Generac Pressure Washer 6412 User Manual

Operator's Manual  
OneWASH™ Power Washer  
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Introduction  
INTRODUCTION  
SAFETY RULES  
Thank you for purchasing this power washer manufactured by  
Generac Power Systems, Inc. This model is a high performance,  
air-cooled, engine-driven power washer that operates between  
3000 and 3100 psi depending on which model you purchased.  
The units feature custom designed wheels, axial cam pump  
with stainless steel pistons, automatic cool down system, quick  
connect nozzles, high pressure hose, detergent siphoning hose  
and chemical tank.  
Throughout this publication, and on tags and decals affixed to  
the power washer, 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. Their definitions  
are as follows:  
Commonsenseandstrictcompliancewiththespecialinstructions  
are essential to preventing accidents. The operator must read  
this manual and thoroughly understand all of the instructions  
and warnings before using the equipment. If any portion of the  
manual is not understood, contact the nearest Authorized Dealer  
for starting, operating and servicing procedures. The owner is  
responsible for proper and safe use of the equipment.  
Indicates a hazardous situation or action which, if not avoided,  
will result in death or serious injury.  
Indicates a hazardous situation or action which, if not avoided,  
could result in death or serious injury.  
The power washer can operate safely, efficiently and reliably only if  
it is properly located, operated and maintained. Before operating,  
servicing or storing:  
Indicates a hazardous situation or action which, if not avoided,  
could result in minor or moderate injury.  
NOTE:  
• Study all warnings in this manual and on the product carefully.  
• Become familiar with this manual and the unit before use.  
• Refer to the Assembly section of the manual for instructions on  
final assembly procedures. Follow the instructions completely.  
Notes contain additional information important to a procedure  
and will be found within the regular text body of this manual.  
These safety warnings 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.  
The manufacturer cannot anticipate every possible circumstance  
that might involve a hazard. The warnings in this manual, and on  
tags and decals affixed to the unit are, therefore, not all inclusive.  
If using a procedure, work method or operating technique that the  
manufacturer does not specifically recommend, ensure that it is  
safe for others. Also make sure the procedure, work method or  
operating technique utilized does not render the power washer  
unsafe.  
SAFETY SYMBOLS AND MEANINGS  
THE INFORMATION CONTAINED HEREIN WAS BASED ON  
MACHINES IN PRODUCTION AT THE TIME OF PUBLICATION.  
GENERAC RESERVES THE RIGHT TO MODIFY THIS MANUAL AT  
ANY TIME.  
Toxic Fumes  
Kickback  
Electrical Shock  
Fluid Injection  
Save these instructions for future reference. If you loan this  
device to someone, ALWAYS loan these instructions AND the  
Owner's Manual to the individual as well.  
Fall  
Slippery Surface  
WHERE TO FIND US  
You can contact Generac Customer Service by phone at 1-888-  
important information of the unit in the following chart for future  
reference and/or service inquiries.  
Fire  
Explosion  
Operator’s Manual  
Hot Surface  
Model Number  
Serial Number  
Date Purchased  
Moving Parts  
Flying Objects  
1
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Safety Rules  
DANGER: Carbon monoxide produced during use CAN KILL  
sheltered areas, EVEN IF doors and windows are open. Only  
use OUTSIDE and far away from windows, doors and vents.  
in minutes. NEVER use indoors, in a vehicle, or in other  
WARNING: Risk of electrocution.  
Contact with power source can cause electric shock or  
burn.  
Some chemicals or detergents may be harmful if inhaled  
or ingested, causing severe nausea, fainting, or poisoning.  
• NEVER spray near power source.  
• Operate power washer ONLY outdoors.  
• A running engine gives off carbon monoxide.  
WARNING: Contact with muffler area can result in serious  
burns. Exhaust heat/gases can ignite combustibles,  
structures or damage fuel tank causing a fire.  
• Carbon monoxide is an odorless, colorless, poisonous gas.  
Breathing carbon monoxide can cause headache, fatigue,  
dizziness, vomiting, confusion, seizures, nausea, fainting  
or death. If you start experiencing any of these symptoms,  
IMMEDIATELY move to fresh air. Seek medical attention.  
• Keep exhaust gas from entering a confined area through  
windows, doors, ventilation intakes, or other openings. Warn any  
occupants inside about the symptoms of carbon monoxide so  
they know to move to fresh air if they begin to feel ill.  
• The use of a carbon monoxide detector inside any occupied  
premises between the power washer and the occupant is  
recommended.  
• NEVER start or run engine indoors, in a vehicle, or in an  
enclosed area, EVEN IF windows and doors are open.  
• Use a respirator or mask whenever there is a chance that  
harmful gas or vapors may be inhaled.  
• Read all instructions with respirator or mask so you are certain  
the respirator or mask will provide the necessary protection  
against inhaling harmful gas or vapors. If you begin to  
experience any of the CO symptoms listed above, IMMEDIATELY  
move to fresh air.  
• DO NOT touch hot parts and AVOID hot exhaust gases.  
• Allow equipment to cool before touching.  
• Keep at least five (5) feet (152 cm) of clearance on all  
sides of power washer including overhead.  
• 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 arrester, as defined in  
Section 4442, maintained in effective working order. Other  
states or federal jurisdictions may have similar laws.  
Contact the original equipment manufacturer, retailer, or dealer to  
obtain a spark arrester designed for the exhaust system installed  
on this engine.  
• Replacement parts must be the same and installed in the same  
position as the original parts.  
WARNING: Fuel and its vapors are extremely flammable and  
explosive. Fire or explosion can cause severe burns or death.  
  
WHEN ADDING OR DRAINING FUEL  
DANGER: NEVER aim spray gun at people, animals, or  
electrical devices. Serious injury or death will result.  
• Turn power washer OFF and let it cool at least two (2)  
minutes before removing fuel cap. Loosen cap slowly to  
relieve pressure in tank.  
ALWAYS point spray gun in safe direction, squeeze spray gun  
trigger to release high pressure, every time you stop engine.  
Engage trigger lock when not in use.  
• Fill or drain fuel tank outdoors.  
• DO NOT overfill tank. Allow space for fuel expansion.  
• If fuel spills, wait until it evaporates before starting  
engine.  
• The high pressure stream of water that this equipment  
produces can cut through skin and its underlying tissues,  
leading to serious injury, possible amputation or death.  
Spray gun traps high water pressure, EVEN WHEN engine  
is stopped and water is disconnected, which can cause  
injury.  
• Keep fuel away from sparks, open flames, pilot lights, heat, and  
other ignition sources.  
• DO NOT light a cigarette or smoke.  
WHEN STARTING EQUIPMENT  
• Ensure spark plug, muffler, fuel cap, and air cleaner are in place.  
• DO NOT crank engine with spark plug removed.  
• NEVER allow CHILDREN to operate power washer or play nearby.  
This is NOT a toy.  
• NEVER repair high pressure hose. Replace it.  
• NEVER repair leaking connections with sealant of any kind.  
Replace o-ring or seal.  
• NEVER connect high pressure hose to nozzle extension.  
• Keep high pressure hose connected to pump and spray gun  
while system is pressurized.  
• NEVER secure spray gun in open position.  
• NEVER 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.  
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.  
• Disconnect spark plug wire.  
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.  
• ALWAYS be certain spray gun, nozzles and accessories are  
correctly attached.  
2
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Safety Rules  
WARNING: Use of power washer can create puddles and  
slippery surfaces. Kickback from spray gun can cause you to  
fall.  
WARNING: The engine exhaust from this product contains  
chemicals known to the State of California to cause cancer,  
birth defects, or other reproductive harm.  
• Use only on a level surface.  
• The cleaning area should have adequate slopes and  
drainage to reduce the possibility of a fall due to slippery  
surfaces.  
• Do not use on elevated surfaces where chance of kickback  
could result in a serious fall.  
WARNING: This product contains lead and lead compounds,  
known to the State of California to cause birth defects or  
other reproductive harm. Wash your hands after handling this  
product.  
NOTE:  
• Firmly grasp spray gun with both hands when using high  
pressure spray to avoid injury when spray gun kicks  
back.  
High pressure spray may damage fragile items including  
glass.  
• DO NOT point spray gun at glass when using red (0°) MAX  
WARNING: Starter and other rotating parts can  
e
ntangle hands, hair, clothing, or accessories.  
nozzle.  
• NEVER aim spray gun at people, animals, electrical devices or  
• NEVER operate power washer without protective housing  
or covers.  
plants.  
NOTE:  
• 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.  
Improper treatment of power washer can damage it and  
shorten its life.  
• If you have questions about intended use, ask dealer or contact  
qualified service center.  
• NEVER operate units with broken or missing parts, or without  
protective housing or covers.  
WARNING: Starter cord kickback (rapid retraction) can result  
in bodily injury. Kickback will pull hand and arm toward  
engine faster than you can let go. Broken bones, fractures,  
bruises, or sprains could result.  
• DO NOT by-pass any safety device on this machine.  
• DO NOT operate power washer above rated pressure.  
• DO NOT modify power washer in any way.  
• Before starting power washer in cold weather, check all parts of  
the equipment to be sure ice has not formed there.  
• NEVER move machine by pulling on hoses. 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 power washer.  
• This equipment is designed to be used with Generac authorized  
parts ONLY. If equipment is used with parts that DO NOT  
comply with minimum specifications, user assumes all risks  
and liabilities.  
• NEVER pull starter cord without first relieving spray gun  
pressure.  
• To relieve trapped pressure, point gun in safe direction and  
release pressure by pulling/actuating trigger on spray gun.  
• When starting engine, pull cord slowly until resistance is felt and  
then pull rapidly to avoid kickback.  
• After each starting attempt, where engine fails to run, always  
point spray gun in safe direction, and squeeze spray gun trigger  
to release high pressure.  
• Firmly grasp spray gun with both hands when using high  
pressure spray to avoid injury when spray gun kicks back.  
WARNING: Unintentional sparking can result in fire or electric  
shock.  
WHEN ADJUSTING OR MAKING REPAIRS TO YOUR POWER  
WASHER.  
• Disconnect the spark plug wire from the spark plug and  
place the wire where it cannot contact spark plug.  
CALIFORNIA PROPOSITION 65 WARNING  
Engine exhaust and some of its constituents are known  
to the State of California to cause cancer, birth defects  
and other reproductive harm.  
WHEN TESTING FOR ENGINE SPARK  
• Use approved spark plug tester.  
• DO NOT check for spark with spark plug removed.  
WARNING: Risk of eye injury. Spray can splash back or  
propel objects.  
  
CALIFORNIA PROPOSITION 65 WARNING  
This product contains or emits chemicals known to the  
State of California to cause cancer, birth defects and  
other reproductive harm.  
• Always wear safety goggles when using this equipment or  
in vicinity of where equipment is in use.  
• Before starting the power washer, be sure you are  
wearing adequate safety goggles.  
• NEVER substitute safety glasses for safety goggles.  
3
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General Information  
L - Water Inlet – Connection for Garden Hose.  
M - Fuel Tank – Fill tank with regular unleaded fuel. Always leave room  
for fuel expansion.  
O - Choke Prepares a cold engine for starting.  
KNOW YOUR POWER WASHER  
Read this owner’s manual and safety rules before operating your  
high power washer. If you loan this device to someone, ALWAYS  
loan these instructions AND the owner’s manual to the individual  
as well. Compare the illustrations with your high power washer to  
familiarize yourself with the locations of various controls (Figure  
1). Save this manual for future reference. Replacement owner’s  
manuals can be printed from the Generac Web site.  
P - Power Dial – Provides optimal cleaning power for each desired  
application.  
Q - Nozzles Chemical injection, Blast (0°), Wash (25°), Detergent for  
various high pressure cleaning applications.  
R - Chemical Tank – A drain-able tank used to hold power washer safe  
detergents to be siphoned into the low pressure stream.  
S - Prepare/Start Instruction – Identifies proper procedure to set up  
and start/stop power washer.  
T - Drain Plug – Used to drain engine oil.  
A - Spray Gun – Controls the application of water onto the cleaning  
surface with trigger device. Includes a trigger lock.  
B - Lance with Quick Connect – Allows you to switch between different  
nozzles.  
C - High Pressure Hose – Connect one end to water pump and the other  
U - Serial Number Location  
to the spray gun.  
D - Recoil Starter – Use for starting the engine.  
E - Oil Fill – Check and add engine oil.  
V - System Alert LED – The system will monitor the engine oil level and  
the water supply pressure. The engine will shut down and a fault  
indicator light will display on the control panel.  
W - Chemical Tank Fill Cap  
X - Chemical Tank Drain Cap  
F - Air Filter – Protects engine by filtering dust and debris out of the  
intake air.  
G - Pump Develops high pressure.  
H - Thermal Relief Valve – Cycles water through the pump when water  
reaches 125°F warm water will discharge from pump onto ground.  
This prevents internal pump damage.  
ITEMS NOT SHOWN  
• Identification Label (on engine blower housing) – Provides model  
and serial number of power washer. Please have these readily available  
if calling for assistance.  
I
- Engine On/Off Switch – Turn this switch to “ON” before using the  
recoil starter. Turn the switch to “OFF” to stop the engine.  
J - Unloader Valve – Controls the high pressure output.  
K - High Pressure Outlet – Connection for high pressure hose.  
• Detergent Siphoning Tube/Filter – Use to siphon power washer safe  
detergents into the low pressure stream.  
Figure 1 – Features & Controls  
A
V
P
I
Q
O
M
S
C
J
H
F
D
E
K
T
R
L
B
H
G
U
S
W
X
4
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General Information  
PRODUCT SPECIFICATIONS  
HIGH ALTITUDE OPERATION  
Pressure - (PSI / BAR).....................3000/207 & 3100/213 Max  
Flow Rate - (GPM / LPM).......................................2.8/10.6 Max  
Water supply temperature - (°F / C°) ........................100/38 Max  
Hose length - (Feet / Meters) ...........................................30/9.1  
Chemical Tank(s) - Number per unit......................................... 1  
Chemical Tank - Capacity (Gal) N/A .................................... 0.75  
Nozzles - Number per unit........................................................ 3  
Lance Length (Inches / cm)..............................................20/51  
Gun ..............................................................................Standard  
Engine Displacement - (Cubic Inch / cc) ......................12.9/212  
Spark Plug Type.............................................F7TC or equivalent  
Spark Plug Gap - (Inches / mm) ............ 0.028-0.031/0.70-0.80  
Fuel Capacity - (Quarts / Liters)......................................3.7/3.5  
Oil Capacity - (Oz / Liters)................................................20/0.6  
Low Oil Shut Down System ..................................................Yes  
Low Water Sensor Shut Down System..................................Yes  
On/Off Switch .......................................................................Yes  
The fuel system on this engine may be influenced by operation at  
higher altitudes. Proper operation can be ensured by installing an  
altitude kit when required. See the table below to determine when  
an altitude kit is required. Operating this engine without the proper  
altitude kit installed may increase the engine’s emissions and  
decrease fuel economy and performance. Kits may be obtained  
from any Dealer and should be installed by a qualified individual.  
Altitude*  
Kit Number  
Not Required  
PSI  
0 - 5000 Feet  
5000 - 7000 Feet  
3000/3100  
3000/3100  
0K2016  
*Elevation above sea level.  
NOTE:  
If the altitude kit has been installed and the engine will be  
operated at an altitude where the kit is not required, the  
engine should be returned to the original factory configuration.  
Operating the engine at lower altitudes with the kit installed  
may cause the engine to overheat and result in serious engine  
damage, and may result in decreased performance and  
increased emissions.  
EMISSIONS INFORMATION  
The U.S. Environmental Protection Agency (and California Air  
Resource Board for equipment certified to CA standards) requires  
that this engine comply with exhaust and evaporative emission  
standards. Locate the emissions compliance decal on the engine  
to determine what standards the engine meets, and to determine  
which emissions warranty applies. The engine is certified to meet  
the applicable emission standards on gasoline. It is important to  
follow the maintenance specifications in the Maintenance section  
to ensure that the engine complies with the applicable emission  
standards for the duration of the product’s life. This engine utilizes  
lean carburetion settings and other systems to reduce emissions.  
Tampering with or altering the emission control system may  
increase emissions and may be a violation of Federal or California  
Law. Acts that constitute tampering include but are not limited to:  
UNPACKING  
1. Remove the parts bag, accessories, and inserts included with  
power washer.  
2. Open carton completely by cutting each corner from top to  
bottom.  
3. Ensure you have all included items prior to assembly.  
• Main Unit  
• Handle Assembly  
• High Pressure Hose  
• Siphon Hose & Filter  
• Spray Gun  
• Lance with Quick Connect Fitting  
• Oil Bottle  
• Removal or alteration of any part of the intake, fuel, or exhaust  
systems  
• Hose Hook Wire form  
• Parts Bag (which includes the following):  
– Operator’s Manual  
– Warranty Statement  
– Emission Warranty Statement  
– CARB Emission Warranty Statement  
– Owner’s Registration Card  
– Bag containing Color-coded Nozzles  
– 4mm Allen wrench  
• Altering or defeating the governor linkage or speed-adjusting  
mechanism to cause the engine to operate outside its design  
parameters  
If you are aware of any of the following symptoms, have your  
engine inspected and repaired by your servicing dealer:  
• Hard starting or stalling after starting  
• Rough idle  
• Misfiring or backfiring under load  
• Afterburning (backfiring)  
– Screw (Qty 4)  
– Tree clips (Qty 4)  
– Plastic Gun Holder  
– Plastic Lance Holder  
• Black exhaust smoke or high fuel consumption  
4. If you are missing any items from your carton, please call  
Generac Customer Service at 1-888-436-3722. When calling  
for assistance, please have the model and serial number from  
the data tag available.  
5. Fill out and send in registration card. Write Model number,  
Serial number & date of purchase in the table located in the  
"Where to Find Us" section.  
5
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