Generac Pressure Washer 6565 User Manual

Operator's Manual  
Power Washer  
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Frequently Asked Questions  
This list of Frequently Asked Questions (FAQs) are the frequently  
asked questions that pertain to ALL Power Washer models.  
Q: Are the chemicals added upstream or downstream?  
A: The siphon hose connects directly to the pump with the  
appropriate sized nozzle. The pump pressure provides the  
necessary suction to incorporate the detergent into the high  
pressure water stream.  
Some questions may not be applicable to the model(s) covered in  
this publication.  
Please review the Safety Section of your product’s Owners or  
Installation Manual before operating your power washer.  
Q: Do the onboard detergent tanks need to be used or can you  
feed detergent through the hose?  
A: The onboard detergent tanks do not need to be utilized. You  
will want to ensure that the detergent siphon hose is properly  
submerged in the detergent container being used.  
Q: What do the different nozzles do?  
A: The recommended nozzle tip for each job will depend on the  
PSI of the power washer.  
• BLACK – detergent/ soap nozzle  
• WHITE – delicate rinse (lower pressure and higher flow)  
• GREEN – general purpose cleaning  
• YELLOW – general rinsing  
Q: Can I use a garden hose shorter than 10 feet or longer than  
50 feet?  
A: When utilizing a power washer, we require a minimum of 10  
feet and maximum of 50 feet of unrestricted garden hose for  
proper water supply.  
• RED – maximum blasting  
Q: What kind of hose connections are on the unit?  
A: The consumer series utilize a M22 threaded connection.  
Q: What kind of soap can be used?  
Professional models utilize a quick- change hose connections.  
A: You should use a soap made for pressure washers with  
dilution rate recommended on the detergent bottle. Liquid soap  
is fine – just make sure the soap is not acid based, as it could  
damage the pump. Always remember to put the pickup tube  
in clean water and flush the system after each use.  
Q: Is the pressure adjustable?  
A: Many, but not all, of our residential/commercial power  
washers have manual throttle control, which changes the  
water pressure from the nozzle. Use of the proper nozzle for  
the job will also provide a different pressure stream. This will  
reduce the psi output, though the flow will remain the same.  
Q: How do I stop using soap or switch back to regular water to  
A: When detergent is no longer needed, we recommend ensuring  
that the siphon hose and pump are properly flushed according  
to the directions in your owner’s manual to prevent damage to  
the other nozzles. Once the system has been properly flushed,  
the detergent hose can be removed from the connection point  
of the pump and the desired pressure nozzle can be utilized.  
We recommend following these steps, as they are the safest  
to ensure there is no damage to the power washer or to the  
desired pressure nozzle.  
Q: What is the PSI range over which the unit can be adjusted?  
A: The units have a factory-set PSI output (the rating is on the  
unit: 2700, 2800, 3000, 4200 PSI, etc.). However, through  
nozzle changes or with throttle control, the PSI can be altered.  
Due to variation in engine speed, which is customer controlled  
with the throttle control, on some units, the PSI can vary. The  
OneWASH™ PSI range is adjustable from 2000 – 3000 PSI by  
utilizing the PowerDial™ to customize PSI for every job.  
Q: Can I add a detergent tank?  
A: We do not recommend any modifications to the unit. If  
additional detergent is needed, the siphon hose can be  
submerged into an external container.  
Q: What is the engine rated in operational hours?  
A. With proper maintenance, you can expect years of reliable  
service. Based on the many environmental and operational  
factors involved, we are unable to give an exact life expectancy  
for the engine.  
Q: Does the siphon tube need to be connected if you are not  
using detergent?  
A: If detergent is not necessary for the job being performed,  
the detergent siphon hose does not need to be attached. You  
will want to ensure that the water supply hose and the high  
pressure hose are correctly attached before each use.  
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Fequently Asked Questions  
Q: What is the horsepower for the engine?  
A: Engine horsepower can vary based on the unit and application.  
They feature a Generac OHV engine. When selecting a power  
washer, the most important thing to consider is cleaning  
power. Cleaning Power is the Output Pressure PSI multiplied  
by the Water Flow Rate (GPM). The higher the cleaning power,  
the more effectively it will clean.  
Q: Is the pump servicable?  
A: Consumer units and the One WASH power washer feature  
an axial pump that is not serviceable. The pump has been  
pre-lubricated and sealed from the factory. It will require no  
additional maintenance for the life of the pump. Commercial  
and Industrial units feature a serviceable Triplex pump. Triplex  
units can be serviced with oil changes and replacement of  
check valves and seals. Disassembly for cleaning is not  
recommended. Consult your owner’s manual for more details.  
Q: Why is the GPM rating on the pump different from the GPM  
rating of the data plate?  
A: Both ratings are correct. Pump ratings of PSI and GPM, on the  
pump, are rated on test parameters and lab conditions. The  
GPM specifications, on the data plate, are based on the Power  
Washer Manufacturers Association (PWMA) performance  
Q: Can I pump hot water through this unit?  
A: Only cold water (less than 100º F) should be utilized for  
Generac power washers.  
Q: Will this power washer work with a gravity feed water tank?  
A: The water supply must be adequate to handle more than 3.5  
gallons per minute and no less than 30 PSI. Do not siphon  
standing water for the water supply. Ensure that you use only  
cold water (less than100º F).  
Q: How will hard water affect the power washer and what can  
I do to prevent or fix any issues?  
A: Hard water deposits, like calcium or lime scale, could  
potentially damage the pump. To prevent damage to the pump  
due to hard water, we recommend following the instructions in  
your owner’s manual for long-term storage pump protection,  
with regard to using pump saver or RV anti-freeze after each  
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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 4000 psi depending on which model you purchased.  
These units feature powerful Generac engines, a triplex pump with  
ceramic coated pistons, a pressure control valve, an automatic  
thermal relief system, a professional grade spray gun with  
vibration isolation for reduced fatigue, a stainless steel lance, quick  
connect nozzles, steel reinforced high pressure rubber hose for  
long life and maximum flexibility and a detergent siphoning hose.  
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:  
Indicates a hazardous situation or action which, if not avoided,  
will result in death or serious injury.  
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,  
could result in death or serious injury.  
Indicates a hazardous situation or action which, if not avoided,  
could result in minor or moderate injury.  
The power washer can operate safely, efficiently and reliably only  
if it is properly located, operated and maintained. Before operating,  
servicing or storing:  
Notes contain additional information important to a procedure  
and will be found within the regular text body of this manual.  
• 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.  
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  
Hearing Protection  
Save these instructions for future reference. If you loan this  
device to someone, ALWAYS loan ALL instructional materials to  
the individual as well.  
Toxic Fumes  
Electrical Shock  
Fluid Injection  
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.  
Slippery Surface  
Model Number  
Serial Number  
Date Purchased  
Operator’s Manual  
Hot Surface  
Moving Parts  
Flying Objects  
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Safety Rules  
WARNING: Hearing Protection Recommended.  
WARNING: Contact with muffler area can result in serious  
burns. Exhaust heat/gases can ignite combustibles,  
structures or damage fuel tank causing a fire.  
• 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.  
DANGER: NEVER aim spray gun at people, animals, or  
electrical devices. Serious injury or death will result.  
• 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.  
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.  
• 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  
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.  
• 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.  
WARNING: Fuel and its vapors are extremely flammable and  
explosive. Fire or explosion can cause severe burns or death.  
• 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.  
• Fill or drain fuel tank outdoors.  
• DO NOT overfill tank. Allow space for fuel expansion.  
• If fuel spills, wait until it evaporates before starting  
• Keep fuel away from sparks, open flames, pilot lights, heat, and  
other ignition sources.  
• DO NOT light a cigarette or smoke.  
• ALWAYS be certain spray gun, nozzles and accessories are  
correctly attached.  
WARNING: Risk of electrocution.  
• Ensure spark plug, muffler, fuel cap, and air cleaner are in place.  
• DO NOT crank engine with spark plug removed.  
Contact with power source can cause electric shock or  
• DO NOT tip engine or equipment at angle which causes fuel to  
• NEVER spray near power source.  
• DO NOT spray flammable liquids.  
• Transport/repair with fuel tank EMPTY or with fuel shutoff valve  
• Disconnect spark plug wire.  
• 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.  
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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  
High pressure spray may damage fragile items including  
• DO NOT point spray gun at glass when using red (0°) MAX  
• 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  
• Do not use on elevated surfaces where chance of kickback  
could result in a serious fall.  
• NEVER aim spray gun at people, animals, electrical devices or  
Improper treatment of power washer can damage it and  
shorten its life.  
• Firmly grasp spray gun with both hands when using high  
pressure spray to avoid injury when spray gun kicks back.  
• 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.  
• 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.  
WARNING: Starter and other rotating parts can  
ntangle hands, hair, clothing, or accessories.  
• NEVER operate power washer without protective housing  
or covers.  
• 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.  
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.  
• NEVER pull starter cord without first relieving spray gun  
• 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  
• Disconnect the spark plug wire from the spark plug and  
place the wire where it cannot contact spark plug.  
• 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.  
• 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.  
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General Information  
K - High Pressure Outlet – Connection for high pressure hose.  
L - Water Inlet – Connection for Garden Hose.  
M - Fuel Tank – Fill tank with regular unleaded fuel. Always leave  
room for fuel expansion.  
N - Fuel On/Off Switch – Turns fuel supply to the engine on and  
O - Choke – Prepares a cold engine for starting.  
P - Throttle Lever – Increases or decreases engine speed. Throttle  
should be at maximum travel when the pressure washer is in  
Q - Nozzles – Chemical injection, 0°, 15°, 25°, 40° (white, yellow,  
red and black) for various high pressure cleaning applications.  
R - Pull Pin – Pull the ring to unlock the handle. This allows the  
handle to be collapsed for storage.  
S - Adjustable Side Handle – Adjustable by turning counter clock-  
wise to loosen, adjust to comfortable position and tighten  
clock-wise. This allows for a firm operating grip of the spray  
T - Oil Drain – Drain engine oil here.  
U - Serial Number Location  
Read this owner’s manual and safety rules before operating your  
power washer.  
If you loan this device to someone, ALWAYS loan ALL instructional  
documentation 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.  
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  
four different nozzles.  
C - High Pressure Hose – Connect one end to water pump and  
the other to the spray gun.  
D - Recoil Starter – Use for starting the engine.  
E - Oil Fill – Check and add engine oil here.  
F - Air Filter – Protects engine by filtering dust, and debris out of  
the intake air.  
G - Pump – Develops high pressure.  
H - Thermal Relief Valve – Cycle’s water through the pump when  
water reaches 125°F. Warm water will discharge from pump  
onto ground. This prevents internal pump damage.  
I - Engine On/Off Switch – Run this switch to “ON” before using  
the recoil starter. Turn the switch to “OFF” to stop the engine.  
J - Pressure Control/Unloader Valve – Controls the high pressure  
Identification Label (near rear of base plate) – Provides model  
and serial number of pressure washer. Please have these readily  
available if calling for assistance.  
Detergent Siphoning Tube/Filter – Use to siphon pressure washer  
safe detergents into the low pressure stream.  
Figure 1 – Features & Controls  
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General Information  
Pressure - (PSI / BAR)  
3100 / 213  
2.8 / 10.6  
3800 / 262  
3.6 / 13.6  
4200 / 290  
4.0 / 15.1  
Flow Rate - (GPM / LPM)  
Water Supply Temperature - (°F / C°)  
Hose Length - (Feet / Meters)  
Nozzles - Number per Unit  
Lance Length (Inches / cm)  
100 / 38 Max  
35 / 10.7  
50 / 15.2  
33 / 84  
20 / 51  
33 / 84  
18.4 / 302  
Engine Displacement - (Cubic Inch / cc)  
Spark Plug Type  
12.9 / 212  
25.6 / 420  
F7TC or equivalent  
Spark Plug Gap - (Inches / mm)  
Fuel Capacity - (Quarts / Liters)  
Engine Oil Capacity - (Oz / Liters)  
Low Oil Shut Down System  
On / Off Switch  
0.028-0.031 / 0.70-0.80  
3.7 / 3.5  
20 / 0.6  
6.9 / 6.5  
37 / 1.1  
6.9 / 6.5  
37 / 1.1  
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:  
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 Range*  
0 - 5000 Feet  
Kit Number  
Not Required  
5000 - 7000 Feet  
5000 - 7000 Feet  
5000 - 7000 Feet  
• Removal or alteration of any part of the intake, fuel, or exhaust  
• Altering or defeating the governor linkage or speed-adjusting  
mechanism to cause the engine to operate outside its design  
*Elevation above sea level.  
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.  
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)  
• Black exhaust smoke or high fuel consumption  
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