Generac Power Systems 4240 PRO GAS PW 49ST EPA III User manual

SAVE THIS MANUAL FOR FUTURE REFERENCE
Power Washer
Owner’s Manual
009045
009073
MODEL:________________________
SERIAL:________________________
DATE PURCHASED:______________
Register your Generac product at:
register.generac.com
1-888-922-8482

Table of Contents
Section 1 Introduction and Safety 1
Safety Rules .................................... 1
Safety Symbols and Meanings ........ 2
Section 2 General Information and
Setup .............................................. 3
Know Your Power Washer .............. 3
Emissions ........................................ 3
Remove Contents from Carton ....... 3
Assembly ......................................... 3
Check Pump Oil .............................. 4
Add Engine Oil ................................ 4
Fuel ................................................. 5
Water Supply ................................... 5
Connect Water Supply .................... 5
Connect High-Pressure Hose and
Lance .............................................. 5
Spray Gun ....................................... 6
Nozzles ........................................... 6
Section 3 Operation ...................... 7
Operation and Use Questions ......... 7
Before Starting Engine .................... 7
Prepare Power Washer for Use ...... 7
Power Washer Start-Up .................. 7
Apply Detergent .............................. 8
Rinsing ............................................ 9
Clean Detergent Siphoning Tube .... 9
Automatic Cool Down System
(Thermal Relief) .............................. 9
Adjustable Pressure Setting ............ 9
Section 4 Maintenance and
Troubleshooting ..........................10
Maintenance ..................................10
Maintenance Schedule ..................10
Preventive Maintenance ................10
Engine Maintenance ......................11
Service Spark Plug ........................13
Storage ..........................................14
Troubleshooting ............................15
Notes .............................................16
(000393a)
WARNING
CANCER AND REPRODUCTIVE HARM
www.P65Warnings.ca.gov.

Introduction and Safety
Owner’s Manual for Power Washer 1
Section 1 Introduction and Safety
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.
WARNING
(000228)
Environmental Hazard. Always recycle batteries at an
official recycling center in accordance with all local
laws and regulations. Failure to do so could result in
environmental damage, death, or serious injury.
(000244)
Personal Injury / Equipment Damage. Place wand 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

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
assembling and operating this unit. Save this
manual for future and immediate reference.
Replacement 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
• High-pressure Hose
• Siphon Hose and Filter
• Spray Gun
• Lance
• Oil
• Parts Bag (includes):
– Owner’s Manual
– Warranty
– Hose Hook Wireform
– Bag of Colored Nozzles
– 4mm Allen Wrench
– Screws
– Filter Screen
– Register your product at https://reg-
ister.generac.com/
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. Pull out pull pin to raise
handle and lock into place (A).
Figure 2-1. Attach Handle
2. See Figure 2-2. Install hose hook using
screws and Allen wrench.
3. Coil hose and hang on hook.
Figure 2-2. Install Hose Hook
4. See Figure 2-3. Insert and snap nozzles
into spaces provided in panel.
(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
A
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