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.
Only use OUTSIDE
and far away from
windows, doors,
and vents.
Email our technical support at: [email protected]
ITEM 68122 68123
REV 11k
When unpacking, make sure that the product is intact
and undamaged. If any parts are missing or broken,
please call 1-800-520-0882 as soon as possible.
©
®
Copyright 2010 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.
Read this material before using this product.
Failure to do so can result in serious injury.
SAVE THIS MANUAL.
Download from Www.Somanuals.com. All Manuals Search And Download.
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.
Addresses practices not related to personal injury.
Safety Warnings
Symbol Definitions
Symbol
Property or Statement
Symbol
Property or Statement
WARNING marking concerning Risk of
Hearing Loss. Wear hearing protection.
Revolutions Per Minute
RPM
Horsepower
HP
WARNING marking concerning
Risk of Respiratory Injury.
Operate engine OUTSIDE and far away
from windows, doors, and vents.
WARNING marking concerning Risk
of Eye Injury. Wear ANSI-approved
safety goggles with side shields.
WARNING marking concerning
Risk of Fire while handling fuel.
Do not smoke while handling fuel.
Read the manual before set-up and/or use.
WARNING marking concerning
Risk of Fire.
Do not refuel while operating.
Keep flammable objects away from engine.
WARNING! Read all instructions.
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
Vertical Engine
For technical questions, please call 1-800-520-0882.
Page 3
Download from Www.Somanuals.com. All Manuals Search And Download.
Set up Precautions
1. 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.
4. Set up and use only on a flat, level,
well-ventilated surface.
5. Wear ANSI-approved safety goggles, heavy-duty
work gloves, and dust mask/respirator during set up.
2. Have multiple ABC class fire extinguishers nearby.
6. Use only lubricants and fuel recommended
3. 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.
in the Specifications chart of this manual.
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.
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 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.
5. Do not touch engine during use.
Let engine cool down after use.
6. Never store fuel or other flammable
materials near the engine.
NEVER use inside a home or garage, EVEN IF doors
and windows are open.
7. Only use a suitable means of transport and
lifting devices with sufficient 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.
Only use OUTSIDE and far away from windows,
doors, and vents.
Page 4
For technical questions, please call 1-800-520-0882.
Vertical Engine
Download from Www.Somanuals.com. All Manuals Search And Download.
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.
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.
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.
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.
13. 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.
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.)
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.
26. When spills of fuel or oil occur, they must be
cleaned up immediately. Dispose of fluids and
cleaning materials as per any local, state, or
federal codes and regulations. Store oil rags in
a bottom-ventilated, covered, metal container.
15. 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.
27. Keep hands and feet away from moving
parts. Do not reach over or across
equipment while operating.
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 influence
of drugs, alcohol or medication.
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.
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.
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.
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.
30. Follow equipment manufacturer’s
operation precautions.
Vertical Engine
For technical questions, please call 1-800-520-0882.
Page 5
Download from Www.Somanuals.com. All Manuals Search And Download.
Service Precautions
1. Before service, maintenance, or cleaning:
a. Release the brake handle, stopping the engine.
b. Allow the engine to completely cool.
6. 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.
THE ENGINE BRAKE IS FOR EMERGENCY
SHUTOFF; DO NOT REPLACE THE BRAKE
SPRING WITH A WEAKER SPRING.
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
muffler, air cleaner, mechanical guards,
and heat shields, among other guards.
7. Store equipment out of the reach of children.
3. 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.
8. Follow scheduled engine and
equipment maintenance.
Refueling:
4. Wear ANSI-approved safety goggles, heavy-duty
work gloves, and dust mask/respirator during service.
1. Do not smoke, or allow sparks, flames,
or other sources of ignition around the
equipment, especially when refuelling.
5. Maintain labels and nameplates on the
equipment. These carry important information.
If unreadable or missing, contact Harbor
Freight Tools for a replacement.
2. Do not refill the fuel tank while the
engine is running or hot.
3. Do not fill 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.
Page 6
For technical questions, please call 1-800-520-0882.
Vertical Engine
Download from Www.Somanuals.com. All Manuals Search And Download.
Engine Components
Fuel Cap
Priming
Bulb
Starter
Handle
Dipstick
Muffler
Air
Filter
Brake
Arm
Throttle
Serial
Number
XXXXXXXXXX
Location
(Write on front
cover of manual.)
Vertical Engine
For technical questions, please call 1-800-520-0882.
Page 7
Download from Www.Somanuals.com. All Manuals Search And Download.
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.
TO PREVENT SERIOUS INJURY:
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.
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.
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.
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.
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.
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 qualified mechanic to
allow efficient high-altitude use and to prevent damage to
the engine and any other devices used with this product.
THE ENGINE BRAKE IS FOR EMERGENCY
SHUTOFF; DO NOT REPLACE THE BRAKE
SPRING WITH A WEAKER SPRING.
If operating the engine brake is too difficult,
a qualified technician must install a
1. IMPORTANT: If you have any doubts about your
ability to perform the following procedures, have a
qualified service technician perform the installation.
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.
2. Install this engine on a lawn mower only.
Do not use to power a vehicle.
Brake
Arm
3. Mounting hole locations:
a
Brake
Cable
Brake
Cable
Bracket
Throttle
Control
Throttle
Cable
b
Bracket
and
b
Bolt
a. one 3/8 in. x 24 threaded; 1 in. deep
7. 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.
b. two Ø0.34 in. / 8.7mm unthreaded
(use 5/16 in. / 8mm diameter hardware)
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.
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
qualified technician should attempt these solutions.
REV 11f
Page 8
For technical questions, please call 1-800-520-0882.
Vertical Engine
Download from Www.Somanuals.com. All Manuals Search And Download.
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 fixed properly.
Checking and Filling Engine Oil
Checking and Filling Fuel
CAUTION! Your Warranty is VOID if the engine’s
crankcase is not properly filled 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.
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. Make sure the engine is stopped and is level.
1. Clean the Fuel Cap and the area around it.
2. Unscrew and remove the Fuel Cap.
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.
3. 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.
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.
Full level
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.
3. 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.
Vertical Engine
For technical questions, please call 1-800-520-0882.
Page 9
Download from Www.Somanuals.com. All Manuals Search And Download.
Starting the Engine
Before Starting the Engine:
a. Follow the Set Up Instructions in the equipment
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 flat, level, and
free from loose objects (such as rocks or sticks).
The mower may be difficult to start on grass.
1. Press the Priming Bulb 2-3 times to prime the engine.
1
2
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
3. Hold the mower’s brake handle closed.
Page 10
For technical questions, please call 1-800-520-0882.
Vertical Engine
Download from Www.Somanuals.com. All Manuals Search And Download.
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.
4
5
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.
Vertical Engine
For technical questions, please call 1-800-520-0882.
Page 11
Download from Www.Somanuals.com. All Manuals Search And Download.
Maintenance
WARNING
TO PREVENT SERIOUS INJURY FROM ACCIDENTAL STARTING:
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 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.
Monthly or
every 20
hr. of use
Yearly or
every 300
hr. of use
Before
Each Use
Every 3 mo. or Every 6 mo. or
50 hr. of use 100 hr. of use
Every
2 Years
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
*Service more frequently when used in dusty areas.
**These items should be serviced by a qualified technician.
Page 12
For technical questions, please call 1-800-520-0882.
Vertical Engine
Download from Www.Somanuals.com. All Manuals Search And Download.
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.
Full level
3. 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.
6. 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
Note: Do not use gasoline containing more than
10% ethanol (E10). Do not use E85 ethanol.
crosshatched area on the dipstick as shown above.
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.
7. Thread the dipstick back in clockwise.
CAUTION! Do not run the engine with too little oil.
The engine will be permanently damaged.
4. Then replace the Fuel Cap.
Air Filter Element Maintenance
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.
1. Remove the air filter cover and the air
filter elements and check for dirt. Clean
or replace as described below.
2. Cleaning:
Engine Oil Change
• For “paper” filter elements:
CAUTION! Oil is very hot during operation and can
cause burns. Wait for engine to cool before changing oil.
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.
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.
If this does not get the filter clean, replace it.
3. Tilt the engine over a suitable oil container far enough
to allow all the oil to drain out. Recycle used oil.
• 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.
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.
3. Install the new filter or the cleaned filter.
Secure the Air Cleaner Cover before use.
SAE Viscosity Grade
Spark Plug Maintenance
30
10W-30
Spark
Plug
Cap
5W-30
-20
0
20
40
60
80
100°F
Average outdoor temperature
1. 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.
Vertical Engine
For technical questions, please call 1-800-520-0882.
Page 13
Download from Www.Somanuals.com. All Manuals Search And Download.
3. Inspect the spark plug:
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.
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.
Non-gasket-style: Finger-tighten until the plug
contacts the head, then about 1/16 turn more.
Recommended Spark Plugs
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.
Brand
Plug
BP-6ES/BPR6ES
F7TC/F7RTC
®
NGK
® /
®
NHSP TORCH
®
DENSO
W16EPR-U/W16EP-U
RN9YC4
®
CHAMPION
6. Apply dielectric spark plug boot protector
(not included) to the end of the spark
plug and reattach the wire securely.
NOTICE: Using an incorrect spark
plug may damage the engine.
4. 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.
Storage
When the equipment is to remain idle for longer than
20 days, prepare the engine for storage as follows:
c. After all fuel has drained, reinstall the
drain bolt. Tighten securely.
1. CLEANING:
3. LUBRICATION:
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.
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.
2. FUEL:
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).
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.
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.
Do not smoke.
a. Place a funnel leading to a proper gasoline
container below the carburetor.
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
b. 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
Download from Www.Somanuals.com. All Manuals Search And Download.
Troubleshooting
Problem
Possible Causes
Probable Solutions
Engine will not start MOWER ENGINE SPECIFIC:
MOWER ENGINE SPECIFIC:
1. Brake Handle not held or brake
cable not connected properly.
1. Make sure brake handle is held down
and brake cable is properly adjusted.
2. Mower on top of grass.
2. Start mower atop clear area free
of loose objects and grass.
FUEL RELATED:
FUEL RELATED:
1. No fuel in tank.
1. Fill fuel tank.
2. Low quality or deteriorated, old gasoline.
3. Carburetor not primed.
2. Use fresh 87+ octane unleaded gasoline.
3. Press priming bulb before
starting cold engine.
4. Dirty fuel passageways.
4. Clean out passageways using
fuel additive. Heavy deposits
may require further cleaning.
5. Carburetor needle stuck.
Fuel can be smelled in the air.
5. Gently tap side of carburetor float
chamber with screwdriver handle.
6. Too much fuel in chamber.
This can be caused by
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.
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.
IGNITION (SPARK) RELATED:
1. Connect spark plug cap properly.
2. Clean spark plug.
3. Correct spark plug gap.
4. Replace spark plug cap.
4. Spark plug cap broken.
5. Incorrect spark timing or
faulty ignition system.
5. Have qualified technician diagnose/
repair ignition system.
COMPRESSION RELATED:
COMPRESSION RELATED:
1. Cylinder not lubricated. Problem after long 1. Pour tablespoon of oil into spark
storage periods.
plug hole. Crank engine a few
times and try to start again.
2. Loose or broken spark plug. (Hissing noise 2. Tighten spark plug. If that does not work,
will occur when trying to start.)
replace spark plug. If problem persists,
may have head gasket problem, see #3.
3. Loose cylinder head or damaged
head gasket. (Hissing noise will
occur when trying to start.)
3. Tighten head. If that does not remedy
problem, replace head gasket.
4. Engine valves or tappets
mis-adjusted or stuck.
4. Have qualified technician diagnose/
repair ignition system.
Engine misfires
1. Spark plug cap loose.
1. Check wire connections.
2. Incorrect spark plug gap or
damaged spark plug.
2. Re-gap or replace spark plug.
3. Defective spark plug cap.
4. Old or low quality gasoline.
3. Replace spark plug cap.
4. Use only fresh 87+ octane
unleaded gasoline.
5. Incorrect compression.
5. Diagnose and repair compression.
(Use Engine will not start:
COMPRESSION RELATED section.)
Follow all safety precautions whenever diagnosing or servicing the equipment or engine.
Vertical Engine
For technical questions, please call 1-800-520-0882.
Page 15
Download from Www.Somanuals.com. All Manuals Search And Download.
Problem
Possible Causes
Probable Solutions
Engine stops
suddenly
1. Low oil shutdown.
1. Fill engine oil to proper level.
Check engine oil before EVERY use.
2. Fuel tank empty or full of impure
or low quality gasoline.
2. Fill fuel tank with fresh 87+
octane unleaded gasoline.
3. Defective fuel tank cap creating
3. Test/replace fuel tank cap.
vacuum, preventing proper fuel flow.
4. Faulty magneto.
4. Have qualified technician service magneto.
5. Disconnected or improperly
connected spark plug cap.
5. Secure spark plug cap.
Engine stops when 1. Dirty air filter
1. Clean or replace element.
under heavy load
2. Engine running cold.
2. Allow engine to warm up prior
to operating equipment.
Engine knocks
1. Old or low quality gasoline.
2. Engine overloaded.
1. Fill fuel tank with fresh 87+
octane unleaded gasoline.
2. Do not exceed equipment’s load rating.
3. Incorrect spark timing, deposit
buildup, worn engine, or other
mechanical problems.
3. Have qualified technician
diagnose and service engine.
Engine backfires
1. Impure or low quality gasoline.
1. Fill fuel tank with fresh 87+
octane unleaded gasoline.
2. Engine too cold.
2. Use cold weather fuel and oil
additives to prevent backfiring.
3. Intake valve stuck or overheated engine.
4. Incorrect timing.
3. Have qualified 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
Download from Www.Somanuals.com. All Manuals Search And Download.
Warranties
Limited 90 Day Warranty
Harbor Freight Tools Co. makes every effort to assure
that its products meet high quality and durability
To take advantage of this warranty, the product or part
must be returned to us with transportation charges
standards, and warrants to the original purchaser that this prepaid. Proof of purchase date and an explanation of
product is free from defects in materials and workmanship the complaint must accompany the merchandise. If our
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.
inspection verifies 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 specific legal rights and you may
also have other rights which vary from state to state.
Emission Control System Warranty
United States Emission Control Defects
Warranty Statement
(for Model 68123)
California and United States Emission Control
Defects Warranty Statement
(for Model 68122)
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 Off-
Road Engine (herein engine). Within the United States, new off-road,
spark-ignition engines certified 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.
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 certified 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.
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.
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.
Where a warrantable condition exists, HFT will repair your
engine at no cost to you including diagnosis, parts and labor.
Vertical Engine
For technical questions, please call 1-800-520-0882.
Page 17
Download from Www.Somanuals.com. All Manuals Search And Download.
4. Coverage Exclusions
Manufacturer’s Warranty Coverage
Warranty claims shall be filed 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:
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
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.
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
Owner’s Warranty Responsibilities
c) Failure to follow recommendations on fuel
use contained in the Owner’s Manual
• 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.
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.
• 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 modifications.
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 first 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 qualified technician/
mechanic to perform all required maintenance, as outlined in the
Inspection, Cleaning, and Maintenance section in this manual.
• 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
6. Warranted Parts
1. Length of Coverage
1) Fuel Metering System
HFT warrants to a first 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 first retail purchaser.
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.
2. No Charge Repair or Replacement
ii) Air cleaner.
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) Ignition System
i)
Spark plug.
ii) Magneto ignition system.
4) Catalyst System (if so equipped)
3. Consequential Damages Coverage
i)
Exhaust pipe stud.
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.
ii) Muffler.
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
Download from Www.Somanuals.com. All Manuals Search And Download.
Parts Lists and Diagrams
Mounting Hole Diagram
Note: Not to scale.
A-A
2:1
1.1 in. / 28mm
0.98 in. / 25mm
A
A
6*Ø0.35 in. / 9mm
Ø0.24 in. / 6mm
Ø8 in. / 203mm
Ø0.34 in. / 8.7mm
Ø1 in. / 25.4mm
Ø0.24 in.
/ 6mm
Ø0.34 in.
/ 8.7mm
3.94 in. / 100mm
3.85 in. / 97.7mm
REV 11f
Vertical Engine
For technical questions, please call 1-800-520-0882.
Page 19
Download from Www.Somanuals.com. All Manuals Search And Download.
68122 Parts List
Part
1
2
3
4
5
6
7
8
Description
Qty.
1
1
1
1
4
1
4
1
1
2
2
1
1
1
2
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
6
1
1
1
1
1
1
2
1
1
1
2
2
2
2
2
1
2
1
Part
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
Description
Plate Asm., Lifter Stopper
Lifter, Valve
Tappet, Valve
Camshaft Asm.
Valve, Exhaust
Starter Asm., Recoil
Housing, Engine
Shroud
Qty.
1
2
2
1
1
1
1
1
3
2
1
1
1
2
1
1
1
1
1
1
2
1
1
1
1
1
3
2
1
2
1
1
1
1
1
4
1
1
1
1
2
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Cover, Cylinder Head
Gasket, Cylinder Head Cover
Head Asm., Cylinder
Gasket, Cylinder Head
Bolt
Plug, Spark
Bolt, Cylinder Head
Bracket, Muffler Shield
Bolt
9
Nut
Stud
Stud
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
Stud
Pin
Crankcase Asm.
Shield, Crankcase Side
Dipstick Asm., Oil
Bolt
Gasket, Insulator Plate
Plate, Carburetor Insulator
Gasket, Carburetor
Gasket, Carburetor Insulator
Carburetor Asm.
Gasket, Air Cleaner
Priming Bulb
Gasket, Air Cleaner
Tube, Breather
Nut
Case, Air Cleaner
Element Asm., Air Cleaner
Cover, Air Cleaner Case
Cover, Muffler Outer
Gasket, Exhaust Outlet
Bolt
Bolt
Muffler Asm.
Bolt
Tank Asm., Fuel
Strainer, fuel
Clamp
Tube, Fuel
Clamp
Bolt
Bracket, Fuel Tank Right
Seal, Oil
Bolt
Bolt
Plate, Breath Groove Cover
Gasket, Breath Groove
Piece, Breath
Strainer, Breath Groove
Shield, Crankcase Rear
Bearing
Bracket, Fuel Tank Left
Bolt
Arm, Governor
Washer
Seal, Oil
Pin
Bracket, Fuel Tank Lower
Bolt
Gasket, Crankcase
Pin
Collar
Washer
Hose, Vapor Rubber
Valve, One Way
Jacket, Rubber
Block, Returning Oil
Bolt
Plate, Governor Spindle Compression
Seal, Oil
100 Hose, Vapor Rubber
101 Clamp
Bolt
102 Hose, Air Cleaner Rubber
103 Collector, Vapor
104 Bracket Asm., Vapor Collector
105 Nut, Flywheel
106 Flywheel Asm.
107 Bolt
108 Coil, Ignition
109 Brake Asm.
110 Bolt
111 Bolt
112 Rod, Governor
113 Spring, Throttle Valve Returning
114 Control Asm., Throttle
115 Bolt
116 Support Asm., Governor
117 Bolt, Governor Support
118 Nut
Gear Asm., Governor
Cover, Crankcase
Ring, The First
Ring, The Second
Ring Set, Oil
Piston
Clip, Piston Pin
Pin, Piston
Rod, Connecting
Crankshaft Asm.
Nut, Valve Lock
Nut_ Valve Adjusting
Seat, Valve Spring
Rocker, Valve
Spring, Valve
Guide, Seal
Bolt, Valve Adjusting
Valve, Intake
119 Spring, Governor
120 Clip
Page 20
For technical questions, please call 1-800-520-0882.
Vertical Engine
Download from Www.Somanuals.com. All Manuals Search And Download.
68122 Assembly Diagram
69
69
69
67
68
70
105
71
70
111
66
106
110
109
107
108
20
20
21
96
91
19
98
97
22
23
24
15
16
99
17
33
96
34
34
25
15
13
100
87
101
102
101
103
18
96
85
90
93
87
87
27
95
89
104
14
47
94
92
88
28
2930
12
46
32
31
86
45
112
116
88
26
49
113
118
119
52
50
120
117
64
11
4
51
48
60
9
8
115
7
114
49
58
59
11
57
57
63
65
62
55
10
53
61
6
63
43
55
54
7
1
56
62
7
10
3
35
80
5
7
59
39
40
36
36
37
56
53
2
54
76
72
73
84
78
82
74
5
75
74
38
83
5
5
79
44
41
77
81
81
42
42
42
42
42
42
Vertical Engine
For technical questions, please call 1-800-520-0882.
Page 21
Download from Www.Somanuals.com. All Manuals Search And Download.
68123 Parts List
Part
1
2
3
4
5
6
7
8
Description
Qty.
1
1
1
1
4
1
4
1
1
2
2
1
1
1
2
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
Part
Description
Qty.
2
1
2
1
1
2
2
1
1
1
1
1
3
2
1
1
1
2
1
1
1
1
1
1
2
1
1
1
1
1
1
3
2
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Cover, Cylinder Head
Gasket, Cylinder Head Cover
Head Asm., Cylinder
Gasket, Cylinder Head
Bolt
55 Spring, Valve
56 Guide, Seal
57 Bolt, Valve Adjusting
58 Valve, Intake
59 Plate Asm., Lifter Stopper
60 Lifter, Valve
61 Tappet, Valve
62 Camshaft Asm.
63 Valve, Exhaust
64 Starter Asm., Recoil
65 Housing, Engine
66 Shroud
Plug, Spark
Bolt, Cylinder Head
Bracket, Muffler Shield
Bolt
9
10 Stud
11 Pin
12 Crankcase Asm.
13 Shield, Crankcase Side
14 Dipstick Asm., Oil
15 Bolt
16 Bolt
17 Bracket, Fuel Tank Right
18 Seal, Oil
19 Bolt
20 Bolt
21 Plate, Breath Groove Cover
22 Gasket, Breath Groove
23 Piece, Breath
24 Strainer, Breath Groove
25 Shield, Crankcase Rear
26 Bearing
27 Bracket, Fuel Tank Left
28 Bolt
29 Arm, Governor
30 Washer
31 Seal, Oil
32 Pin
33 Gasket, Crankcase
34 Pin
35 Washer
67 Nut
68 Stud
69 Stud
70 Gasket, Insulator Plate
71 Plate, Carburetor Insulator
72 Gasket, Carburetor
73 Gasket, Carburetor Insulator
74 Carburetor Asm.
75 Gasket, Air Cleaner
76 Priming Bulb
77 Gasket, Air Cleaner
78 Tube, Breather
79 Nut
80 Case, Air Cleaner
81 Element Asm., Air Cleaner
82 Cover, Air Cleaner Case
83 Cover, Muffler Outer
84 Muffler Asm.
85 Gasket, Exhaust Outlet
86 Bolt
87 Bolt
88 Strainer,Fuel
89 Clamp
90 Tube, Fuel
91 Clamp
36 Block, Returning Oil
37 Bolt
Plate, Governor Spindle
Compression
92 Bolt
38
1
93 Tank Asm., Fuel
94 Nut, Flywheel
95 Flywheel Asm.
96 Bolt
97 Coil, Ignition
98 Brake Asm.
39 Seal, Oil
40 Bolt
1
6
1
1
1
1
1
1
2
1
1
1
2
2
2
2
41 Gear Asm., Governor
42 Cover, Crankcase
43 Ring, The First
44 Ring, The Second
45 Ring Set, Oil
46 Piston
99 Bolt
100 Bolt
101 Rod, Governor
102 Spring, Throttle Valve Returning
103 Control Asm., Throttle
104 Bolt
105 Support Asm., Governor
106 Bolt, Governor Support
107 Nut
47 Clip, Piston Pin
48 Pin, Piston
49 Rod, Connecting
50 Crankshaft Asm.
51 Nut, Valve Lock
52 Nut, Valve Adjusting
53 Seat, Valve Spring
54 Rocker, Valve
108 Spring, Governor
109 Clip
Page 22
For technical questions, please call 1-800-520-0882.
Vertical Engine
Download from Www.Somanuals.com. All Manuals Search And Download.
68123 Assembly Diagram
67
67
67
65
66
68
94
68
100
69
64
95
99
98
96
97
20
20
21
19
22
15
16
93
90
92
23
24
17
25
15
13
18
92
88
27
86
14
89
83
86
86
91
45
28
29
12
44
30
84
32
31
87
87
85
43
101
105
26
47
102
107
108
50
48
106
109
62
11
4
49
46
58
9
8
104
7
103
47
56
57
11
55
55
61
63
60
53
10
51
59
6
61
41
53
7
1
54
54
60
7
10
52
3
33
78
5
7
57
37
38
34
34
35
51
2
52
74
70
71
82
80
76
72
5
73
72
36
81
5
5
77
42
79
79
39
75
40
40
40
40
40
40
Vertical Engine
For technical questions, please call 1-800-520-0882.
Page 23
Download from Www.Somanuals.com. All Manuals Search And Download.
3491 Mission Oaks Blvd. • PO Box 6009 • Camarillo, CA 93011 • (800) 520-0882
Download from Www.Somanuals.com. All Manuals Search And Download.
|