higher flow
for gentle cleaning of cars/trucks, boats, RV’s,
patio furniture, lawn equipment, etc.
Detergent Nozzle (Black)
DETERGENT ONLY (BLACK), Only use
power washer safe detergents/soaps to help
break down stubborn dirt and grime on a
variety of surfaces.
001487
000
12
5
001396
001398
001399
001400
Operation
8 Owner’s Manual for Power Washer
Section 3: Operation
Operation and Use Questions
Call Generac Customer Service at 1-888-
GENERAC (1-888-436-3722) with questions
or concerns about unit operation and
maintenance.
Before Starting Engine
Unit is shipped with no oil in the
crankcase. Add engine oil before starting.
See Engine Oil Recommendations
1. Verify engine oil level is correct.
2. Verify fresh fuel level is correct.
3. Verify all fittings and couplers are correctly
secured.
4. Verify sufficient water supply is correctly
connected.
5. Verify thermal relief valve is rotated and
open to ground.
6. Verify unit is secure on level ground, with
correct clearance and is in a well
ventilated area.
NOTE: The Lithium-ion battery comes partially
charged from the factory. Some batteries may
not have enough energy to start the engine
initially. Charge the battery fully before the
initial use. To charge the battery, see
Maintaining the Battery.
Prepare Power Washer for Use
1. Place unit on level ground, within the
specified clearance required.
2. Connect appropriate water supply.
Power Washer Placement for Use
It is a violation of California Public Resource
Code, Section 4442, to use or operate the
engine on any forest-covered, brush-covered,
or grass-covered land unless the exhaust
system is equipped with a spark arrestor, as
defined in Section 4442, maintained in
effective working order. Other states or federal
jurisdictions may have similar laws.
Only operate power washer outdoors in a well
ventilated area. Never operate power washer
indoors, or in a confined space. Be aware of
building openings and ventilation systems
where exhaust may enter during use.
• Verify power washer is placed on level
ground to avoid tipping during operation.
• Only use the unit outdoors. Verify exhaust
gas does not enter a confined area through
windows, doors, or ventilation intakes.
• See Figure 3-1. Keep at least 5 ft (1.5 m) of
clearance on all sides of power washer
including overhead from dwellings and
combustibles, when in use.
Figure 3-1. Five Feet of Minimum
Clearance
Transporting/Tipping of the Unit
Do not operate, store or transport the unit at
an angle greater than 15 degrees.
(000103)
Asphyxiation. Running engines produce carbon
monoxide, a colorless, odorless, poisonous
gas. Carbon monoxide, if not avoided, will
result in death or serious injury.
DANGER
(000110)
WARNING
Risk of Fire. Hot surfaces could ignite
combustibles, resulting in fire. Fire could
result in death or serious injury.
(000108)
WARNING
Hot Surfaces. When operating machine, do not
touch hot surfaces. Keep machine away from
combustibles during use. Hot surfaces could
result in severe burns or fire.
001643
Personal Injury / Equipment Damage. Place wand/gun
in holster and verify that handle is locked into place
before moving. Failure to do so could result in death,
serious injury, or equipment damage.
WARNING
(000244a)
Operation
Owner’s Manual for Power Washer 9
Electric Start
NOTE: The battery must be installed before
Electric Start operation. For initial battery
installation, see Assembly.
This power washer is equipped with both
electric start and recoil start capabilities. Avoid
prolonged cranking as it can damage the
engine. To extend the life of the starter, use
short starting cycles (no longer than 5
seconds). Wait 30 seconds between starting
cycles.
If the engine will not crank, the battery
temperature may be too hot. Remove battery
and allow to cool before attempting to start.
Power Washer Start-Up
NOTE: DO NOT run power washer without a
sufficient water supply turned ON. Damage to
equipment resulting from failure to follow this
instruction will void warranty.
Electric Start
1. Connect a sufficient water supply.
2. See Figure 3-2. Move fuel valve lever (A)
to ON.
Figure 3-2. Push START/STOP Button
3. For cold engine move choke lever (B) to
CLOSED.
NOTE: For warm engine, choke lever may
need to be in HALF-OPEN or OPEN position.
If engine does not start in those positions,
move choke lever to CLOSED position and
attempt engine start.
4. See Figure 3-2. Push and hold the START/
STOP (C) button for three seconds or until
button illuminates to energize starter
system.
5. Hold trigger on spray gun while pushing
the START/STOP button for one second to
start engine.
6. Release trigger on spray gun once engine
starts and move choke to OPEN.
NOTE: For electric start, the battery may
require charging for the power washer to start.
See Maintaining the Battery. If the start button
fails to start the engine, the power washer can
be started with the recoil start.
Recoil Start
1. Connect a sufficient water supply.
2. See Figure 3-2. Move fuel valve lever (A)
to ON.
3. For cold engine move choke lever (B) to
CLOSED.
NOTE: For warm engine, choke lever may
need to be in HALF-OPEN or OPEN position.
If engine does not start in those positions,
move choke lever to CLOSED position and
attempt engine start.
4. Relieve spray gun pressure.
5. Place foot on unit to secure unit from
movement when pulling recoil.
6. See Figure 3-3. Hold trigger on spray gun
while firmly grasping the recoil handle. Pull
slowly until resistance is felt. Then pull
rapidly to start engine.
Vision Loss. Eye goggles are required to be
worn when using this machine. Failure to
wear eye goggles could result in permanent
vision loss. (000101)
WARNING
(000117c)
WARNING
Personal injury. Risk of fluid injection. Do not aim
spray gun at people, animals, electrical devices, or
fragile items. Keep out of reach of children. Failure to
do so could cause death or serious injury.
(000106b)
Fluid Injection. This machine produces
high-pressure fluid streams that can pierce
skin. Fluid injection could result in death or
serious injury.
WARNING
(000110)
WARNING
Risk of Fire. Hot surfaces could ignite
combustibles, resulting in fire. Fire could
result in death or serious injury.
(000108)
WARNING
Hot Surfaces. When operating machine, do not
touch hot surfaces. Keep machine away from
combustibles during use. Hot surfaces could
result in severe burns or fire.
012435
B
A
C
Operation
10 Owner’s Manual for Power Washer
Figure 3-3. Engine Recoil
7. Return recoil handle slowly. DO NOT let
recoil snap back against recoil housing.
8. Release trigger on spray gun once engine
starts and move choke to OPEN.
After engine-start attempt, if engine fails to
run, point spray gun in safe direction, and
squeeze spray gun trigger to release high
pressure. Repeat steps 3 through 5.
Power Washer Shut Down
IMPORTANT: Spray gun traps high-pressure
water, even when engine is stopped and water
is disconnected. Always point spray gun in
safe direction, and squeeze spray gun trigger
to release high-pressure. Engage trigger lock
when not in use.
1. Release spray gun trigger.
2. Push START/STOP button for 1 second.
3. Turn water supply OFF.
4. Squeeze spray gun trigger and release
high-pressure water.
5. Engage trigger lock.
6. Remove battery and store on charger.
NOTE: See Figure 3-4. If START/STOP button
fails to shut down engine, press and hold the
emergency stop switch on side of engine for 6
seconds or until the engine stops completely.
Figure 3-4. Emergency Stop Switch
Apply Detergent
NOTE: DO NOT use caustic liquid with power
washer. Use ONLY power washer safe deter-
gents. Follow all manufacturer's instructions
on the detergent label.
Apply detergent as follows:
1. Verify black detergent nozzle is installed.
2. Open detergent tank cap, if equipped.
3. Prepare detergent solution as required by
job.
4. Depending on model, insert filter on end of
siphoning tube through hole in cap
(supplied).
NOTE: Verify siphoning tube and filter remain
fully submerged in detergent while in use.
NOTE: When inserting siphon tube into
detergent tank, route tube to prevent muffler
contact. Contact with muffler while in use can
damage detergent siphoning tube.
5. Verify black detergent nozzle is installed.
NOTE: Detergent cannot be applied with high-
pressure nozzle (White, Green or Red). Only
use black nozzle with detergent.
6. Start engine.
7. Apply detergent to a dry surface. Start at
lower portion of area to be washed and
work upward using long, even,
overlapping strokes.
IMPORTANT: Flush the detergent siphoning
system after each use. Contact an authorized
dealer or qualified service center with
questions.
Rinsing
1. Remove black detergent nozzle from
lance.
012436
(000106b)
Fluid Injection. This machine produces
high-pressure fluid streams that can pierce
skin. Fluid injection could result in death or
serious injury.
WARNING
012517
(000106b)
Fluid Injection. This machine produces
high-pressure fluid streams that can pierce
skin. Fluid injection could result in death or
serious injury.
WARNING
(000117c)
WARNING
Personal injury. Risk of fluid injection. Do not aim
spray gun at people, animals, electrical devices, or
fragile items. Keep out of reach of children. Failure to
do so could cause death or serious injury.
(000112)
WARNING
Risk of Falling. Use of machine creates wet
areas and trip hazards. Be aware of work area
conditions. A fall could result in death or
serious injury.
(000114)
WARNING
Risk of Falling. Do not use this machine or any
components on elevated surfaces. Doing so
can result in a fall, serious injury, or death.
Operation
Owner’s Manual for Power Washer 11
2. Select and install desired high-pressure
nozzle.
3. Point spray gun in safe direction and
squeeze trigger to flush remaining
detergent from system.
4. Keep spray gun a safe distance from area
you plan to spray.
5. Spray gun may kick back when using high
pressure spray. Firmly grasp spray gun
with both hands to avoid injury.
6. Apply a high-pressure spray to a small
area and then inspect surface for damage.
If no damage is found, continue rinsing.
7. Start at top of area to be rinsed, working
down with same overlapping strokes as
used for cleaning.
Clean Detergent Siphoning
Tube
Flush detergent siphoning tube after each use
before stopping the engine.
1. Place detergent siphoning tube/filter in
bucket of clean water.
2. Remove high-pressure nozzle from lance.
3. Select and install black detergent nozzle.
4. Flush for 1-2 minutes.
5. Turn engine OFF.
6. Point spray gun in a safe direction,
squeeze spray gun trigger to release
retained high water pressure. Engage
trigger lock.
After Each Use
DO NOT allow water to remain in unit for long
periods of time. Sediments or minerals can
deposit on pump parts and freeze pump.
Follow these procedures after every use:
1. Turn engine OFF.
2. Turn fuel valve OFF.
3. Turn water supply OFF.
4. Point spray gun in a safe direction, and
squeeze trigger to relieve trapped
pressure.
5. Let engine cool.
6. Disconnect hoses from spray gun and
high-pressure outlet on pump. Drain water
from hoses, spray gun, and lance. Use a
rag to wipe off components.
7. Pull recoil handle approximately six times
to remove remaining liquid from pump.
8. Store unit in a clean, dry area.
NOTE: If storing for more than 30 days, see
Storage.
Automatic Cool Down System
(Thermal Relief)
When the power washer runs for 3-5 minutes
without spray gun activation, circulating water
in pump can reach a temperature sufficient to
engage the thermal relief system. The pump is
cooled by discharging water onto ground.
Optional Accessories (not
included with all models)
Soap Blaster
Use soap or detergent for better cleaning
results.
1. Pre-rinse area with green or white nozzle.
2. Attach soap blaster nozzle to lance.
3. Add soap to tank (as directed by soap
manufacturer).
4. Connect siphon hose to pump and insert
into soap tank.
5. Select soap setting on PowerDial™ gun.
6. Apply soap starting from bottom to top of
surface area.
Turbo Nozzle
Use for cleaning hard surfaces.
1. Attach turbo nozzle to lance.
2. Select appropriate task setting on
PowerDial™ gun.
3. Start with tip 3 ft (1 m) away from work
area*.
4. Work from top to bottom of surface area.
NOTE: *Use with caution on softer surfaces.
Power Broom
Use for cleaning large surfaces like decks and
driveways.
1. Attach power broom to lance.
2. Select appropriate task setting on
PowerDial™ gun.
3. Make overlapping passes to prevent
streaking.
PowerDial™ Gun (if equipped)
1. Make connections according to Connect
High-Pressure Hose and Lance in the
owner’s manual.
2. Adjust PowerDial™ according to the task
being performed.
3. Operate according to Spray Gun in the
owner’s manual.
(000100a)
Consult Manual. Read and understand manual
completely before using product. Failure to
completely understand manual and product
could result in death or serious injury.
WARNING
Operation
12 Owner’s Manual for Power Washer
001778
A
B
C
D
E
F
1
234
Features
A Gun Body
B PowerDial™
C Trigger
D Trigger Lock
E Hose Connection
F Lance Connection
Pressure Settings
1 Car
2 Wood Deck
3 Concrete
4 Soap
Maintenance and Troubleshooting
Owner’s Manual for Power Washer 13
Section 4: Maintenance and Troubleshooting
Maintenance
Regular maintenance will improve
performance and extend engine/equipment
life. Generac Power Systems, Inc.
recommends that all maintenance work be
performed by an Independent Authorized
Service Dealer (IASD). Regular maintenance,
replacement, or repair of the emissions control
devices and systems may be performed by
any repair shop or person of the owner’s
choosing. To obtain emissions control
warranty service free of charge, the work must
be performed by an IASD. See the emissions
warranty.
Power washer warranty does not cover items
subjected to operator abuse or negligence. To
receive full warranty value, operator must
maintain power washer as instructed in this
manual, including proper storage as detailed
in Storage.
NOTE: Call 1-888-GENERAC (1-888-436-
3722) with questions about component
replacement.
Maintenance Schedule
Follow maintenance schedule intervals,
whichever occurs first according to use.
NOTE: Adverse conditions will require more
frequent service.
* Clean if clogged. Replace if perforated or torn.
** Service more often under dirty or dusty
conditions.
Pump Oil
DO NOT attempt any oil maintenance on
pump. Pump is lubricated and sealed at
factory. No additional maintenance is required
for life of pump.
Preventive Maintenance
Dirt or debris can cause improper operation
and equipment damage. Clean power washer
daily or before each use. Keep area around
and behind muffler free from combustible
debris. Inspect all cooling air openings on
power washer.
• Use a damp cloth to wipe exterior surfaces
clean.
• DO NOT insert any objects through cooling
air openings.
• Use a soft bristle brush to loosen caked on
dirt, oil, etc.
• Use a vacuum to pick up loose dirt and
debris.
Inspect and Clean Inlet Screen
Inspect inlet screen on pump water inlet.
Clean clogged screen and replace screen if
damaged.
Inspect High-Pressure Hoses
High-pressure hoses can develop leaks from
wear, kinking, or abuse. Inspect hoses before
each use. Inspect for cuts, leaks, abrasions,
bulging, and damage or movement of
couplings. If these conditions exist, replace
hose immediately.
NOTE: DO NOT repair high-pressure hose.
Replace with hose that meets or exceeds
maximum pressure rating of unit.
Inspect Detergent Siphoning Tube
Inspect filter on detergent tube and clean if
clogged. Tube should fit tightly on barbed
fitting. Examine tube for leaks or tears.
Replace filter or tube if either is damaged.
Inspect Spray Gun
NOTE: Replace spray gun immediately if it
fails any test steps.
Figure 4-1. Test Spray Gun (typical)
1. Verify spray gun hose connection is
secure.
2. Squeeze and release trigger.
First 5 Hours
Change engine oil
Every 8 Hours or Daily
Inspect/clean water inlet screen*
Inspect high-pressure hose
Inspect detergent siphoning hose/filter
Inspect spray gun and assembly for leaks
Clean debris
Inspect engine oil level
Every 20 Hours or Every Year
Change engine oil**
Every 50 Hours or Every Year
Inspect/clean air cleaner filter**
Inspect muffler and spark arrestor*
Every 100 Hours or Every Year
Service spark plug
Replace fuel filter
000123
Maintenance and Troubleshooting
14 Owner’s Manual for Power Washer
NOTE: Trigger should spring back into place
and lock when released.
Nozzle Maintenance
A pulsing sensation felt when squeezing spray
gun trigger may be caused by excessive
pump pressure. Typical causes of excessive
pump pressure are nozzle clog or restriction.
Immediately clean nozzle as follows:
1. Turn engine and water supply OFF.
NOTE: Keep high-pressure hose connected
to pump and spray gun while system is
pressurized.
2. Relieve spray gun water pressure.
3. Remove nozzle from lance.
4. See Figure 4-2. Use a paper clip to remove
debris.
Figure 4-2. Remove Debris
5. See Figure 4-3. Remove lance from spray
gun and back flush thoroughly.
Figure 4-3. Back Flush Lance
6. Install nozzle on lance.
7. Install lance on spray gun.
8. Verify hose is connected to pump water
inlet, and high-pressure hose is connected
to spray gun and pump.
9. Turn water ON.
10. Start engine.
11. Test power washer by operating with each
quick connect nozzle.
Engine Maintenance
Engine Oil Recommendations
To maintain the product warranty, the engine
oil should be serviced in accordance with the
recommendations of this manual. For your
convenience, maintenance kits designed and
intended for use on this product are available
from the manufacturer that include engine oil,
oil filter, air filter, spark plug(s), a shop towel
and funnel. These kits can be obtained from
an Independent Authorized Service Dealer
(IASD).
Climate determines proper engine oil
viscosity. See chart to select correct viscosity.
Figure 4-4. Oil Viscosity
* Below 50°F (10°C) use of SAE 30 will result
in hard start.
** Above 80°F (27°C) use of 10W30 may
cause increased oil consumption. Inspect
oil level more frequently.
Inspect Engine Oil Level
Inspect engine oil level prior to each use, or
every 8 hours of operation.
1. Place power washer on a level surface.
2. Clean area around oil fill.
3. See Figure 4-5. Remove oil fill cap/dipstick
and wipe dipstick clean.
Figure 4-5. Engine Oil Fill
4. Thread oil fill cap/dipstick into filler neck.
Oil level is checked with dipstick fully
inserted.
5. See Figure 4-6. Remove oil fill cap/dipstick
and verify oil level is within safe operating
range.
(000106b)
Fluid Injection. This machine produces
high-pressure fluid streams that can pierce
skin. Fluid injection could result in death or
serious injury.
WARNING
000109
000131
000130
SAE 30*
5W-30
10W-30**
000115
Maintenance and Troubleshooting
Owner’s Manual for Power Washer 15
Figure 4-6. Safe Operating Range
6. Add recommended engine oil as
necessary.
7. Install oil fill cap/dipstick and hand-tighten.
NOTE: Some units have more than one oil fill
location. It is only necessary to use one oil fill
point.
Change Engine Oil
When using power washer under extreme,
dirty, dusty conditions, or in extremely hot
weather, change oil more frequently.
NOTE: Don’t pollute. Conserve resources.
Return used oil to collection centers.
Change oil while engine is still warm from
running, as follows:
1. Place power washer on a level surface.
2. Disconnect the spark plug wire from the
spark plug and place the wire where it
cannot contact spark plug.
3. Clean area around oil fill, and oil drain
plug.
4. Remove oil fill cap/dipstick and wipe
dipstick clean.
5. See Figure 4-7. Remove oil drain plug (A)
and drain oil completely into a suitable
container.
Figure 4-7. Oil Drain Plug
6. Install oil drain plug and tighten securely.
7. See Figure 4-6. Add recommended engine
oil. DO NOT overfill. See Engine Oil
Recommendations.
8. See Figure 4-6. Thread dipstick into oil
filler neck. Remove dipstick and verify oil
level is within safe operating range.
9. Install oil fill cap/dipstick, and hand-tighten.
10. Wipe up any spilled oil.
11. Dispose of oil in accordance with all
applicable regulations.
Air Filter
Engine will not run correctly and may be
damaged if run with a dirty air cleaner. Service
air cleaner more frequently in dirty or dusty
conditions.
To service air cleaner:
1. Remove air cleaner cover.
2. Remove filter element(s).
3. Inspect filter element(s) and replace if
damaged. To order replacements, contact
Generac Customer Service at 1-888-
GENERAC (888-436-3722) for the name
of your nearest IASD.
4. Clean foam filter element (if equipped) in
warm soapy water. Rinse, and allow to dry
thoroughly. Dip in clean engine oil and
squeeze out excess oil.
5. Tap paper filter element several times on
hard surface to remove dirt. Compressed
air (not exceeding 30 psi (207 kPa) can
also be used to blow through filter element
from the inside.
6. Use a clean, damp cloth to wipe dirt from
inside air cleaner cover.
7. Put cleaned or new filter element(s) in
place. Verify gasket is in place (if
equipped).
8. Install air cleaner cover. Tighten air
cleaner screws or fasteners securely.
Service Spark Plug
To service spark plug:
1. Clean area around spark plug.
2. Remove and inspect spark plug.
3. See Figure 4-8. Inspect electrode gap with
wire feeler gauge and replace spark plug if
gap (A) is not within specification listed on
Product Specifications Sheet.
Figure 4-8. Spark Plug
NOTE: Replace spark plug if electrodes are
pitted, burned or porcelain is cracked. Use
ONLY recommended replacement plug. See
Product Specifications Sheet.
4. Install spark plug finger tight, and tighten
an additional 3/8 to 1/2 turn using spark
plug wrench.
000116
012437
A
000134a
A
Maintenance and Troubleshooting
16 Owner’s Manual for Power Washer
Inspect Engine Spark
1. Disconnect spark plug wire from spark
plug.
2. Secure spark plug wire where it cannot
contact spark plug.
3. Test spark plug with approved spark plug
tester.
NOTE: DO NOT inspect for spark with spark
plug removed.
Inspect Muffler And Spark Arrestor
NOTE:
It is a violation of California Public
Resource Code, Section 4442, to use or
operate the engine on any forest-covered,
brush-covered, or grass-covered land unless
the exhaust system is equipped with a spark
arrestor, as defined in Section 4442, maintained
in effective working order. Other states or
federal jurisdictions may have similar laws.
NOTE: Call 1-888-GENERAC (1-888-436-
3722) with questions about component
replacement.
NOTE: Use ONLY original equipment
replacement parts.
Inspect muffler for cracks, corrosion, or other
damage. Remove spark arrestor, if equipped,
inspect for damage or carbon blockage. If
replacement parts are required.
Inspect Spark Arrestor Screen
(if equipped)
1. See Figure 4-9 and Figure 4-10. Loosen
fasteners and remove spark muffler cage
(A) and heat shield (B).
2. See Figure 4-11. Loosen fasteners (C) and
remove spark arrestor from muffler.
3. Inspect spark arrestor. Replace if torn,
perforated or otherwise damaged.
4. If screen is not damaged, clean it with a
commercial solvent and replace.
Figure 4-9. Spark Arrestor Fasteners
Figure 4-10. Heat Shield Fasteners
Figure 4-11. Spark Arrestor Fasteners
(000102)
WARNING
Accidental Start-up. Disconnect spark plug wire
when working on unit. Failure to do so could result
in death or serious injury.
(000108)
WARNING
Hot Surfaces. When operating machine, do not
touch hot surfaces. Keep machine away from
combustibles during use. Hot surfaces could
result in severe burns or fire.
012438
A
A
000135
B
B
000136
C
Maintenance and Troubleshooting
Owner’s Manual for Power Washer 17
Maintaining the Battery
See Figure 4-12. Check the charge of the
battery by pressing the Battery Powerbar™
button. A minimum of 2 illuminated LED lights
are required to start the engine.
Figure 4-12. Battery Powerbar™ Button
Charge the Battery
NOTE: The 12V Lithium-ion battery provided
should be used only with the battery charger
supplied with the power washer (P/N:
10000020284).
1. See Figure 4-13. Remove battery from
box.
Figure 4-13. Remove Battery
2. Plug battery charger into a 120V, 60Hz,
AC receptacle only. The green “READY”
LED on the charger will illuminate.
3. Slide battery into charger bay. The red
“CHARGING” LED will illuminate to
indicate charging.
4. When battery is fully charged, the green
“READY” LED will illuminate. Remove
battery from charger.
NOTE: A completely discharged battery will
fully charge in approximately 1.5 hours. The
battery will stay fully charged if left on the
charger with no damage to the battery. The
battery needs to be replaced if the green
“READY” LED does not illuminate after 3
hours of charging. See Replace the Battery.
5. Return battery to box and close the lid for
use.
6. Unplug battery charger from receptacle
when not in use.
Replace the Battery
Contact your nearest Independent Authorized
Service Dealer (IASD), or contact Generac
Customer Service at 1-888-GENERAC (1-
888-436-3722), for battery replacement.
Battery Recycling
NOTE: Dispose of used batteries responsibly,
according to your local hazardous materials
regulations. Never throw away used batteries
in your household garbage.
Always recycle batteries in accordance with
local laws and regulations. Contact your local
solid waste collection site or recycling facility
to obtain information on local recycling
process. Contact your local solid waste
management district or your local waste
handler to locate a collection site nearest you.
To learn more about hazardous waste
recycling, visit the websites for Battery Council
International http://www.batterycouncil.org
and the Environmental Protection Agency
http://www.epa.gov.
Storage
General
• DO NOT place a storage cover on a hot
power washer. Allow unit to cool to room
temperature before storage.
• DO NOT store fuel from one season to
another unless properly treated.
• Replace fuel container if rust is present.
Rust in fuel will cause fuel system
problems.
006467
012430
(000162)
Explosion. Do not dispose of batteries in a fire.
Batteries are explosive. Electrolyte solution can cause
burns and blindness. If electrolyte contacts skin or eyes,
flush with water and seek immediate medical attention.
WARNING
(000163a)
Risk of burn. Do not open or mutilate batteries.
Batteries contain electrolyte solution which can cause
burns and blindness. If electrolyte contacts skin or
eyes, flush with water and seek immediate medical
attention.
WARNING
(000105)
Explosion and Fire. Fuel and vapors are extremely
flammable and explosive. Add fuel in a well
ventilated area. Keep fire and spark away. Failure
to do so will result in death or serious injury.
DANGER
(000109)
WARNING
Risk of Fire. Verify machine has properly
cooled before installing cover and storing
machine. Hot surfaces could result in fire.
Maintenance and Troubleshooting
18 Owner’s Manual for Power Washer
• Cover unit with a suitable protective,
moisture resistant cover.
• Store unit in a clean and dry area.
• Always store power washers and fuel away
from heat and ignition sources.
Prepare Fuel System for Storage
Fuel stored over 30 days can go bad and
damage fuel system components. Keep fuel
fresh, use fuel stabilizer.
If fuel stabilizer is added to fuel system,
prepare and run engine according to Power
Washer Start-Up Run engine for 2 minutes to
circulate stabilizer throughout fuel system.
Adequately prepared fuel can be stored up to
24 months.
NOTE: If fuel has not been treated with fuel
stabilizer, it must be drained into an approved
container. Run engine until it stops from lack
of fuel. Use of fuel stabilizer in fuel storage
container is recommended to keep fuel fresh.
Prepare Engine for Storage
1. Change engine oil.
2. Remove spark plug.
3. Pour a tablespoon (5-10cc) of clean
engine oil or spray a suitable fogging
agent into cylinder.
4. Pull starter recoil several times to
distribute oil in cylinder.
5. Install spark plug.
6. Pull recoil slowly until resistance is felt.
This will close valves so moisture cannot
enter engine cylinder. Gently release
recoil.
Change Oil
Change engine oil before storage. See
Change Engine Oil.
Prepare Pump for Storage
NOTE: If not using power washer for more
than 30 days, prepare engine and pump for
storage.
Protect unit from freezing temperatures.
Failure to do so will permanently damage
pump and render unit inoperable. Freeze
damage is not covered under warranty.
Protect unit from freezing temperatures as
follows:
1. Turn engine OFF.
2. Turn fuel valve to OFF.
3. Turn water supply OFF.
4. Point spray gun in a safe direction, and
squeeze trigger to relieve trapped
pressure.
5. Let engine cool.
6. Disconnect hoses from spray gun and
high-pressure outlet on pump. Drain water
from hoses, spray gun, and lance. Use a
rag to wipe off components.
7. Empty pump of all remaining liquids.
8. Pull recoil handle approximately six times
to remove remaining liquid from pump.
9. Winterize pump with Generac Pump
Shield™ (P/N 0L2414). This minimizes
freeze damage and lubricates pistons and
seals.
NOTE: If Generac Pump Shield™ is not
available, connect a 3 ft (1 m) section of
garden hose to water inlet adapter. Pour RV-
antifreeze (alcohol free antifreeze) into hose.
Pull recoil handle twice. Disconnect hose.
Store unit in a clean and dry area.
Prepare Battery and Charger for
Storage
When not in use, disconnect battery charger
and store in a cool, dry area. Wet, damp areas
cause corrosion of terminals and electrical
contacts. If stored for long periods in high
temperatures (110°F), permanent damage to
the battery can result. Check electrical
terminals and contacts on the battery and
charger. Wipe with clean, dry cloth or blow
clean with compressed air.
After storage, check the charge of the battery
by pressing the Battery Powerbar™ button. A
minimum of 2 illuminated LED lights are
required to start the engine. See Maintaining
the Battery.
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