Generac Power Systems Pro 6712 Operator's Manual

Power Washer

Operator’s Manual

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MODEL:________________________ SERIAL:________________________ DATE PURCHASED:______________

1-888-922-8482

Operator’s Manual for Power Washer i

SAVE THIS MANUAL FOR FUTURE REFERENCE

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WARNING

CANCER AND REPRODUCTIVE HARM

www.P65Warnings.ca.gov.

Section 1 Introduction and Safety 1

Introduction .....................................1

Safety Rules .................................... 1

Safety Symbols and Meanings ........ 2

Section 2 General Information and

Setup ..............................................3

Know Your Power Washer .............. 3

Emissions Information ..................... 3

Remove Contents from Carton .......4

Assembly ......................................... 4

Add Engine Oil ................................ 4

Check Pump Oil .............................. 5

Fuel .................................................5

Water Supply ................................... 5

Connect Water Supply .................... 6

Connect Lance and High-Pressure

Hose to Spray Gun ..........................6

Spray Gun ....................................... 6

How to Use Nozzles ........................ 6

Section 3 Operation .......................8

Operation and Use Questions .........8

Before Starting Engine ....................8

Prepare Power Washer for Use .......8

Apply Detergent .............................10

Rinsing ...........................................10

Clean Detergent Siphoning Tube ..10 Automatic Cool Down System

(Thermal Relief) .............................11

Section 4 Maintenance and

Troubleshooting ..........................12

Maintenance ..................................12

Maintenance Schedule ..................12

Preventive Maintenance ................12

Engine Maintenance ......................14

Service Spark Plug ........................15

Storage ..........................................16

Troubleshooting .............................18

Notes .............................................19

Section 1 Introduction and Safety

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WARNING

Consult Manual. Read and understand manual completely before using product. Failure to completely understand manual and product could result in death or serious injury.

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DANGER

Indicates a hazardous situation which, if not avoided, will result in death or serious injury.

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WARNING

Indicates a hazardous situation which, if not avoided, could result in death or serious injury.

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CAUTION

Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.

Introduction and Safety

Introduction

Thank you for purchasing a Generac Power Systems Inc. product. This unit has been designed to provide high performance, efficient operation, and years of use when maintained properly.

If any section of the manual is not understood, contact your nearest Independent Authorized Service Dealer (IASD), or contact Generac Customer Service at 1-888-GENERAC (1888-436-3722), or http://www.generac.com/ with any questions or concerns.

The owner is responsible for proper maintenance and safe use of the equipment. Before operating, servicing or storing this power washer:

• 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.

Save these instructions for future reference. ALWAYS supply this manual to any individual that will use this machine. 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 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, verify that it is safe for others. Also make sure the procedure, work method or operating technique utilized does not render the equipment unsafe. Throughout this publication, and on tags and decals affixed to the generator, 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:

Owner’s Manual for Power Washer 1

NOTE: Notes contain additional information important to a procedure and will be found within the regular text 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.

Introduction and Safety

Asphyxiation. Running engines produce carbon monoxide, a colorless, odorless, poisonous gas. Carbon monoxide, if not avoided, will result in death or serious injury.

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DANGER

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DANGER

Electrocution. Water contact with a power source, if not avoided, will result in death or serious injury.

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DANGER

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.

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Fluid Injection. This machine produces high-pressure fluid streams that can pierce skin. Fluid injection could result in death or serious injury.

WARNING

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WARNING

Risk of Fire. Hot surfaces could ignite combustibles, resulting in fire. Fire could result in death or serious injury.

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WARNING

Vision Loss. Eye goggles are required to be worn when using this machine. Failure to wear eye goggles could result in permanent vision loss.

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WARNING

Hearing Loss. Hearing protection is recommended when using this machine. Failure to wear hearing protection could result in permanant hearing loss.

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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.

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WARNING

Risk of Fire. Verify machine has properly cooled before installing cover and storing machine. Hot surfaces could result in fire.

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WARNING

Moving Parts. Keep clothing, hair, and appendages away from moving parts. Failure to do so could result in death or serious injury.

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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.

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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.

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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.

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WARNING

Consult Manual. Read and understand manual completely before using product. Failure to completely understand manual and product could result in death or serious injury.

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WARNING

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.

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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

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.

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WARNING

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.

Safety Symbols and Meanings

2 Owner’s Manual for Power Washer

Section 2 General Information and Setup

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WARNING

Consult Manual. Read and understand manual completely before using product. Failure to completely understand manual and product could result in death or serious injury.

Table 2-1. Power Washer Components

A Spray Gun B Lance with Quick Connect C High-Pressure Hose D Recoil Starter E Oil Fill F Air Filter G High-Pressure Pump H Thermal Relief Valve

I Engine On/Off Switch

J Unloader Valve K High-pressure Outlet L Water Inlet M Fuel Tank N Fuel On/Off Valve O Choke PBelt Guard R Nozzles S Adjustable Side Handle T Oil Drain Plug U Serial Number Location.

Identification Label (not shown) – located

Owner’s Manual for Power Washer 3

on engine blower housing Detergent Siphoning Tube/Filter (not

shown)

Figure 2-1.Features and Controls

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 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 verify 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:

• Removal or alteration of any part of the intake, fuel, or exhaust systems.

• Altering or defeating the governor linkage or speed-adjusting mechanism to cause the engine to operate outside its design parameters.

Have the engine inspected and repaired by a

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WARNING

Consult Manual. Read and understand manual completely before using product. Failure to completely understand manual and product could result in death or serious injury.

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servicing dealer if these symptoms develop:

• Hard starting or stalling after starting

• Rough idle

• Misfiring or backfiring under load

• Afterburning (backfiring)

• Black exhaust smoke or high fuel consumption

NOTE: Maintenance, replacement, or repair of emissions control devices and systems may be performed by a small engine repair establishment or individual. To be covered by warranty, all emissions control service work must be performed by a factory authorized dealer. See emissions warranty for further details.

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 & Filter

• Spray Gun

• Lance with Quick Connect Fitting

• Oil Bottle

• Parts Bag (includes):

– Owner’s Manual – Owner’s Registration Card – Bag of Colored Nozzles

3. Call Generac Customer Service 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.

Figure 2-2.Insert Nozzles (number may

2. Place spray gun and nozzle extension into spray gun holder.

vary)

3. See Figure 2-3 Attach siphon tube.

Figure 2-3.Siphon Tube Location

Add Engine Oil

1. Place power washer on a flat, level surface.

2. Clean area around oil fill and remove orange oil fill cap/dipstick (Figure 2-4).

Assembly

Call Generac Customer Service at 1-888-4363722 for any assembly issues or concerns. Please have model and serial number available.

1. Insert color-coded nozzles in spaces provided (Figure 2-2).

3. Using oil funnel (optional), slowly pour oil

NOTE: On some units there is more than one oil fill location. In these instances it is only necessary to use one of the oil fill points.

4. Check periodically until the oil level is

4 Owner’s Manual for Power Washer

Figure 2-4.Fill Engine Oil

into oil fill opening. See Engine Oil

Recommendations.

between "L" and "H" on the dipstick (Figure 2-5). DO NOT OVERFILL.

NOTE: Any attempt to crank or start the

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DANGER

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.

000117

engine before it has been properly serviced with the recommend oil may result in engine failure.

5. Replace oil fill cap/dipstick and fully tighten.

Figure 2-5.Safe Operating Range

Check Pump Oil

1. Place power washer on a flat, level surface.

2. Clean area around oil fill and remove vented cap/dipstick (Figure 2-1).

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.

• DO NOT use E85.

• DO NOT use a gas oil mix.

• DO NOT modify engine to run on alternate fuels.Stabilize fuel prior to storage.

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. Clean area around fuel cap and remove

cap slowly.

4. Slowly add recommended fuel. Do not

overfill.

Figure 2-6.Check Pump Oil

3. Check to confirm oil level is within the markings on the dipstick (Figure 2-5). If oil is required, see Maintenance section. DO

NOT OVERFILL.

4. See Preventive Maintenance for additional information.

5. Install oil dipstick until finger tight.

6. Clean up any spilled oil.

Figure 2-7.Pump Oil Dipstick

Owner’s Manual for Power Washer 5

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 (38 ºC).

• 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).

• DO NOT use a one-way valve, vacuum breaker, or check valve in any part of the water supply.

Figure 2-8.Add Recommended Fuel

Connect Water Supply

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1. Remove and discard shipping cap from the pump water inlet.

2. Run water supply for 30 seconds prior to connection to eliminate debris.

3. See Figure 2-9. 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 2-9.Connect Water Supply

4. Connect water supply hose to pump water inlet (A) and hand-tighten.

5. Connect high-pressure hose to pump (B).

Connect Lance and HighPressure Hose to Spray Gun

1. See Figure 2-10. Connect lance to spray gun and hand-tighten.

Spray Gun

Become familiar with spray gun trigger and locking system prior to use.

See Figure 2-12. With unit OFF, hold spray gun and squeeze trigger to learn how trigger mechanism and locking system can be activated and deactivated.

Figure 2-12.Spray Gun (Typical)

3. Turn ON the water, squeeze the trigger to purge the pump system of air.

4. Verify spray gun is OFF with lock engaged before starting power washer.

How to Use Nozzles

1. See nozzle selection guide and select correct nozzle for task.

2. See Figure 2-13. Pull back quick–connect collar and install nozzle.

Figure 2-10.Connect Lance

2. See Figure 2-11. Connect high-pressure hose to base of spray gun.

Figure 2-11.Connect High-Pressure Hose

6 Owner’s Manual for Power Washer

to Spray Gun

3. Release quick-connect collar to secure

4. Verify nozzle is locked in place.

Figure 2-13.Insert Nozzle

nozzle.

Blast

Pressure

Nozzle

(Red) Strip

Pressure

Nozzle

(Yellow)

Clean

Pressure

Nozzle (Green)

Wash

Pressure

Nozzle (White)

Detergent

Nozzle (Black)

Nozzle Selection Guide

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.).

MEDIUM - Higher pressure and medium flow for removing stains on hard porous surfaces such as concrete driveways, garage floors and brick patios.

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.

DELICATE - Lower pressure and higher flow for gentle cleaning of cars/trucks, boats, RV’s, patio furniture, lawn equipment, etc.

DETERGENT ONLY (BLACK), Only use power washer safe detergents/soaps to help break down stubborn dirt and grime on a variety of surfaces.

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Owner’s Manual for Power Washer 7

Operation

Asphyxiation. Running engines produce carbon monoxide, a colorless, odorless, poisonous gas. Carbon monoxide, if not avoided, will result in death or serious injury.

(000103)

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.

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OFF

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Section 3 Operation

Operation and Use Questions

Call Generac customer service at 1-888-4363722 with questions or concerns about unit operation and maintenance.

Before Starting Engine

1. Verify engine oil level is correct.

2. Verify fresh fuel level is correct.

3. Verify all fittings and couplers are properly secured.

4. Verify sufficient water supply is properly connected.

5. Verify unit is secure on level ground, with proper clearance and is in a well ventilated area.

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

• Only use the unit outdoors. Verify exhaust gas does not enter a confined area through windows, doors, 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

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.

1. Connect a sufficient water supply.

2. See Figure 3-2. Move fuel valve (B) to ON.

3. Move choke lever (A) to CLOSE.

Figure 3-2.Fuel Valve and Choke

NOTE: For warm engine, verify choke lever is

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.

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.

8 Owner’s Manual for Power Washer

in OPEN position.

4. See Figure 3-3. Turn engine switch ON.

Figure 3-3.Engine Switch

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5. Relieve spray gun pressure.

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WARNING

Vision Loss. Eye goggles are required to be worn when using this machine. Failure to wear eye goggles could result in permanent vision loss.

(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.

(000117c)

WARNING

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000127

(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.

(000106b)

Fluid Injection. This machine produces high-pressure fluid streams that can pierce skin. Fluid injection could result in death or serious injury.

WARNING

6. Secure unit from movement when pulling

recoil.

7. See Figure 3-4. Firmly grasp the recoil

handle. Pull slowly until resistance is felt. Then pull rapidly to start engine.

After engine-start attempt, if engine fails to run, always point spray gun in safe direction, and squeeze spray gun trigger to release high-pressure.

Operation

Figure 3-5.Fuel Valve and Choke

• If engine fails to start after six pulls, move choke lever to OPEN position, and repeat steps 6 through 9.

Power Washer Shut Down

Figure 3-4.Engine Recoil

8. Return recoil handle slowly. DO NOT let recoil snap back against recoil housing.

9. See Figure 3-5. When engine starts, slowly move choke lever to OPEN position (A) as engine warms. If engine falters, move choke lever to CLOSE position, then to OPEN position.

Owner’s Manual for Power Washer 9

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. Turn engine switch OFF.

3. Squeeze spray gun trigger and release high-pressure water.

4. Engage trigger lock.

5. Turn water supply OFF.

NOTE: Keep high-pressure hose connected to pump and spray gun while system is pressurized.

Operation

(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

(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.

Apply Detergent

NOTE: DO NOT use caustic liquid with power

washer. Use ONLY power washer safe detergents. Follow manufacturer instructions on detergent label.

Apply detergent as follows:

1. Prepare detergent solution as required by job.

2. Make sure siphoning tube remains fully submerged into the detergent.

3. When inserting the siphon into a detergent solution bottle, route the tube so as to keep it from inadvertently contacting the hot muffler.

4. Verify black detergent nozzle is installed.

NOTE: Detergent cannot be applied with highpressure nozzle (Yellow, White, Green or Red). Only use black nozzle with detergent.

5. Start engine.

6. Firmly grasp spray gun with both hands when using high-pressure spray to avoid injury when spray gun kicks back.

7. Apply a high-pressure spray to a small area and then inspect surface for damage. If no damage is found, continue to apply detergent.

8. 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.

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. Firmly grasp spray gun with both hands when using high-pressure spray to avoid injury when spray gun kicks back.

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 nozzle extension.

3. Select and install black detergent nozzle.

4. Flush for 1-2 minutes.

5. Shut 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. Shut engine OFF.

2. Turn water supply OFF.

3. Point spray gun in a safe direction, and squeeze trigger to relieve trapped pressure.

4. Let engine cool.

5. 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.

6. Verify engine start switch and fuel valve is OFF.

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 section.

10 Owner’s Manual for Power Washer

Automatic Cool Down System (Thermal Relief)

When power washer runs for 3-5 minutes without spray gun activation, circulating water in pump can reach temperatures above 133°F (56.1 ºC). Thermal relief system engages to cool pump by discharging warm water onto ground.

Operation

Owner’s Manual for Power Washer 11

Maintenance and Troubleshooting

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.

NOTE: All required service and adjustments should be each season, as detailed in

Maintenance Schedule.

Maintenance Schedule

Follow maintenance schedule intervals, whichever occurs first according to use.

NOTE: Adverse conditions will require more frequent service.

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 Inspect pump oil level

Every 50 Hours or Every Season

Check/clean water inlet screen** Check/clean air filter** Change pump oil** Change engine oil** Inspect muffler and spark arrester*

Every 100 Hours or Every Season

Service spark plug

* Clean if clogged. Replace if perforated or

torn.

** Service more often under dirty or dusty

conditions.

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

See Figure 4-1. NOTE: Replace spray gun immediately if it

fails any test steps.

1. Verify spray gun hose connection is secure.

2. Squeeze and release trigger.

NOTE: Trigger should spring back into place and lock when released.

12 Owner’s Manual for Power Washer

Figure 4-1.Test Spray Gun (typical)

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(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

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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.

5. See Figure 4-3. Remove lance from spray gun and back flush thoroughly.

6. Install nozzle on lance.

7. Install lance on spray gun.

Maintenance and Troubleshooting

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.

Change Pump Oil

1. Clean area around oil drain plug (Figure 2-

1).

2. Place a small pan under oil drain plug to catch oil.

3. Remove oil drain plug. Drain oil completely.

4. Install oil drain plug. Do not over tighten.

5. Clean area around pump oil dipstick.

6. Fill pump with SAE 15W40 non-detergent oil. Oil level must be within markings on dipstick (Figure 2-5). Do not overfill.

7. Install oil dipstick until finger tight.

8. Clean up any spilled oil.

Figure 4-4.Drain Pump Oil

Figure 4-5.Pump Oil Dipstick

Belt Replacement

Figure 4-2.Remove Debris

Figure 4-3.Back Flush Lance

Owner’s Manual for Power Washer 13

It may be necessary to replace belt if it breaks or if there is a sudden loss of pressure:

1. Remove belt guard

2. See Figure 4-6. Loosen nuts (A) and tensioning bolt (B).

Maintenance and Troubleshooting

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SAE 30*

5W-30

10W-30**

000115

Figure 4-6.Loosen Nuts

3. Push pump toward engine (Figure 4-7).

Figure 4-7.Push Pump Toward Engine

4. Remove old belt and install new belt.

5. See Figure 4-8 Pull pump away from engine so bolt is approximately 2/3 of the way through the pump bracket slot (A). Tighten bolt.

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 4-9. 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 4-10. Remove oil fill cap and wipe dipstick clean.

Figure 4-8.Pull Pump Away From Engine

6. Tighten tensioning bolt (B) (page 14). The pulleys should be aligned within 1° of each other and the new belt should be tensioned to ~90.5 lbs. (1/8” deflection under 8.3 lbs. with a tension gauge).

7. Tighten all four nuts (A) (page 14).

8. Replace belt guard before running unit.

14 Owner’s Manual for Power Washer

Figure 4-10. Engine Oil Fill

4. See Figure 4-11. Screw dipstick into filler neck.Verify proper oil level on dipstick.

Figure 4-11. Safe Operating Range

000116

000276

000277

5. Add recommended engine oil as necessary.

6. Replace oil fill cap 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.

5. See Figure 4-12. Remove oil drain plug (A) and drain oil completely into a suitable container.

6. Install oil drain plug and tighten securely.

7. See Figure 4-11. Slowly pour oil into oil fill opening until oil level is between L and H marks on dipstick. DO NOT overfill.

8. Install oil fill cap, and finger tighten.

9. Wipe up any spilled oil.

10. Properly dispose of oil in accordance with all applicable regulations.

Maintenance and Troubleshooting

Air Filter

Engine will not run properly 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. See Figure 4-13. Remove air cleaner cover (A).

2. Remove filter element(s) (B).

3. Inspect filter element(s) and replace if damaged. To order replacements, contact Generac Customer Service at 1-888GENERAC (888-436-3722) for the name of your nearest IASD.

4. Clean foam filter element 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.

Figure 4-13.Air Filter Assembly

Service Spark Plug

To service spark plug:

1. Clean area around spark plug.

2. Remove and inspect spark plug.

3. See Figure 4-14. Inspect electrode gap with wire feeler gauge and replace spark plug if gap (A) is not within specification listed on Product Specifications Sheet.

Figure 4-12.Oil Drain Plug

Owner’s Manual for Power Washer 15

Maintenance and Troubleshooting

000134a

(000102)

WARNING

Accidental Start-up. Disconnect spark plug wire when working on unit. Failure to do so could result in death or serious injury.

000135

000136

(000105)

DANGER

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.

(000109)

WARNING

Risk of Fire. Verify machine has properly cooled before installing cover and storing machine. Hot surfaces could result in fire.

Figure 4-14. 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.

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.

16 Owner’s Manual for Power Washer

Inspect Spark Arrestor Screen (if equipped)

1. Loosen fasteners and remove heat shield from muffler. See Figure 4-15.

2. Loosen fasteners and remove spark arrester from muffler. See Figure 4-16.

3. Inspect spark arrester. Replace if torn, perforated or otherwise damaged (part number 0K1851).

4. If screen is not damaged, clean it with a commercial solvent and replace.

Figure 4-15.Heat Shield Fasteners

Figure 4-16.Spark Arrestor Fasteners

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.

Maintenance and Troubleshooting

• Replace fuel container if rust is present. Rust in fuel will cause fuel system problems.

• 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.

Winter Storage

NOTE: If pump saver is not available, connect

a 3-foot section of garden hose to water inlet adapter. Pour RV-antifreeze (antifreeze without alcohol) into hose. Pull recoil handle twice. Disconnect 3-foot hose.

• Store unit in a clean and dry area.

NOTE: If not using power washer for more than 30 days, prepare engine and pump for storage.

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.

Protect unit from freezing temperatures as follows:

1. Shut 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 RVantifreeze (alcohol free antifreeze) into hose. Pull recoil handle twice. Disconnect hose.

10. Store unit in a clean and dry area.

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.

Owner’s Manual for Power Washer 17

Maintenance and Troubleshooting

Troubleshooting

PROBLEM CAUSE CORRECTION

Pump fails to produce pressure, has erratic pressure, chattering, loss of pressure, low water volume.

Detergent fails to mix with spray.

Engine runs well at no-load, but bogs when load is applied.

Engine will not start, or starts and runs rough.

Engine shuts down during operation/

Engine lacks power. 1. Dirty air filter. 1. Replace air filter.

1. Low pressure nozzle installed.

2. Water inlet is obstructed.

3. Inadequate water supply.

4. Inlet hose kinked or

leaking.

5. Clogged hose inlet screen.

6. Water supply is over 100 ºF

(37.8 ºC).

7. High-pressure hose is

obstructed, or leaks.

8. Spray gun leaks.

9. Nozzle is obstructed.

10. Pump is faulty.

11. B elt is wor n

1. Detergent siphoning tube is not submerged.

2. Detergent siphoning tube/

filter is obstructed or cracked.

3. High-pressure nozzle

installed.

1. Engine speed too low. 1. Contact authorized

1. Low oil level, “Oil Alert System”.

2. Dirty air filter.

3. Out of fuel

4. Stale fuel.

5. Spark plug wire not

connected to plug.

6. Bad spark plug.

7. Water in fuel.

8. Excessively rich fuel

mixture.

9. Engine switch OFF.

1. Out of fuel. 1. Fill fuel tank.

1. Replace with high-pressure nozzle.

2. Clean inlet.

3. Provide adequate water

flow.

4. Straighten inlet hose, patch

leak.

5. Inspect and clean inlet

hose screen.

6. Provide cooler water

supply.

7. Clear obstructions or

replace hose.

8. Replace spray gun.

9. Clean nozzle.

10. Contact authorized

servicing dealer.

11. Contact local service

facility to replace belt

1. 1. Insert detergent siphoning tube into detergent.

2. Clean or replace filter/

detergent siphoning tube.

3. Install low-pressure nozzle.

servicing dealer.

1. Fill crankcase to proper level.

2. Clean or replace air filter.

3. Fill fuel tank.

4. Replace with fresh fuel.

5. Connect wire to spark plug.

6. Replace spark plug.

7. Drain fuel tank, replace

with fresh fuel.

8. Contact authorized

servicing dealer.

9. Turn engine switch ON.

18 Owner’s Manual for Power Washer

Notes

Owner’s Manual for Power Washer 19

20 Owner’s Manual for Power Washer

+ 50 hidden pages

Generac Power Systems Pro 6712 Operator's Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Table of Contents

Section 1 Introduction and Safety

Introduction

Safety Rules

Safety Symbols and Meanings

Section 2 General Information and Setup

Know Your Power Washer

Emissions Information

Remove Contents from Carton

Add Engine Oil

Assembly

Check Pump Oil

Fuel

Water Supply

Connect Water Supply

Spray Gun

How to Use Nozzles

Section 3 Operation

Operation and Use Questions

Before Starting Engine

Prepare Power Washer for Use

Apply Detergent

Rinsing

Clean Detergent Siphoning Tube

Automatic Cool Down System (Thermal Relief)

Section 4 Maintenance and Troubleshooting

Maintenance

Maintenance Schedule

Preventive Maintenance

Engine Maintenance

Service Spark Plug

Storage

Troubleshooting

Notes