Predator 9500 Watt, 57080 - SUPER QUIET Inverter Generator Manual

Table of Contents

Contents

1 Specifications
2 WARNING SYMBOLS AND DEFINITIONS
3 Symbol Definitions
4 IMPORTANT SAFETY INSTRUTIONS
5 Set up
6 Operation
7 Maintenance
8 Troubleshooting
9 Documents / Resources
- 9.1 References
- 9.2 Download manual

Specifications

Generator	Output	120/240 V AC, 60 H z, 63.3 / 31.7 A, 1 Phase 12 V DC, 8 A (nominal) 5V USB, 3.1A 7600 Running Watts 9500 Maximum Starting Watts
	Receptacles	2 x GFCI NEMA #5-20R (3-prong, 120 V AC) 1 x NEMA #L5-30R (3-prong, 120 V AC) 1x NEMA #L14-30R (4-prong, 120/240 VAC) 1 x 12 V DC Two Pin Outlet 2 x USB-A Outlets Parallel Kit Terminals
Displacement		459 c c
Compression Ratio		8.5:1
Engine Type		Horizontal Single Cylinder 4-stroke, OHV
Cooling System		Forced air cooled
Fuel	Type	87+ octane, stabilizer-treated unleaded gasoline
	Capacity	6.60 Gallon / 25.00 Liter
Engine Oil	Type SAE	10W-30
	Capacity	37 fl. oz.
Run Time @ 25% Load with full tank		18.5 hr.
Sound Level at 23 feet, 25% load		67 dB
Bore x Stroke		92mm x 69mm
Spark Plug	Type	BPR6ES (NGK) or equivalent
	Gap	0.027"– 0.031"
Valve Clearance	Intake	0.0039"– 0.0059"
	Exhaust	0.0059"– 0.0078"
Engine Speed		2560 - 3410 RPM

The emissions control system for this Engine is warranted for standards set by the U.S. Environmental Protection Agency and by the California Air Resources Board (also known as CARB).

WARNING SYMBOLS AND DEFINITIONS

	This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death.
	Indicates a hazardous situation which, if not avoided, will result in death or serious injury.
	Indicates a hazardous situation which, if not avoided, could result in death or serious injury.
	Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.
NOTICE	Addresses practices not related to personal injury.

Symbol Definitions

Symbol	Property or Statement
RPM	Revolutions Per Minute
HP	Horsepower
AWG	American Wire Gauge
	WARNING marking concerning Risk of Eye Injury. Wear ANSI-approved safety goggles with side shields.
	Read the manual before set-up and/or use.
	WARNING marking concerning Risk of Hearing Loss. Wear hearing protection.
	WARNING marking concerning Risk of Respiratory Injury. Operate engine OUTSIDE and far away from windows, doors, and vents.
	WARNING marking concerning Risk of Fire while handling fuel. Do not smoke while handling fuel.
	WARNING marking concerning Risk of Fire. Do not refuel while operating. Keep flammable objects away from engine.

IMPORTANT SAFETY INSTRUTIONS

warning Read all instructions.
burn hazard Failure to follow all instructions listed below may result in fire, serious injury and/or DEATH.
The warnings and precautions discussed in this manual cannot cover all possible conditions and situations that may occur. It must be understood by the operator that common sense and caution are factors which cannot be built into this product, but must be supplied by the operator.
SAVE THESE INSTRUCTIONS

Using a generator indoors CAN KILL YOU IN MINUTES.
Generator exhaust contains carbon monoxide. This is a poison you cannot see or smell.

NEVER use inside a home or garage, EVEN IF doors and windows are open.

Only use OUTSIDE and far away from windows, doors, and vents.

When unpacking, make sure that the product is intact and undamaged. If any parts are missing or broken, please call 1-888-866-5797 as soon as possible.

Setup precautions

Gasoline fuel and fumes are flammable, and potentially explosive. Use proper fuel storage and handling procedures. Do not store fuel or other flammable materials nearby.
Have multiple ABC class fire extinguishers nearby.
Operation of this equipment may create sparks that can start fires around dry vegetation. A spark arrestor may be required. The operator should contact local fire agencies for laws or regulations relating to fire prevention requirements.
Set up and use only on a flat, level, well-ventilated surface.
All connections and conduits from the Generator to the load must only be installed by trained and licensed electricians, and in compliance with all relevant local, state, and federal electrical codes and standards, and other regulations where applicable.
Connections for standby power to a building electrical system must be made by a qualified electrician. The connection must isolate the Generator power from utility power, and must comply with all applicable laws and electrical codes.
A transfer switch should be installed by a licensed electrician in compliance with all applicable laws and electrical codes.
Wear ANSI-approved safety goggles, heavy-duty work gloves, and dust mask/respirator during set up.
Use only lubricants and fuel recommended in the Specifications chart of this manual.
Improper connections to a building electrical system can allow electrical current from the Generator to backfeed into the utility lines. Such backfeed may electrocute utility company workers or others who contact the lines during a power outage, and the Generator may explode, burn, or cause fires when utility power is restored. Consult the utility company and a qualified electrician if intending to use the Generator for back up power.
Do not operate the Generator before grounding. The Generator must be earth-grounded in accordance with all relevant electrical codes and standards before operation.
Install carbon monoxide alarm(s) with battery backup in nearby buildings according to manufacturer's instructions.

Operating precautions

CARBON MONOXIDE HAZARD
Using a generator indoors CAN KILL YOU IN MINUTES.
Generator exhaust contains carbon monoxide. This is a poison you cannot see or smell.

NEVER use inside a home or garage, EVEN IF doors and windows are open.

Only use OUTSIDE and far away from windows, doors, and vents.
CARBON MONOXIDE SHUTOFF
TO PREVENT SERIOUS INJURY AND DEATH FROM CARBON MONOXIDE INHALATION:
The Carbon Monoxide sensor is an additional layer of protection only. Do not use the Generator in any area or situation that will allow carbon monoxide to accumulate.

FLASHING RED LIGHT:
Dangerous levels of carbon monoxide gas have built up and generator will shutoff. Leave immediately until area has aired out. Move Generator to well-ventilated area before operation.
FLASHING YELLOW LIGHT:
Carbon monoxide sensor malfunction.
Sensor needs service. Do not use the Generator until the sensor is working properly. For technical questions, please call 1-888-866-5797. NOTE: Yellow light flashes once after starting to indicate passing selfcheck and is functioning normally.

Carbon Monoxide sensor must only be serviced by qualified technician to restore it to original settings. Do not modify or tamper with the Carbon Monoxide sensor. not following these instructions can result in death or serious injury due to Carbon Monoxide sensor malfunction.

Never use a generator indoors, including in garages, basements, crawl spaces and sheds. Opening doors and windows or using fans will NOT prevent carbon monoxide build up in the home.
When using generators, keep them outdoors and far away from open doors, windows, and vents to avoid toxic levels of carbon monoxide from building up indoors.
If you start to feel sick, dizzy, or weak while using a generator, get to fresh air right away. The carbon monoxide from generators can quickly lead to full incapacitation and death.
Keep children away from the equipment, especially while it is operating.
Keep all spectators at least six feet from the engine during operation.
Do not fill gas tank while engine is running. Do not operate if gasoline has been spilled.
Clean spilled gasoline before starting engine. Do not operate near pilot light or open flame.
Do not touch engine during use. Let engine cool down after use.
Never store fuel or other flammable materials near the engine.
If the plugged in product operates abnormally or unusually slow, immediately stop using the generator as a power source. Read and adhere to the instruction manual of the product to be powered to make sure that it can be safely and efficiently powered by a portable generator.
Before connecting an appliance or power cord to the generator: Make sure that it is in good working order. Faulty appliances or power cords can create a potential for electrical shock.
Do not exceed the running wattage of the generator. Make sure that the total electrical rating of the all of the tools or appliances plugged into the generator at the same time does not exceed that of the generator. Check that the startup surge will not be beyond the limit of the generator.
Avoid substantially overloading which will trip the circuit breaker. Slightly overloading the generator may not trip the circuit breaker, but will lead to premature generator failure.
Do not attempt to connect or disconnect load connections while standing in water, or on wet or soggy ground.
Do not touch electrically energized parts of the generator and interconnecting cables or conductors with any part of the body, or with any non-insulated conductive object.
Connect the generator only to a load that is compatible with the electrical characteristics and running wattage of the generator.
Insulate all connections and disconnected wires.
Guard against electric shock.
Prevent body contact with grounded surfaces such as pipes, radiators, ranges, and refrigerators.
Only use a suitable means of transport and lifting devices with sufficient weight bearing capacity when transporting the generator.
Secure the generator on transport vehicles to prevent it from rolling, slipping, and tilting.
Industrial applications must follow OSHA requirements.
Do not leave the generator unattended when it is running. Turn off the generator (and remove safety keys, if available) before leaving the work area.
The generator can produce high noise levels. Prolonged exposure to noise levels above 85 dBA is hazardous to hearing. Wear ear protection when operating the generator or when working nearby while it is operating.
Keep access doors on enclosures locked.
Wear ANSI-approved safety glasses and hearing protection during use.
People with pacemakers should consult their physician(s) before use. Electromagnetic fields in close proximity to a heart pacemaker could cause pacemaker interference or pacemaker failure. Caution is necessary when near the engine's magneto or recoil starter.
Use only accessories that are recommended by Harbor Freight Tools for your model. Accessories that may be suitable for one piece of equipment may become hazardous when used on another piece of equipment.
Do not operate in explosive atmospheres, such as in the presence of flammable liquids, gases, or dust. Gasoline-powered engines may ignite the dust or fumes.
Stay alert, watch what you are doing and use common sense when operating this generator. Do not use while tired or under the influence of drugs, alcohol or medication.
Dress properly. Do not wear loose clothing or jewelry. Keep hair, clothing and gloves away from moving parts. Loose clothes, jewelry or long hair can be caught in moving parts.
Parts, especially exhaust system components, get very hot during use. Stay clear of hot parts.
Do not cover the generator during operation.
Keep the generator and surrounding area clean at all times. Keep generator at least 5 feet from combustible objects.
Do not smoke, or allow sparks, flames, or other sources of ignition around the equipment, especially when refuelling.
Use the equipment, accessories, etc., in accordance with these instructions and in the manner intended for the particular type of equipment, taking into account the working conditions and the work to be performed. Use of the equipment for operations different from those intended could result in a hazardous situation.
Do not operate the equipment with known leaks in the engine's fuel system.
When spills of fuel or oil occur, they must be cleaned up immediately. Dispose of fluids and
Do not reach over or across equipment while operating. by poorly maintained equipment.
Keep hands and feet away from moving parts. Do not reach over or across equipment while operating.
Before use, check for misalignment or binding of moving parts, breakage of parts, and any other condition that may affect the equipment's operation.
if damaged, have the equipment serviced before using. Many accidents are caused by poorly maintained equipment.
Use the correct equipment for the application. Do not modify the equipment and do not use the equipment for a purpose for which it is not intended.
Extension Cord - Make sure your extension cord is in good condition. When using an extension cord, be sure to use one heavy enough to carry the current your product will draw. An undersized extension cord will cause a drop in line voltage resulting in loss of power and overheating.
The table below shows the correct cord size to use depending on cord length and nameplate ampere rating. If in doubt, use the next heavier gauge.
The smaller the gauge number, the heavier the cord.

RECOMMENDED MINIMUM WIRE GAUGE FOR EXTENSION CORDS
CURRENT (AMPS)	Load @ 120V (WATTS)	Load @ 240V (WATTS)	0 ~ 50 ft	50 ~ 75 ft	75 ~ 100 ft
2	240	480	18 AWG
4	480	960	18 AWG		16 AWG
6	720	1440	18 AWG	16 AWG	14 AWG
8	960	1920	16 AWG		12 AWG
10	1200	2400	16 AWG	14 AWG	12 AWG
15	1800	3600	14 AWG	12 AWG	10 AWG
20	2400	4800	12 AWG	10 AWG
25	3000	6000	12 AWG	10 AWG	8 AWG
30	3600	7200	10 AWG	8 AWG
35	4200	8400	8 AWG	6 AWG
40	4800	9600	6 AWG

Parallel Kit Precautions

burn hazard
TO PREVENT SERIOUS INJURY, DEATH, AND GENERATOR AND/OR EQUIPMENT DAMAGE FROM ELECTRIC SHOCK AND FIRE:

Follow parallel Kit instructions provided with Kit for connection and use of a parallel Kit.
Only connect two identical Inverter Generators together using a Parallel Kit.
Connect Parallel Kit only to terminals marked "Parallel Outlets" on the front of the Generator.
Do not remove or connect a Parallel Kit while the Generator is running.
Do not use a Parallel Kit that is attached to only one Generator.

Service precautions

Before service, maintenance, or cleaning:
1. unplug all devices from the generator.
2. Turn the Combination Switch to its "OFF" position.
3. Disconnect the negative battery terminal.
4. allow the engine to completely cool.
5. Then, remove the spark plug cap from the spark plug.
Keep all safety guards in place and in proper working order. Safety guards include muffler, air cleaner, mechanical guards, and heat shields, among other guards.
Keep all electrical equipment clean and dry.
Replace any wiring where the insulation is cracked, cut, abraded, or otherwise degraded. Replace terminals that are worn, discolored, or corroded. Keep terminals clean and tight.
Do not alter or adjust any part of the equipment or its engine that is sealed by the manufacturer or distributor. Only a qualified service technician may adjust parts that may increase or decrease governed engine speed.
Wear ANSI-approved safety goggles, heavy-duty work gloves, and dust mask/respirator during service.
Maintain labels and nameplates on the equipment.
These carry important information.
If unreadable or missing, contact Harbor Freight Tools for a replacement.
Have the equipment serviced by a qualified repair person using only identical replacement parts. This will ensure that the safety of the equipment is maintained. Do not attempt any service or maintenance procedures not explained in this manual or any procedures that you are uncertain about your ability to perform safely or correctly.
Store equipment out of the reach of children.
Follow scheduled engine and equipment maintenance.

Refueling:

Do not refill the fuel tank while the engine is running or hot.
Do not smoke, or allow sparks, flames, or other sources of ignition around the equipment, especially when refuelling.
Do not fill fuel tank to the top.
Leave a little room for the fuel to expand as needed.
Refuel in a well-ventilated area only.
Wipe up any spilled fuel and allow excess to evaporate before starting engine.
To prevent FIRE, do not start the engine while the smell of fuel hangs in the air.

warning SAVE THESE INSTRUCTIONS

Set up

warning Read the ENTIRE IMPORTANT SAFETY INFORMATION section at the beginning of this manual including all text under subheadings therein before set up or use of this product.

burn hazard
TO PREVENT SERIOUS INJURY AND FIRE: Operate only with proper spark arrestor installed.
Operation of this equipment may create sparks that can start fires around dry vegetation.
A spark arrestor may be required.
The operator should contact local fire agencies for laws or regulations relating to fire prevention requirements.

At high altitudes, the engine's carburetor, governor, and any other parts that control the fuel-air ratio will need to be adjusted by a qualified mechanic to allow efficient high-altitude use and to prevent damage to the engine and any other devices used with this product.

Grounding

The Generator must be properly grounded in accordance with all relevant electrical codes and standards before operation. Have the unit grounded by a qualified electrician if you are not qualified to do so.
To ground the Generator, connect a #4 AWG grounding wire (not included) from the Grounding Terminal on the Control Panel to a grounding rod (not included). The grounding rod must be an earth-driven copper or brass rod (electrode) which can adequately ground the Generator.
Refer to local regulations for ground source information.

Electric Starter Battery Connection

For the electric start function, the included 12 V DC Battery must be connected before first use.

Remove the Battery Access Panel.
Make sure the black strap stretches over the top of the Battery and hooks into the Battery Platform.
Remove the covers from the Battery Terminals.
Locate the black and red battery cables.
Connect the red cable to the positive battery terminal first. Then connect the black cable to the negative battery terminal.
Replace the Battery Access Panel.

Components and Controls

Components and Controls - Control Panel
Control Panel

Components and Controls - Generator Components
Generator Components

TO PREVENT SERIOUS INJURY: Follow parallel Kit instructions for connection and use of a parallel Kit (parallel Kit and instructions sold separately).
Generator must be in 120V/240V mode for parallel function.

Operation

warning Rear the ENTIRE IMPORTANT SAFETY INFORMATION section at the beginning of this manual including all text under subheadings therein before set up or use of this product.

Pre-Start Checks

Inspect Engine and Generator looking for damaged, loose, and missing parts before set up and starting. If any problems are found, do not use equipment until fixed properly.

Checking and Filling Engine Oil

NOTICE: Generator is shipped without engine oil. Engine's crankcase MUST be filled with oil before first use. Your Warranty is VOID if the Engine's crankcase is not properly filled with oil before first use and before each use thereafter. Before each use, check the oil level. Engine will not start with low or no engine oil.

Make sure the Engine is stopped and is level.
On the left side of the Generator, loosen the Screw and remove the Oil Fill Access Door, as shown to the right.
Clean the top of the Oil Fill Cap / Dipstick and the area around it. Remove the Cap / Dipstick, turning it counterclockwise.
Check the oil level. The oil level should be up to the edge of the hole as shown.
As needed, add the appropriate type of oil until the oil level is at the proper level.
SAE 10W-30 oil is recommended for general use.
Thread the Oil Fill Cap / Dipstick back in clockwise and replace the Oil Fill Access Door.

NOTICE: Do not run the engine with too little oil. Engine will shut off if engine oil level is too low.

Checking and Filling Fuel

burn hazard
TO PREVENT SERIOUS INJURY OR FIRE:
Fill the fuel tank in a well-ventilated area away from ignition sources. If the Engine is hot from use, shut the Engine off and wait for it to cool before adding fuel. Do not smoke.

Clean the Fuel Cap and the area around it.
Unscrew and remove the Fuel Cap.
Remove the Strainer and remove any dirt and debris. Then replace the Strainer.

Note: Do not use gasoline containing more than 10% ethanol (E10). Do not use E85 ethanol. Add fuel stabilizer to the gasoline or the Warranty is VOID.

Note: Do not use gasoline that has been stored in a metal fuel container or a dirty fuel container. it can cause particles to enter the carburetor, affecting Engine performance and/or causing damage.

If needed, fill the Fuel Tank to about 1 inch under the fill neck of the Fuel Tank with 87 octane or higher unleaded gasoline that has been treated with a fuel stabilizer additive. Follow fuel stabilizer manufacturer's recommendations for use.
Replace the Fuel Cap.
Wipe up any spilled fuel and allow excess to evaporate before starting engine.
To prevent FIRE, do not start the engine while the smell of fuel hangs in the air.

Starting the Engine

warning Before Starting the Engine

inspect the generator and engine.
Disconnect all electrical loads from the generator.
Fill the engine with the proper amount and type of both stabilizer-treated unleaded gasoline and oil.

Manual Start

Turn the Economy Switch to the OFF position.
Turn the Combination Switch to the START position.
Turn the Engine Switch to the ON position.
Grip the Starter Handle of the Engine loosely and pull it slowly several times to allow the gasoline to flow into the Engine's carburetor. Then pull the Starter Handle gently until resistance is felt. Allow Cable to retract fully and then pull it quickly. Repeat until the Engine starts. Do not let the Starter Handle snap back against the housing. Hold it as it recoils so it doesn't hit the housing.
After the engine starts, allow to run for 20 seconds then turn the Combination Switch to the RUN position.

If engine does not start:

Check engine oil level.
Engine will not start with low or no engine oil.
Check spark arrestor cleanliness.
Engine will not start if spark arrestor is clogged.
For warm engine – turn Combination Switch to RUN before trying to start it again.

Note: Moving the Combination Switch too fast could stall the Engine.

Allow the Engine to run at no load for five minutes after each start-up so that the Engine can stabilize.

Electric Start

Turn the Economy Switch to the OFF position.
Turn the Combination Switch to the START position.
Turn the Engine Switch to START position to start the Engine. If Engine does not start within 3 seconds, release Starter Button. Wait at least 10 seconds, then try again.
After the engine starts, allow to run for 20 seconds then turn the Combination Switch to the RUN position.

Note: If engine does not start, check engine oil level. Engine will not start with low or no engine oil.

Note: If warm engine does not start, turn Combination Switch to RUN before trying to start it again.

Note: Moving the Combination Switch too fast could stall the Engine.

Allow the Engine to run at no load for five minutes after each start-up so that the Engine can stabilize.

CARBON MONOXIDE SHUTOFF

TO PREVENT SERIOUS INJURY ADN DEATH FROM CARBON MONOXIDE INHALATION:
The Carbon Monoxide sensor is an additional layer of protection only. Do not use the Generator in any area or situation that will allow carbon monoxide to accumulate.

FLASHING RED LIGHT Dangerous levels of carbon monoxide gas have built up. Leave immediately until area has aired out. Move Generator to well-ventilated area before operation.
FLASHING YELLOW LIGHT: Carbon monoxide sensor malfunction. Sensor needs service. Call 1-888-866-5797 as soon as possible. Do not use the Generator until the sensor is working properly.
NOTE: Yellow light flashes once after starting to indicate Yellow light flashes once after starting to indicate passing self-check and is functioning normally. passing self-check and is functioning normally.

Break-in Period

Breaking-in the Engine will help to ensure proper equipment and Engine operation.
The break-in period will last about 30 hours of use.
DO NOT exceed 75% of the Generator's running wattage during this period.

Change the engine oil after this period.

Under normal operating conditions subsequent maintenance follows the schedule explained in the MAINTENANCE section.

Nominal 12 V DC Output

Move the Economy (ESC) Switch to the OFF position.
Only use the 12 V DC receptacle to charge a 12 volt lead-acid type battery using an appropriate charge controller. (Battery and controller not included.) The 12 V DC output is not regulated.
Do not connect any device to the 12 V DC terminal that draws more than 8 amps.
If this 12 V DC circuit protection is tripped, reduce the load, and press the Reset Button next to the outlet.

Connecting 120 VAC Loads to the Unit

Calculate Power Draw

Power draw can be calculated by multiplying volts and amps. The resulting number is wattage.

Never exceed the running wattage for the Generator or any outlet amperage rating.
Refer to appliance/tool owner's manuals to determine the wattage of electrical load devices.
Long power cords and extension cords draw additional power. Keep cord length at a minimum.

Wattage Estimates

Refer to your device documentation for start-up and running wattage requirements.
Check nameplate wattages on all loads before connecting to Generator.

Plug the power cord of the 120 volt appliance/tool into the 120 V AC Outlet on the Generator. Plug in appliances from largest to smallest load.

Note: Do not allow the Generator to completely run out of fuel with devices attached. a Generator's output may sharply spike as it runs out of fuel, causing damage to attached devices.

Overload Indicator

Note: The OVERLOAD light may turn on for a few seconds as a large device starts up.
This is normal for loads approaching the capacity of this Generator.

The total combined load through the outlets on the Generator must not exceed the running power of the unit.
If the OVERLOAD light turns on and the Generator stops producing power, it has been overloaded.
Turn off and disconnect all electrical devices and stop the Engine. Compare device requirements to Generator rating and reduce the total wattage of connected devices if necessary. Move anything that may be limiting Generator ventilation away.
Check if any circuit breakers have tripped and make sure that ALL circuit breakers are reset before starting the Generator again.
Restart the Engine and reconnect devices while being careful to not overload Generator.

Low Oil indicator

If the Engine oil level is too low, the LOW OIL light turns on and the Engine will automatically shut off.
The Engine cannot be restarted until the proper amount of oil has been added. Add the appropriate type of oil until the oil level is at the proper level. SAE 10W-30 oil is recommended for general use.

NOTICE: Do not run the engine with too little oil. Engine will shut off if engine oil level is too low.

Economy (ESC) Switch

Turn the Economy (ESC) Switch ON to limit noise and fuel consumption for lighter generator loads.
Turn the Economy (ESC) Switch OFF to operate engine at full speed:
1. when starting
2. when a heavy load is applied
3. when using the 12 VDC output

Digital Display Screen

The Display Screen shows cumulative run time in hours.

Voltage Selector

The Voltage Selector allows more current to be available at 120V outlets if 240V output is not required:

Place switch at 120V only - only 120V outlets can be used.
Place switch at 120/240V: Both 120V and 240V outlets can be used.

NOTE: Do not change the switch while under load.

For parallel function, Switch position must be at 120/240V.

Stopping the Engine

To stop the Engine in an emergency, turn the Engine Switch OFF.

Under normal conditions, use the following procedure to shut off the Generator:

Turn all electrical load devices off and unplug them from the Generator. If the Economy Switch is ON, turn it to the OFF position.
Turn the Combination Switch OFF.

Maintenance

TO PREVENT SERIOUS INJURY FROM ACCIDENTAL STARTING:
Turn the Combination Switch of the equipment to its "OFF" position, wait for the engine to cool, and disconnect the spark plug cap before performing any inspection, maintenance, or cleaning procedures.

TO PREVENT SERIOUS INJURY FROM EQUIPMENT FAILURE:
Do not use damaged equipment. if abnormal noise, vibration, or excess smoking occurs, have the problem corrected before further use.

Follow all service instructions in this manual. The engine may fail critically if not serviced properly.

warning Many maintenance procedures, including any not detailed in this manual, will need to be performed by a qualified technician for safety. if you have any doubts about your ability to safely service the equipment or engine, have a qualified technician service the equipment instead.

Cleaning, Maintenance, and Lubrication Schedule

Note: This maintenance schedule is intended solely as a general guide. If performance decreases or if equipment operates unusually, check systems immediately. The maintenance needs of each piece of equipment will differ depending on factors such as duty cycle, temperature, air quality, fuel quality, and other factors.

Note: The following procedures are in addition to the regular checks and maintenance explained as part of the regular operation of the engine and equipment.

Procedure	Before Each use	Monthly or every 8 hr. of use	Every 3 mo. or 50 hr. of use	Every 6 mo. or 100 hr. of use	Yearly or every 300 hr. of use	Every 2 years
Brush off outside of engine Check engine oil level Check air filter
Change engine oil
Clean/replace air cleaner			*
Check and clean spark plug Check and clean spark arrestor
Check/adjust idle speed Check/adjust valve clearance Clean fuel tank, strainer and carburetor Clean carbon build-up from combustion chamber					**
Replace fuel line if necessary						**

*Service more frequently when used in dusty areas.
**These items should be serviced by a qualified technician.

Checking and Filling Fuel

burn hazard
TO PREVENT SERIOUS INJURY FROM FIRE:
Fill the fuel tank in a well-ventilated area away from ignition sources. If the engine is hot from use, shut the engine off and wait for it to cool before adding fuel. Do not smoke.

Clean the Fuel Cap and the area around it.
Unscrew and remove the Fuel Cap.
Remove the Strainer and remove any dirt and debris. Then replace the Strainer.

Note: Do not use gasoline containing more than 10% ethanol (E10). Do not use E85 ethanol. Add fuel stabilizer to the gasoline or the Warranty is VOID.

Note: Do not use gasoline that has been stored in a metal fuel container or a dirty fuel container. It can cause particles to enter the carburetor, affecting engine performance and/or causing damage.

If needed, fill the Fuel Tank to about 1 inch under the fill neck of the Fuel Tank with 87 octane or higher unleaded gasoline that has been treated with a fuel stabilizer additive. Follow fuel stabilizer manufacturer's recommendations for use.
Replace the Fuel Cap.
Wipe up any spilled fuel and allow excess to evaporate before starting engine.
To prevent FIRE, do not start the engine while the smell of fuel hangs in the air.

Engine Oil Change

Oil is very hot during operation and can cause burns. Wait for engine to cool before changing oil.

Make sure the Engine is stopped and is level.
On the right side of the Generator, loosen the Screws and remove the Oil Fill Access Door, as shown below.
Remove the lower Rubber Seal from underneath the Generator. See below.
Place an oil drain pan under the Generator and center under the Oil Drain Hose opening. Remove the Oil Drain Cap, tilt the Generator slightly to facilitate drainage and wait for oil to drain completely. Recycle used oil.
Clean the top of the Oil Fill Cap / Dipstick and the area around it. Remove the Cap / Dipstick, turning it counterclockwise.
Remove the upper Rubber Seal from just below the Oil Drain Plug.
Use a wrench (sold separately) to remove the Oil Drain Plug and allow the oil to drain completely.
Replace the Oil Drain Cap. Put the Oil Drain Hose back into the Generator.
Add the appropriate type of oil until the oil level is at the proper level.
SAE 10W-30 oil is recommended for general use.

Note: Make sure Generator is level when adding oil to prevent overfilling which could cause engine damage.

Check the oil level. The oil level should be up to the edge of the hole as shown.
Thread the Oil Fill Cap / Dipstick back in clockwise and replace the Oil Fill Access Door.

NOTICE: Do not run the engine with too little oil. Engine will not start with low or no engine oil.

Air Filter Element Maintenance

Loosen screws and remove the Air Filter Access Panel on the left side of the Generator.
Unsnap the Air Filter Cover Clip and remove Air Filter Cover. See figure below.
Remove Air Filter.
Cleaning:

For "paper" filter elements: To prevent injury from dust and debris, wear ANSI-approved safety goggles, NIOSH-approved dust mask/respirator, and heavy-duty work gloves. In a well-ventilated area away from bystanders, use pressurized air to blow dust out of the air filter.
For foam filter elements: Wash the element in warm water and mild detergent several times. Rinse. Squeeze out excess water and allow it to dry completely. Soak the filter in lightweight oil briefly, then squeeze out the excess oil.

Install the cleaned filter.
Secure the Air Filter Cover and replace the Access Panel before use.

Spark Arrestor Maintenance

burn hazard
TO PREVENT SERIOUS INJURY AND FIRE: Operate only with proper spark arrestor installed.

burn hazard Operation of this equipment may create sparks that can start fires around dry vegetation. a spark arrestor may be required. The operator should contact local fire agencies for laws or regulations relating to fire prevention requirements.

Allow the Generator to cool completely.
Remove the Screws from the back of the Generator.
Remove the Tail Pipe and Spark Arrestor.
Clean the Spark Arrestor using a wire brush (sold separately). Replace arrestor if damaged.
TO PREVENT SERIOUS INJURY FROM ACCIDENTAL BRUSH FIRE, secure Spark arrestor back in place immediately after cleaning and before further operation.

Spark plug Maintenance

Loosen two screws and remove the Access Panel on the left side of the Generator.
Disconnect Spark Plug Cap from end of plug. Clean out debris from around Spark Plug.
Using the Spark Plug Wrench, remove the Spark Plug.
Inspect the Spark Plug:

If the electrode is oily, clean it using a clean, dry rag. If the electrode has deposits on it, polish it using emery paper. If the white insulator is cracked or chipped, the spark plug needs to be replaced.

NOTiCE: Use only BPR6ES (NGK) type spark plug or equivalent. Using an incorrect spark plug may damage the engine.

When installing a new spark plug, adjust the plug's gap to the specification on the Specifications chart. Do not pry against the electrode, the spark plug can be damaged.
Apply anti-seize material to Spark Plug threads. Install the new spark plug or the cleaned spark plug into the engine.

Gasket-style:
Finger-tighten until the gasket contacts the cylinder head, then tighten about 1/2-2/3 turn more.
Non-gasket-style:
Finger-tighten until the plug contacts the cylinder head, then tighten about 1/16 turn more.

NOTICE: Tighten the Spark Plug properly.
If loose, the Spark Plug will cause the engine to overheat.
If overtightened, the threads in the engine block will be damaged.

Apply dielectric spark plug boot protector (not included) to the end of the spark plug and reattach the cap securely.
Replace Spark Plug Access Cover and Access Panel.

Storage

When the equipment is to remain idle for longer than 20 days, prepare the engine for storage as follows:

CLENING
Wait for engine to cool, then clean engine with dry cloth. NOTICE: Do not clean using water. The water will gradually enter the engine and cause damage.
FUEL:
Gasoline Treatment/Draining the Fuel Tank
To protect the fuel tank during storage, fill the tank with fresh gasoline that has been treated with a fuel stabilizer additive. Follow fuel stabilizer manufacturer's recommendations for use. Refer to Checking and Filling Fuel Checking and Filling Fuel.
Aged gasoline that has not been treated with stabilizer ahead of time must be safely drained away and not run through the engine.

burn hazard
TO PREVENT SERIOUS INJURY FROM FIRE:
Fill tank in a well-ventilated area away from ignition sources. If the engine is hot from use, shut the engine off and wait for it to cool before adding fuel. Do not smoke.

Draining the Carburetor
After closing the Fuel Valve, place an appropriate container under the Carburetor and carefully remove the Drain Bolt from the bottom of the Carburetor Bowl, allowing the fuel to drain completely. Replace the Drain Bolt after draining.

burn hazard
To prevent serious injury and fire, close the Fuel Valve before draining the Carburetor.

LUBRICATION:
1. Change engine oil.
2. Clean out area around spark plug. Remove spark plug and pour one tablespoon of engine oil into cylinder through spark plug hole.
3. Replace spark plug, but leave spark plug cap disconnected.
4. Pull Starter Handle to distribute oil in cylinder. Stop after one or two revolutions when you feel the piston start the compression stroke (when you start to feel resistance).
STORAGE AREA:
Cover and store in a dry, level, well-ventilated area out of reach of children. Storage area should also be away from ignition sources, such as water heaters, clothes dryers, and furnaces.

NOTICE: During extended storage periods the Engine must be started every 3 months and allowed to run for 15 – 20 minutes or the Warranty is VOID.

AFTER STORAGE:
Before starting the engine after storage, keep in mind that untreated gasoline will deteriorate quickly. Drain the fuel tank and change to fresh fuel if untreated gasoline has been sitting for a month, if treated gasoline has been sitting beyond the fuel stabilizer's recommended time period, or if the engine does not start.

Troubleshooting

Problem	Possible Causes	Probable Solutions
Engine will not start	FUEL RELATED: No fuel in tank or fuel valve closed. Choke not in START position, cold engine. Gasoline with more than 10% ethanol used. (E15, E20, E85, etc.) Low quality or deteriorated, old gasoline. Carburetor not primed. Dirty fuel passageways. Carburetor needle stuck. Fuel can be smelled in the air. Too much fuel in chamber. This can be caused by the carburetor needle sticking. Clogged Fuel Filter.	FUEL RELATED: Fill fuel tank with fresh 87+ octane stabilizer-treated unleaded gasoline and open fuel valve. Do not use gasoline with more than 10% ethanol (E15, E20, E85, etc.). Move Choke to START position. Clean out ethanol rich gasoline from fuel system. Replace components damaged by ethanol. Use fresh 87+ octane stabilizer-treated unleaded gasoline only. Do not use gasoline with more than 10% ethanol (E15, E20, E85, etc.). Use fresh 87+ octane stabilizer-treated unleaded gasoline. Do not use gasoline with more than 10% ethanol (E15, E20, E85, etc.). Pull on Starter Handle to prime. Clean out passageways using fuel additive. Heavy deposits may require further cleaning. Gently tap side of carburetor float chamber with screwdriver handle. Turn Choke to RUN position. Remove spark plug and pull the start handle several times to air out the chamber. Reinstall spark plug and set Choke to START position. Replace Fuel Filter.
	IGNITION (SPARK) RELATED: Power Switch at OFF position. Spark plug cap not connected securely. Spark plug electrode wet or dirty. Incorrect spark plug gap. Spark plug cap broken. Circuit breaker tripped (electric start models only). Incorrect spark timing or faulty ignition system.	IGNITION (SPARK) RELATED: Turn Power Switch to ON. Connect spark plug cap properly. Clean spark plug. Correct spark plug gap. Replace spark plug cap. Reset circuit breaker. Check wiring and starter motor if breaker continues to trip. Have qualified technician diagnose/ repair ignition system.
	COMPRESSION RELATED: Cylinder not lubricated. Problem after long storage periods. Loose or broken spark plug. (Hissing noise will occur when trying to start.) Loose cylinder head or damaged head gasket. (Hissing noise will occur when trying to start.) Engine valves or tappets mis-adjusted or stuck.	COMPRESSION RELATED: Pour tablespoon of oil into spark plug hole. Crank engine a few times and try to start again. Tighten spark plug. If that does not work, replace spark plug. If problem persists, may have head gasket problem, see #3. Tighten head. If that does not remedy problem, replace head gasket. Have qualified technician adjust/ repair valves and tappets.
	ENGINE OIL RELATED: Low engine oil. Engine mounted on slope, triggering low oil shutdown.	ENGINE OIL RELATED: Fill engine oil to proper level. Check engine oil before EVERY use. Operate engine on level surface. Check engine oil level.
	SPARK ARRESTOR RELATED: Spark Arrestor clogged with soot.	SPARK ARRESTOR RELATED: Clean and replace Spark Arrestor.
Engine misfires	Spark plug cap loose. Incorrect spark plug gap or damaged spark plug. Defective spark plug cap. Old or low quality gasoline. Incorrect compression.	Check cap and wire connections. Re-gap or replace spark plug. Replace spark plug cap. Use only fresh 87+ octane stabilizer-treated unleaded gasoline. Do not use gasoline with more than 10% ethanol (E15, E20, E85, etc.). Diagnose and repair compression. (Use Engine will not start: COMPRESSION RELATED section.)
Engine stops suddenly	Carbon Monoxide level high. Red light on Carbon Monoxide Sensor illuminates. CO Sensor Alarm flashes yellow continually shortly after starting. CO Sensor Alarm flashes yellow continually after longer period of operation. Low oil shutdown. Fuel tank empty or full of impure or low quality gasoline. Defective fuel tank cap creating vacuum, preventing proper fuel flow. Faulty magneto. Disconnected or improperly connected spark plug cap.	Leave area immediately and allow area to ventilate thoroughly. Only operate generator outside. Carbon monoxide sensor malfunction. Sensor needs service. Call 1-888-866-5797 as soon as possible. Do not use the Generator until the sensor is working properly. Make sure to operate generator within rated ambient temperature; maintain minimum 5 ft. clearance from all sides. Fill engine oil to proper level. Check engine oil before EVERY use. Fill fuel tank with fresh 87+ octane stabilizer treated unleaded gasoline. Do not use gasoline with more than 10% ethanol (E15, E20, E85, etc.). Test/replace fuel tank cap. Have qualified technician service magneto. Secure spark plug cap.
Engine stops when under heavy load	Dirty air filter Engine running cold.	Clean element. Allow engine to warm up prior to operating equipment.
Engine knocks	Old or low quality gasoline. Engine overloaded. Incorrect spark timing, deposit buildup, worn engine, or other mechanical problems.	Fill fuel tank with fresh 87+ octane stabilizer-treated unleaded gasoline. Do not use gasoline with more than 10% ethanol (E15, E20, E85, etc.). Do not exceed equipment's load rating. Have qualified technician diagnose and service engine.
Engine backfires	Impure or low quality gasoline. Engine too cold. Intake valve stuck or overheated engine. Incorrect timing.	Fill fuel tank with fresh 87+ octane stabilizer-treated unleaded gasoline. Do not use gasoline with more than 10% ethanol (E15, E20, E85, etc.). Use cold weather fuel and oil additives to prevent backfiring. Have qualified technician diagnose and service engine. Check engine timing.
Attached device doesn't have power	Device not plugged in properly. Circuit Breaker tripped. Product needs service.	Turn off and unplug the device, then plug it back in again and turn on. Turn off and unplug device, reset Circuit Breaker, plug in device and turn on. Have product repaired.
Attached device begins to operate abnormally	Problem with device. Rated load capacity exceeded.	Immediately unplug device. Have device repaired by a qualified technician, or replace device. Lower the number of items plugged into the generator to stay within the rated capacity, or use a more powerful generator.

warning Follow all safety precautions whenever diagnosing or servicing the generator or engine.

For technical questions, please call 1-888-866-5797.

Visit our website at: http://www.harborfreight.com
Email our technical support at: productsupport@harborfreight.com
Email our engine support at: predator@harborfreight.com

Copyright © 2020 by Harbor Freight Tools. All rights reserved.
No portion of this manual or any artwork contained herein may be reproduced in any shape or form without the express written consent of Harbor Freight Tools.
Diagrams within this manual may not be drawn proportionally. Due to continuing improvements, actual product may differ slightly from the product described herein.
Tools required for assembly and service may not be included.