Harbor Freight Tools 68122, 68123 User Manual 2

Page 1

Owner’s Manual & Safety Instructions

Save This Manual Keep this manual for the safety warnings and precautions, assembly, operating,

inspection, maintenance and cleaning procedures. Write the product’s serial number in the back of the manual near the assembly diagram (or month and year of purchase if product has no number). Keep this manual and the receipt in a safe and dry place for future reference.

173cc

Vertical Engine

Using an engine indoors CAN KILL YOU IN MINUTES.

Engine 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.

Visit our website at: http://www.harborfreight.com

REV 11k

When unpacking, make sure that the product is intact

and undamaged. If any parts are missing or broken,

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.

Email our technical support at: tech@harborfreight.com

please call 1-800-520-0882 as soon as possible.

Tools required for assembly and service may not be included.

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

ITEM 68122 68123

Read this material before using this product. Failure to do so can result in serious injury. SAVE THIS MANUAL.

Page 2

Table of Contents

Specications ............................................. 2

Safety ......................................................... 3

Set Up......................................................... 8

SAFETY OPERATION MAINTENANCESETUP

Operation .................................................... 9

Specications

Engine Type Vertical Single Cylinder 4 stroke OHV Cooling System Forced air cooled

Fuel

Engine Oil

Run Time @ 50% Load with full tank

Sound Level 104 dB Bore x Stroke 70 mm x 45 mm Displacement 173cc Compression Ratio 8.5:1 Rotation viewed from PTO

(power takeoff - the output shaft)

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

Warranties ................................................. 17

Parts Lists and Diagrams .......................... 19

Type 87+ octane unleaded gasoline Capacity 1.16 Quarts

Type SAE

Capacity 0.6 Quart

Shaft dia. 7/8″ x 3.16″

10W-30 above 32° F

5W30 at 32° F or below

40 minutes

Counterclockwise

Shaft

Spark Plug

Valve Clearance

Speed Idle 1,800 ± 50 RPM

Keyway 3/16″ (4.76 mm)

End Tapped 3/8″ - 24

NGK® BP-6ES/BPR6ES DENSO®: W16EPR-U/W16EP-U

Type

Gap 0.7 - 0.8 mm Intake 0.10 - 0.15 mm Exhaust 0.15 - 0.20 mm

CHAMPION®: RN9YC4 NHSP®: F7TC/F7RTC TORCH®: F7TC/F7RTC

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Page 3

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.

Safety Warnings

Symbol Denitions

Symbol Property or Statement

RPM

Revolutions Per Minute

Horsepower

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! Read all instructions.

Failure to follow all instructions listed below may result in re, 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.

Indicates a hazardous situation which, if not avoided,

could result in minor or moderate injury.

Addresses practices not related to personal injury.

Symbol Property or Statement

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 ammable objects away from engine.

SAFETYOPERATIONMAINTENANCE SETUP

SAVE THESE INSTRUCTIONS

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Page 4

Set up Precautions

1. Gasoline fuel and fumes are ammable, and potentially explosive. Use proper fuel storage and handling procedures. Do not store fuel

SAFETY OPERATION MAINTENANCESETUP

or other ammable materials nearby.

2. Have multiple ABC class re extinguishers nearby.

3. Operation of this equipment may create sparks

that can start res around dry vegetation. A spark

arrestor may be required. The operator should

contact local re agencies for laws or regulations relating to re prevention requirements.

Operating Precautions

1. CARBON MONOXIDE HAZARD

Using an engine indoors CAN KILL YOU IN MINUTES.

Engine 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.

4. Set up and use only on a at, level, well-ventilated surface.

5. Wear ANSI-approved safety goggles, heavy-duty work gloves, and dust mask/respirator during set up.

6. Use only lubricants and fuel recommended

in the Specications chart of this manual.

2. Keep children away from the equipment, especially while it is operating.

3. Keep all spectators at least six feet from the Engine during operation.

4. Fire Hazard! Do not ll 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 ame.

5. Do not touch engine during use. Let engine cool down after use.

6. Never store fuel or other ammable materials near the engine.

7. Only use a suitable means of transport and

lifting devices with sufcient weight bearing

capacity when transporting the Engine.

8. Secure the Engine on transport vehicles to prevent the tool from rolling, slipping, and tilting.

9. Industrial applications must follow OSHA requirements.

10. Do not leave the equipment unattended when it is running. Turn off the equipment (and remove safety keys, if available) before leaving the work area.

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Page 5

11. Engine can produce high noise levels. Prolonged exposure to noise levels above 85 dBA is hazardous to hearing. Always wear ear protection when operating or working around the gas engine while it is operating.

12. Wear ANSI-approved safety glasses, hearing protection, and NIOSH-approved dust mask/ respirator under a full face shield along with steel-toed work boots during use.

13. People with pacemakers should consult their

physician(s) before use. Electromagnetic elds

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.

14. 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.

15. Do not operate in explosive atmospheres,

such as in the presence of ammable

liquids, gases, or dust. Gasoline-powered engines may ignite the dust or fumes.

16. Stay alert, watch what you are doing and use common sense when operating this piece of equipment. Do not use this piece of

equipment while tired or under the inuence

of drugs, alcohol or medication.

17. Do not overreach. Keep proper footing and balance at all times. This enables better control of the equipment in unexpected situations.

18. Use this equipment with both hands only. Using equipment with only one hand can easily result in loss of control.

19. 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.

20. Parts, especially exhaust system components, get very hot during use. Stay clear of hot parts.

21. Do not cover the engine or equipment during operation.

22. Keep the equipment, engine, and surrounding area clean at all times.

23. 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.

24. Do not operate the equipment with known leaks in the engine’s fuel system.

25. This product contains or, when used, produces a chemical known to the State of California to cause cancer and birth defects or other reproductive harm. (California Health & Safety Code § 25249.5, et seq.)

26. When spills of fuel or oil occur, they must be

cleaned up immediately. Dispose of uids and

cleaning materials as per any local, state, or federal codes and regulations. Store oil rags in a bottom-ventilated, covered, metal container.

27. Keep hands and feet away from moving parts. Do not reach over or across equipment while operating.

28. 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.

29. 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.

30. Follow equipment manufacturer’s operation precautions.

SAFETYOPERATIONMAINTENANCE SETUP

Page 5For technical questions, please call 1-800-520-0882.Vertical Engine

Page 6

Service Precautions

1. Before service, maintenance, or cleaning:

a. Release the brake handle, stopping the engine.

b. Allow the engine to completely cool.

SAFETY OPERATION MAINTENANCESETUP

c. Then, remove the spark plug

cap from the spark plug.

2. Keep all safety guards in place and in proper working order. Safety guards include

mufer, air cleaner, mechanical guards,

and heat shields, among other guards.

3. Do not alter or adjust any part of the

equipment or its engine that is sealed by the

manufacturer or distributor. Only a qualied

service technician may adjust parts that may increase or decrease governed engine speed.

4. Wear ANSI-approved safety goggles, heavy-duty work gloves, and dust mask/respirator during service.

5. Maintain labels and nameplates on the equipment. These carry important information. If unreadable or missing, contact Harbor Freight Tools for a replacement.

6. Have the equipment serviced by a qualied 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.

THE ENGINE BRAKE IS FOR EMERGENCY SHUTOFF; DO NOT REPLACE THE BRAKE SPRING WITH A WEAKER SPRING.

7. Store equipment out of the reach of children.

8. Follow scheduled engine and equipment maintenance.

Refueling:

1. Do not smoke, or allow sparks, ames, or other sources of ignition around the equipment, especially when refuelling.

2. Do not rell the fuel tank while the engine is running or hot.

3. Do not ll fuel tank to the top. Leave a little room for the fuel to expand as needed.

4. Refuel in a well-ventilated area only.

5. 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.

SAVE THESE INSTRUCTIONS.

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Page 7

Engine Components

Dipstick

Fuel Cap

SAFETYOPERATIONMAINTENANCE SETUP

Priming

Bulb

Starter Handle

Mufer

Air

Filter

Brake

Arm

Throttle

XXXXXXXXXX

Serial

Number

Location

(Write on front

cover of manual.)

Page 7For technical questions, please call 1-800-520-0882.Vertical Engine

Page 8

Set Up

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.

SAFETY OPERATION MAINTENANCESETUP

TO PREVENT SERIOUS INJURY: Operate only with proper spark arrestor installed.

Operation of this equipment may create sparks that can start res around dry vegetation. A spark arrestor may be required. The operator should contact local re agencies for laws or regulations relating to re prevention requirements.

Model 68123: The emission control system for this engine is warranted for standards set by the U.S. Environmental Protection Agency. For warranty information, refer to the last pages of this manual.

Models 68122: The emission control system for this Generator’s Engine is warranted for standards set by the U.S. Environmental Protection Agency and by the California Air Resources Board (also known as CARB). For warranty information, refer to the last pages of this manual.

At high altitudes, the engine’s carburetor, governor (if so equipped), and any other parts that control the fuel-air

ratio will need to be adjusted by a qualied mechanic to allow efcient high-altitude use and to prevent damage to

the engine and any other devices used with this product.

1. IMPORTANT: If you have any doubts about your

ability to perform the following procedures, have a

qualied service technician perform the installation.

2. Install this engine on a lawn mower only. Do not use to power a vehicle.

3. Mounting hole locations:

5. Use hardened, stainless steel Bolts, Lock Washers, and Washers (not included) of appropriate length and diameter to secure the Engine to the mower.

Make sure the hardware will not contact moving parts during operation.

6. Insert the mower’s brake cable sheath through the hole in the Brake bracket. Secure the mower brake cable to the brake arm. Adjust the brake cable sheath to remove all slack and secure it in place using the adjusting nuts on the cable sheath, as shown in the illustration below.

THE ENGINE BRAKE IS FOR EMERGENCY SHUTOFF; DO NOT REPLACE THE BRAKE SPRING WITH A WEAKER SPRING.

If operating the engine brake is too difcult, a qualied technician must install a

different brake handle on the mower.

Note: The brake cable on some mowers may

need to be adjusted in a different manner. Install according to mower manufacturer’s instructions.

Brake

Arm

Brake Cable

Throttle

Control

Throttle

a. one 3/8 in. x 24 threaded; 1 in. deep b. two Ø0.34 in. / 8.7mm unthreaded

(use 5/16 in. / 8mm diameter hardware)

4. Set the Engine upright on the mower, and align at least three engine mounting holes with mower mounting holes.

NOTE: Depending on the mower, it may be necessary to drill mounting holes or make a mounting plate to align with the engine mounting holes. Only a

qualied technician should attempt these solutions.

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Cable

Bracket

and Bolt

Attach the end of the mower’s Throttle Cable to the Throttle Control. Use the Bracket and Bolt to secure its sheath in place as shown above.

8. Refer to the mower’s service manual for instructions on how to properly attach a belt drive pulley, chain drive gear, etc. onto the output shaft of the Engine.

Brake Cable

Bracket

REV 11f

Page 9

Operation

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.

Pre-Start Checks

Inspect engine and equipment looking for damaged, loose, and missing parts before set up

and starting. If any problems are found, do not use equipment until xed properly.

Checking and Filling Engine Oil

CAUTION! Your Warranty is VOID if the engine’s

crankcase is not properly lled with oil before

each use. Before each use, check the oil level. Do not run the engine with low or no engine oil. Running the engine with no or low engine oil WILL permanently damage the engine.

1. Make sure the engine is stopped and is level.

2. Clean the top of the Dipstick and the area around it. Remove the Dipstick by threading it counterclockwise, and wipe it off with a clean lint free rag.

Full level

Reinsert the Dipstick without threading it in and remove it to check the oil level. The oil level should be up to the full level, the top of the crosshatched area on the dipstick as shown above.

4. If the oil level is below the full level add the appropriate type of oil until the oil level is at the correct level. SAE 10W-30 oil is recommended for general use. (The SAE Viscosity Grade chart on page 13 in the Maintenance section shows other viscosities to use in different average temperatures.)

5. Thread the Dipstick back in clockwise.

CAUTION! Do not run the engine with too little oil. The engine will be permanently damaged.

Checking and Filling Fuel

WARNING! 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.

1. Clean the Fuel Cap and the area around it.

2. Unscrew and remove the Fuel Cap.

3. If needed, ll the Fuel Tank to about 1 inch

under the ll neck of the Fuel Tank with

87 octane or higher unleaded gasoline.

Note: Do not use gasoline containing more than 10% ethanol (E10). Do not use E85 ethanol.

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.

4. Then replace the Fuel Cap.

5. 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.

SAFETYOPERATIONMAINTENANCE SETUP

Page 9For technical questions, please call 1-800-520-0882.Vertical Engine

Page 10

Starting the Engine

Before Starting the Engine:

a. Follow the Set Up Instructions in the equipment

SAFETY OPERATION MAINTENANCESETUP

manual to prepare the equipment.

b. Inspect the equipment and engine. c. Fill the engine with the proper amount

and type of both fuel and oil.

d. Read the Equipment Operation section

in the equipment manual.

e. Move the mower to a location that is at, level, and

free from loose objects (such as rocks or sticks).

The mower may be difcult to start on grass.

1. Press the Priming Bulb 2-3 times to prime the engine.

2. Adjust the Mower’s Throttle control to full throttle.

Note: Location, operation, and design of the Throttle control will vary from manufacturer to manufacturer.

3. Hold the mower’s brake handle closed.

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Page 11

4. Grip the Starter Handle of the Engine loosely and pull it gently until resistance is felt. Allow Cable to retract fully and then pull it quickly. Repeat until the engine starts.

Note: Do not let the Starter Handle snap back against the engine. Hold it as it recoils so it doesn't hit the engine.

SAFETYOPERATIONMAINTENANCE SETUP

5. Allow the Engine to run for several seconds. Then, the Mower’s Throttle control can be adjusted as desired for operation.

IMPORTANT: Allow the engine to run at no load for a minute or two with no load after each start-up so that the engine can stabilize.

6. Break-in Period:

a. Breaking-in the engine will help to ensure proper equipment and engine operation.

b. The operational break-in period will last about 3 hours of use. During this period:

• Do not apply a heavy load to the equipment.

c. The maintenance break-in period will last about 20 hours of use. After this period:

• Change the engine oil.

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

Stopping the Engine

To stop the engine, release the brake handle.

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Page 12

Maintenance

WARNING

TO PREVENT SERIOUS INJURY FROM ACCIDENTAL STARTING:

SAFETY OPERATION MAINTENANCESETUP

Release the brake handle, 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.

Many maintenance procedures, including any not detailed in this manual, will need to be

performed by a qualied technician for safety. If you have any doubts about your ability to safely service the equipment or engine, have a qualied 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.

Monthly or

every 20

hr. of use

Procedure

Brush off outside of engine

Check engine oil level

Check air cleaner

Check deposit cup

Change engine oil

Clean/replace air cleaner

Check and clean spark plug

1. Check/adjust idle speed

2. Check/adjust valve clearance

3. Clean fuel tank, strainer and carburetor

4. Clean carbon build-up from combustion chamber

Replace fuel line if necessary

Before

Each Use

*Service more frequently when used in dusty areas.

**These items should be serviced by a qualied technician.

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

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Page 13

Checking and Filling Fuel

WARNING! 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.

1. Clean the Fuel Cap and the area around it.

2. Unscrew and remove the Fuel Cap.

3. If needed, ll the Fuel Tank to about 1 inch

under the ll neck of the Fuel Tank with

87 octane or higher unleaded gasoline.

Note: Do not use gasoline containing more than 10% ethanol (E10). Do not use E85 ethanol.

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, effecting engine performance and/or causing damage.

4. Then replace the Fuel Cap.

5. 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

CAUTION! Oil is very hot during operation and can

cause burns. Wait for engine to cool before changing oil.

1. Make sure the engine is stopped.

2. Clean the top of the Dipstick and the area around it. Remove the Dipstick by threading it counterclockwise.

3. Tilt the engine over a suitable oil container far enough to allow all the oil to drain out. Recycle used oil.

4. Wipe off the dipstick with a clean lint free rag.

5. Add the appropriate type of oil until the oil level is at the full level. SAE 10W-30 oil is recommended for general use. The SAE Viscosity Grade chart shows other viscosities to use in different average temperatures.

Full level

Reinsert the Dipstick without threading it in and remove it to check the oil level. The oil level should be up to the full level, the top of the crosshatched area on the dipstick as shown above.

7. Thread the dipstick back in clockwise.

CAUTION! Do not run the engine with too little oil. The engine will be permanently damaged.

Air Filter Element Maintenance

1. Remove the air lter cover and the air

lter elements and check for dirt. Clean

or replace as described below.

2. Cleaning:

• For “paper” lter 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 lter. If this does not get the lter clean, replace it.

• For foam lter 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 lter in lightweight oil briey, then squeeze out the excess oil.

3. Install the new lter or the cleaned lter. Secure the Air Cleaner Cover before use.

SAFETYOPERATIONMAINTENANCE SETUP

SAE Viscosity Grade

10W-30

5W-30

-20 0 20 40 60 80 100°F

Average outdoor temperature

Spark Plug Maintenance

Spark

Plug

Cap

Disconnect spark plug cap from end of plug. Clean out debris from around spark plug.

2. Using a spark plug wrench, remove the spark plug.

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Page 14

3. 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.

SAFETY OPERATION MAINTENANCESETUP

Recommended Spark Plugs

Brand Plug

NGK

® /

NHSP DENSO CHAMPION

TORCH

BP-6ES/BPR6ES

W16EPR-U/W16EP-U

NOTICE: Using an incorrect spark plug may damage the engine.

4. When installing a new spark plug, adjust

the plug’s gap to the specication on the Specications chart. Do not pry against the

electrode, the spark plug can be damaged.

Storage

F7TC/F7RTC

RN9YC4

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

6. Apply dielectric spark plug boot protector (not included) to the end of the spark plug and reattach the wire securely.

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

1. CLEANING:

Wait for engine to cool, then clean engine with dry cloth. NOTICE: Do not clean using water. Water will gradually enter engine and cause rust damage. Apply a thin coat of rust preventive oil to all metal parts.

2. FUEL:

WARNING! TO PREVENT SERIOUS

INJURY FROM FIRE:

Drain 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 draining fuel.

Do not smoke.

a. Place a funnel leading to a proper gasoline

container below the carburetor.

c. After all fuel has drained, reinstall the

drain bolt. Tighten securely.

3. LUBRICATION:

a. Change engine oil.

b. Clean out area around spark plug. Remove

spark plug and pour one tablespoon of engine oil into cylinder through spark plug hole.

c. Replace spark plug, but leave spark

plug cap disconnected.

d. 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).

4. 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.

5. 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 properly.

Drain Plug

Remove the drain bolt from the bottom of the carburetor bowl and allow the fuel to drain.

Page 14 For technical questions, please call 1-800-520-0882. Vertical Engine

Page 15

Troubleshooting

Problem Possible Causes Probable Solutions

Engine will not start MOWER ENGINE SPECIFIC:

1. Brake Handle not held or brake cable not connected properly.

2. Mower on top of grass.

FUEL RELATED:

1. No fuel in tank.

2. Low quality or deteriorated, old gasoline.

3. Carburetor not primed.

4. Dirty fuel passageways.

5. Carburetor needle stuck. Fuel can be smelled in the air.

6. Too much fuel in chamber. This can be caused by the carburetor needle sticking.

IGNITION (SPARK) RELATED:

1. Spark plug cap not connected securely.

2. Spark plug electrode wet or dirty.

3. Incorrect spark plug gap.

4. Spark plug cap broken.

5. Incorrect spark timing or faulty ignition system.

COMPRESSION RELATED:

1. Cylinder not lubricated. Problem after long storage periods.

2. Loose or broken spark plug. (Hissing noise will occur when trying to start.)

3. Loose cylinder head or damaged head gasket. (Hissing noise will occur when trying to start.)

4. Engine valves or tappets mis-adjusted or stuck.

Engine misres 1. Spark plug cap loose.

2. Incorrect spark plug gap or damaged spark plug.

3. Defective spark plug cap.

4. Old or low quality gasoline.

5. Incorrect compression.

MOWER ENGINE SPECIFIC:

1. Make sure brake handle is held down and brake cable is properly adjusted.

2. Start mower atop clear area free of loose objects and grass.

FUEL RELATED:

1. Fill fuel tank.

2. Use fresh 87+ octane unleaded gasoline.

3. Press priming bulb before starting cold engine.

4. Clean out passageways using fuel additive. Heavy deposits may require further cleaning.

5. Gently tap side of carburetor oat chamber with screwdriver handle.

6. Turn Throttle to full position. Remove spark plug and pull the start handle several times to air out the chamber. Reinstall spark plug and attempt to restart.

IGNITION (SPARK) RELATED:

1. Connect spark plug cap properly.

2. Clean spark plug.

3. Correct spark plug gap.

4. Replace spark plug cap.

5. Have qualied technician diagnose/ repair ignition system.

COMPRESSION RELATED:

1. Pour tablespoon of oil into spark plug hole. Crank engine a few times and try to start again.

2. Tighten spark plug. If that does not work, replace spark plug. If problem persists, may have head gasket problem, see #3.

3. Tighten head. If that does not remedy problem, replace head gasket.

4. Have qualied technician diagnose/ repair ignition system.

1. Check wire connections.

2. Re-gap or replace spark plug.

3. Replace spark plug cap.

4. Use only fresh 87+ octane unleaded gasoline.

5. Diagnose and repair compression. (Use Engine will not start:

COMPRESSION RELATED section.)

SAFETYOPERATIONMAINTENANCE SETUP

Follow all safety precautions whenever diagnosing or servicing the equipment or engine.

Page 15For technical questions, please call 1-800-520-0882.Vertical Engine

Page 16

Engine stops suddenly

SAFETY OPERATION MAINTENANCESETUP

Engine stops when under heavy load

Engine knocks 1. Old or low quality gasoline.

Engine backres 1. Impure or low quality gasoline.

Problem Possible Causes Probable Solutions

1. Low oil shutdown.

2. Fuel tank empty or full of impure or low quality gasoline.

3. Defective fuel tank cap creating

vacuum, preventing proper fuel ow.

4. Faulty magneto.

5. Disconnected or improperly connected spark plug cap.

1. Dirty air lter

2. Engine running cold.

2. Engine overloaded.

3. Incorrect spark timing, deposit buildup, worn engine, or other mechanical problems.

2. Engine too cold.

3. Intake valve stuck or overheated engine.

4. Incorrect timing.

1. Fill engine oil to proper level. Check engine oil before EVERY use.

2. Fill fuel tank with fresh 87+ octane unleaded gasoline.

3. Test/replace fuel tank cap.

4. Have qualied technician service magneto.

5. Secure spark plug cap.

1. Clean or replace element.

2. Allow engine to warm up prior to operating equipment.

1. Fill fuel tank with fresh 87+ octane unleaded gasoline.

2. Do not exceed equipment’s load rating.

3. Have qualied technician diagnose and service engine.

1. Fill fuel tank with fresh 87+ octane unleaded gasoline.

2. Use cold weather fuel and oil

additives to prevent backring.

3. Have qualied technician diagnose and service engine.

4. Check engine timing.

Follow all safety precautions whenever diagnosing or servicing the equipment or engine.

Page 16 For technical questions, please call 1-800-520-0882. Vertical Engine

Page 17

Warranties

Limited 90 Day Warranty

Harbor Freight Tools Co. makes every effort to assure that its products meet high quality and durability standards, and warrants to the original purchaser that this product is free from defects in materials and workmanship for the period of 90 days from the date of purchase. This warranty does not apply to damage due directly or indirectly, to misuse, abuse, negligence or accidents, repairs or alterations outside our facilities, criminal activity, improper installation, normal wear and tear, or to lack of maintenance. We shall in no event be liable for death, injuries to persons or property, or for incidental, contingent, special or consequential damages arising from the use of our product. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation of exclusion may not apply to you. THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS.

Emission Control System Warranty

United States Emission Control Defects Warranty Statement (for Model 68123)

The United States Environmental Protection Agency (herein EPA) and Harbor Freight Tools (herein HFT) are pleased to explain the emission control system warranty on your 1997 and later Small OffRoad Engine (herein engine). Within the United States, new off-road,

spark-ignition engines certied for model year 1997 and later, must be

designed, built and equipped to meet the stringent anti-smog standards set forth by the EPA. HFT must warrant the emission control system on your engine for the periods of time described below, provided there has been no abuse, neglect or improper maintenance of your engine.

Your emission control system may include parts such as the carburetor or fuel-injection system, and the ignition system. Also included may be hoses, belts, connectors and other emission-related assemblies.

Where a warrantable condition exists, HFT will repair your engine at no cost to you including diagnosis, parts and labor.

To take advantage of this warranty, the product or part must be returned to us with transportation charges prepaid. Proof of purchase date and an explanation of the complaint must accompany the merchandise. If our

inspection veries the defect, we will either repair or

replace the product at our election or we may elect to refund the purchase price if we cannot readily and quickly provide you with a replacement. We will return repaired products at our expense, but if we determine there is no defect, or that the defect resulted from causes not within the scope of our warranty, then you must bear the cost of returning the product.

This warranty gives you specic legal rights and you may

also have other rights which vary from state to state.

California and United States Emission Control Defects Warranty Statement (for Model 68122)

The California Air Resources Board (herein CARB), the United States Environmental Protection Agency (herein EPA), and Harbor Freight Tools (herein HFT) are pleased to explain the emission control system warranty on your 1995 and later Small Off-Road Engine (herein engine). In California, the engine must be designed, built and equipped to meet the State’s stringent anti-smog standards. Elsewhere within

the United States, new off-road, spark-ignition engines certied for

model year 1997 and later, must meet similar standards set forth by the EPA. HFT must warrant the emission control system on your engine for the periods of time described below, provided there has been no abuse, neglect or improper maintenance of your engine.

Where a warrantable condition exists, HFT will repair your engine at no cost to you including diagnosis, parts and labor.

SAFETYOPERATIONMAINTENANCE SETUP

Page 17For technical questions, please call 1-800-520-0882.Vertical Engine

Page 18

Manufacturer’s Warranty Coverage

The 1995 and later engines are warranted for two (2) years. If any emission-related part on your engine is defective, the part will be repaired or replaced by HFT.

Harbor Freight Tools Emission Control Defects Warranty Coverage

SAFETY OPERATION MAINTENANCESETUP

Engines are warranted for a period of two (2) years relative to emission control parts defects, subject to the provisions set forth below. If any emission related part on your engine is defective, the part will be repaired or replaced by HFT.

Owner’s Warranty Responsibilities

• As the engine owner, you are responsible for the performance of the required maintenance listed in your Owner’s Manual. HFT recommends that you retain all receipts covering maintenance on your engine, but HFT cannot deny warranty solely for the lack of receipts or for your failure to ensure the performance of all scheduled maintenance.

• As the engine owner, you should, however, be aware that HFT may deny you warranty coverage if your engine or a part has failed due to abuse, neglect, improper

maintenance, or unapproved modications.

• You are responsible for shipping your engine to a HFT warranty

station as soon as a problem exists. Contact the HFT Customer Service department at the number below to make shipping arrangements. The warranty repairs should be completed in a reasonable amount of time, not to exceed 30 days.

If you have any questions regarding your warranty rights

and responsibilities, you should contact the Harbor Freight Tools Customer Service Department at 1-800-520-0882.

Harbor Freight Tools Emission Control Defects Warranty Provisions

1. Length of Coverage

HFT warrants to a rst retail purchaser and each

subsequent purchaser that the engine is free from defects in materials and workmanship that cause the failure of warranted parts for a period of two (2) years

after the date of delivery to the rst retail purchaser.

2. No Charge Repair or Replacement

Repair or replacement of any warranted part will be performed at no charge to the owner if the work is performed through a warranty station authorized by HFT. For emissions warranty service, contact the HFT Customer Service Department at 1-800-520-0882.

3. Consequential Damages Coverage

Coverage under this warranty shall also extend to the failure of any engine components caused by the failure of any warranted part while it is still covered under this warranty.

4. Coverage Exclusions

Warranty claims shall be led in accordance with the provisions

of the HFT warranty policy explained in the box at the top of the previous page. HFT shall not be liable for any loss of use of the engine, for any alternative usage, for any damage to goods, loss of time, or inconvenience. Warranty coverage shall also be excluded for any part which fails, malfunctions, or is damaged due to failure to follow the maintenance and operating instructions set forth in the Owner’s Manual including, but not limited to:

a) Use of parts which are not authorized by HFT b) Improper installation, adjustment or repair of

the engine or of any warranted part unless performed by an authorized warranty center

c) Failure to follow recommendations on fuel

use contained in the Owner’s Manual d) Improper or inadequate maintenance of any warranted parts e) Repairs performed outside of the authorized

warranty service dealers f) Alterations by changing, adding to or

removing parts from the engine.

5. Service and Maintenance

Component parts which are not scheduled for replacement as required maintenance or are scheduled only for regular inspection to the effect of “repair or replace as necessary” are warranted for the warranty period. Any warranted part which is scheduled for replacement as required maintenance

is warranted for the period of time up to the rst scheduled

replacement point for that part. Any replacement part, provided it is equivalent in durability and performance, may be used in performance of maintenance or repairs. The

owner is responsible for commissioning a qualied technician/

mechanic to perform all required maintenance, as outlined in the Inspection, Cleaning, and Maintenance section in this manual.

6. Warranted Parts

1) Fuel Metering System

i) Carburetor and its internal parts.

ii) Fuel pump (if so equipped).

iii) Cold start enrichment system.

2) Air Induction System

i) Intake pipe/manifold.

ii) Air cleaner.

3) Ignition System

i) Spark plug.

ii) Magneto ignition system.

4) Catalyst System (if so equipped)

i) Exhaust pipe stud.

ii) Mufer.

iii) Catalytic converter (if so equipped).

5) Miscellaneous Items Used in Above Systems

i) Vacuum, temperature and time

sensitive valves and switches.

ii) Hoses, belts, connectors, and assemblies.

Page 18 For technical questions, please call 1-800-520-0882. Vertical Engine

Page 19

Parts Lists and Diagrams

Mounting Hole Diagram

Note: Not to scale.

Ø8 in. / 203mm

1.1 in. / 28mm

0.98 in. / 25mm

6*Ø0.35 in. / 9mm

Ø0.24 in. / 6mm

A-A

2:1

SAFETYOPERATIONMAINTENANCE SETUP

3/8 in. x 24

Ø0.34 in.

/ 8.7mm

3.27 in. / 83mm

Ø0.34 in. / 8.7mm

Ø1 in. / 25.4mm

Ø0.24 in.

/ 6mm

REV 11f

3.85 in. / 97.7mm3.94 in. / 100mm

Page 19For technical questions, please call 1-800-520-0882.Vertical Engine

Page 20

68122 Parts List

SAFETY OPERATION MAINTENANCESETUP

Part Description Qty.

1 Cover, Cylinder Head 1 2 Gasket, Cylinder Head Cover 1 3 Head Asm., Cylinder 1 4 Gasket, Cylinder Head 1 5 Bolt 4 6 Plug, Spark 1 7 Bolt, Cylinder Head 4 8 Bracket, Mufer Shield 1

9 Bolt 1 10 Stud 2 11 Pin 2 12 Crankcase Asm. 1 13 Shield, Crankcase Side 1 14 Dipstick Asm., Oil 1 15 Bolt 2 16 Bolt 1 17 Bracket, Fuel Tank Right 1 18 Seal, Oil 1 19 Bolt 1 20 Bolt 2 21 Plate, Breath Groove Cover 1 22 Gasket, Breath Groove 1 23 Piece, Breath 1 24 Strainer, Breath Groove 1 25 Shield, Crankcase Rear 1 26 Bearing 1 27 Bracket, Fuel Tank Left 1 28 Bolt 1 29 Arm, Governor 1 30 Washer 1 31 Seal, Oil 1 32 Pin 1 33 Bracket, Fuel Tank Lower 1 34 Bolt 1 35 Gasket, Crankcase 1 36 Pin 2 37 Washer 1 38 Block, Returning Oil 1 39 Bolt 1 40 Plate, Governor Spindle Compression 1 41 Seal, Oil 1 42 Bolt 6 43 Gear Asm., Governor 1 44 Cover, Crankcase 1 45 Ring, The First 1 46 Ring, The Second 1 47 Ring Set, Oil 1 48 Piston 1 49 Clip, Piston Pin 2 50 Pin, Piston 1 51 Rod, Connecting 1 52 Crankshaft Asm. 1 53 Nut, Valve Lock 2 54 Nut_ Valve Adjusting 2 55 Seat, Valve Spring 2 56 Rocker, Valve 2 57 Spring, Valve 2 58 Guide, Seal 1 59 Bolt, Valve Adjusting 2 60 Valve, Intake 1

Part Description Qty.

61 Plate Asm., Lifter Stopper 1 62 Lifter, Valve 2 63 Tappet, Valve 2 64 Camshaft Asm. 1 65 Valve, Exhaust 1 66 Starter Asm., Recoil 1 67 Housing, Engine 1 68 Shroud 1 69 Nut 3 70 Stud 2 71 Stud 1 72 Gasket, Insulator Plate 1 73 Plate, Carburetor Insulator 1 74 Gasket, Carburetor 2 75 Gasket, Carburetor Insulator 1 76 Carburetor Asm. 1 77 Gasket, Air Cleaner 1 78 Priming Bulb 1 79 Gasket, Air Cleaner 1 80 Tube, Breather 1 81 Nut 2 82 Case, Air Cleaner 1 83 Element Asm., Air Cleaner 1 84 Cover, Air Cleaner Case 1 85 Cover, Mufer Outer 1 86 Gasket, Exhaust Outlet 1 87 Bolt 3 88 Bolt 2 89 Mufer Asm. 1 90 Bolt 2 91 Tank Asm., Fuel 1 92 Strainer, fuel 1 93 Clamp 1 94 Tube, Fuel 1 95 Clamp 1 96 Collar 4 97 Hose, Vapor Rubber 1 98 Valve, One Way 1

99 Jacket, Rubber 1 100 Hose, Vapor Rubber 1 101 Clamp 2 102 Hose, Air Cleaner Rubber 2 103 Collector, Vapor 1 104 Bracket Asm., Vapor Collector 1 105 Nut, Flywheel 1 106 Flywheel Asm. 1 107 Bolt 1 108 Coil, Ignition 1 109 Brake Asm. 1

110 Bolt 1 111 Bolt 1 112 Rod, Governor 1 113 Spring, Throttle Valve Returning 1 114 Control Asm., Throttle 1 115 Bolt 1 116 Support Asm., Governor 1 117 Bolt, Governor Support 1 118 Nut 1 119 Spring, Governor 1

120 Clip 1

Page 20 For technical questions, please call 1-800-520-0882. Vertical Engine

Page 21

68122 Assembly Diagram

108

106

105

107

110

39 40

111

109

114

112

120

115

113

100

101

116

118

117

119

104

102 101

103

SAFETYOPERATIONMAINTENANCE SETUP

Page 21For technical questions, please call 1-800-520-0882.Vertical Engine

Page 22

68123 Parts List

SAFETY OPERATION MAINTENANCESETUP

Part Description Qty.

1 Cover, Cylinder Head 1 2 Gasket, Cylinder Head Cover 1 3 Head Asm., Cylinder 1 4 Gasket, Cylinder Head 1 5 Bolt 4 6 Plug, Spark 1 7 Bolt, Cylinder Head 4 8 Bracket, Mufer Shield 1

Plate, Governor Spindle

Compression 39 Seal, Oil 1 40 Bolt 6 41 Gear Asm., Governor 1 42 Cover, Crankcase 1 43 Ring, The First 1 44 Ring, The Second 1 45 Ring Set, Oil 1 46 Piston 1 47 Clip, Piston Pin 2 48 Pin, Piston 1 49 Rod, Connecting 1 50 Crankshaft Asm. 1 51 Nut, Valve Lock 2 52 Nut, Valve Adjusting 2 53 Seat, Valve Spring 2 54 Rocker, Valve 2

Part Description Qty.

55 Spring, Valve 2 56 Guide, Seal 1 57 Bolt, Valve Adjusting 2 58 Valve, Intake 1 59 Plate Asm., Lifter Stopper 1 60 Lifter, Valve 2 61 Tappet, Valve 2 62 Camshaft Asm. 1 63 Valve, Exhaust 1 64 Starter Asm., Recoil 1 65 Housing, Engine 1 66 Shroud 1 67 Nut 3 68 Stud 2 69 Stud 1 70 Gasket, Insulator Plate 1 71 Plate, Carburetor Insulator 1 72 Gasket, Carburetor 2 73 Gasket, Carburetor Insulator 1 74 Carburetor Asm. 1 75 Gasket, Air Cleaner 1 76 Priming Bulb 1 77 Gasket, Air Cleaner 1 78 Tube, Breather 1 79 Nut 2 80 Case, Air Cleaner 1 81 Element Asm., Air Cleaner 1 82 Cover, Air Cleaner Case 1 83 Cover, Mufer Outer 1 84 Mufer Asm. 1 85 Gasket, Exhaust Outlet 1 86 Bolt 3 87 Bolt 2 88 Strainer,Fuel 1 89 Clamp 1 90 Tube, Fuel 1 91 Clamp 1

92 Bolt 2 93 Tank Asm., Fuel 1 94 Nut, Flywheel 1 95 Flywheel Asm. 1 96 Bolt 1 97 Coil, Ignition 1 98 Brake Asm. 1

99 Bolt 1 100 Bolt 1 101 Rod, Governor 1 102 Spring, Throttle Valve Returning 1 103 Control Asm., Throttle 1 104 Bolt 1 105 Support Asm., Governor 1 106 Bolt, Governor Support 1 107 Nut 1 108 Spring, Governor 1 109 Clip 1

Page 22 For technical questions, please call 1-800-520-0882. Vertical Engine

Page 23

68123 Assembly Diagram

SAFETYOPERATIONMAINTENANCE SETUP

37 38

103

100

109

101

104

102

106

105

107

108

Page 23For technical questions, please call 1-800-520-0882.Vertical Engine

Page 24

3491 Mission Oaks Blvd. • PO Box 6009 • Camarillo, CA 93011 • (800) 520-0882

www.harborfreight.com

Harbor Freight Tools 68122, 68123 User Manual 2

Specifications and Main Features

Frequently Asked Questions

User Manual