Harbor Freight Tools 61614 Product manual
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.
REV 15e
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.
Visit our website at: http://www.harborfreight.com
Email our technical support at: productsupport@harborfreight.com
When unpacking, make sure that the product is intact
and undamaged. If any parts are missing or broken,
please call 1-888-866-5797 as soon as possible.
Copyright© 2013 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.
Table of Contents
Specifications ............................................. 2
Safety ......................................................... 3
Setup .......................................................... 6
Operation ................................................... 16
Specifications
Displacement 670cc
Engine Type
Cooling System Forced air cooled
Fuel Type
Engine Oil
Sound Level at 3 feet 88 dB
Bore x Stroke 78 mm x 70 mm
Compression Ratio 8.2:1
Rotation viewed from PTO
(power takeoff - the output shaft)
Spark Plugs
Valve Clearance
Speed Idle 1800 RPM
Type
Capacity 2 Quart
Type
Gap 0.7 - 0.8 mm
Intake 0.13 - 0.17 mm
Exhaust 0.18 - 0.22 mm
Shaft Ø1″ x 3.56″
Maintenance .............................................. 20
Troubleshooting ......................................... 24
Warranties ................................................. 26
Parts Lists and Diagrams .......................... 28
Horizontal/Vertical Double Cylinder
4-stroke
87+ octane stabilizer treated
unleaded gasoline
SAE 10W-30 above 32° F
SAE 5W30 at 32° F or below
Counterclockwise
NGK® BPR5ES
Torch® F5RTC
Shaft
The emissions control system for this Engine is warranted for standards set by the
U.S. Environmental Protection Agency and by the California Air Resources Board (also known as CARB).
For warranty information, refer to the last pages of this manual.
Page 2 For technical questions, please call 1-888-866-5797. ITEM 61614
Keyway 1/4″
End Tapped 3/8″ - 24 UNF
Symbol Definitions
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.
SAFETYOPERATIONMAINTENANCE SETUP
Symbol Property or Statement
RPM
HP
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 marking concerning
Risk of Hearing Loss.
Wear hearing protection.
Symbol Property or Statement
WARNING marking concerning
Risk of Respiratory Injury.
Operate engine OUTSIDE and far away
from windows, doors, and vents.
WARNING marking concerning
Risk of Fire while handling fuel.
Do not smoke while handling fuel.
WARNING marking concerning
Risk of Fire.
Do not refuel while operating.
Keep flammable objects
away from engine.
IMPORTANT SAFETY INSTRUCTIONS
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
Page 3For technical questions, please call 1-888-866-5797.ITEM 61614
Set up Precautions
1. Gasoline fuel and fumes are flammable, and
potentially explosive. Use proper fuel storage
and handling procedures. Do not store fuel
SAFETY OPERATION MAINTENANCESETUP
or other flammable materials nearby.
2. Have multiple ABC class fire extinguishers nearby.
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.
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.
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 fuel 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.
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 it from rolling, slipping, and tilting.
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.
6. Use only lubricants and fuel recommended
in the Specifications chart of this manual.
7. Fuel tank must be designed specifically for
containing gasoline and must be mounted to a
stable mounting frame. Some areas may have
specific gasoline vapor containment requirements;
comply with local, state, and federal laws.
9. Industrial applications must follow
OSHA requirements.
10. Do not leave the engine unattended when it is
running. Turn off the engine (and remove safety
keys, if available) before leaving the work area.
11. The engine can produce high noise levels.
Prolonged exposure to noise levels
above 85 dBA is hazardous to hearing.
Wear ear protection when operating the engine
or when working nearby while it is operating.
12. Wear ANSI-approved safety glasses
and hearing protection during use.
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.
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 flammable
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 engine.
Do not use while tired or under the influence
of drugs, alcohol or medication.
17. 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.
18. Parts, especially exhaust system components,
get very hot during use. Stay clear of hot parts.
19. Do not cover the engine during operation.
20. Keep the engine and surrounding
area clean at all times.
Page 4 For technical questions, please call 1-888-866-5797. ITEM 61614
21. 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.
22. Do not operate the equipment with known
leaks in the engine’s fuel system.
23. WARNING: 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.)
Service Precautions
24. 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.
25. Keep hands and feet away from moving parts.
Do not reach over or across
equipment while operating.
26. 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.
27. 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.
SAFETYOPERATIONMAINTENANCE SETUP
1. Before service, maintenance, or cleaning:
a. Turn the engine switch to its “OFF” position.
b. Allow the engine to completely cool.
c. Then, remove the spark plug caps
from the spark plugs.
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.
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.
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 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.
7. Store equipment out of the reach of children.
8. Follow scheduled engine and
equipment maintenance.
Refueling:
1. Do not smoke, or allow sparks, flames,
or other sources of ignition around the
equipment, especially when refuelling.
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 5For technical questions, please call 1-888-866-5797.ITEM 61614
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 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.
WARNING! DO NOT INSTALL THIS ENGINE ON A VEHICLE.
WARNING! INSTALL THIS ENGINE ACCORDING TO EQUIPMENT INSTRUCTIONS BEFORE USE.
WARNING! If you do not connect a battery to the positive battery cable,
wrap its terminal securely with electrical tape (sold separately).
Page 6 For technical questions, please call 1-888-866-5797. ITEM 61614
Components and Controls
Lifting
Bracket
Spark Plug
(1 of 2)
Oil Fill
Plug
Muffler
SAFETYOPERATIONMAINTENANCE SETUP
Dipstick
Lifting
Bracket
Spark Plug
(2 of 2)
Radiator
Starter
Air Cleaner
Choke
Switch
Throttle
Circuit
Breaker
Page 7For technical questions, please call 1-888-866-5797.ITEM 61614
High Altitude Operation Above 3000 feet
WARNING! TO PREVENT SERIOUS INJURY FROM FIRE:
Follow instructions 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 proceeding. Do not smoke.
SAFETY OPERATION MAINTENANCESETUP
NOTICE: Warranty void if necessary adjustments are not made for high altitude use.
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 fuel system on this engine may be influenced by
operation at higher altitudes. Proper operation can be ensured by installing an altitude kit at altitudes higher than
3000 ft. above sea level. At elevations above 8000 ft, the engine may experience decreased performance, even
with the proper main jet. Operating this engine without the proper altitude kit installed may increase the engine’s
emissions and decrease fuel economy and performance. The kit should be installed by a qualified mechanic.
High Altitude Kit Parts List - A
Part Description Qty
A1 Left Main Jet 3000-6000 ft. 1
A2 Right Main Jet 3000-6000 ft. 1
A3 Left Main Jet 6000-8000 ft. 1
Disassembly
1. Turn off the engine.
2. Close the fuel valve, if equipped.
If no fuel valve is equipped, then clamp
the fuel hose closed right before the filter.
Be careful to avoid damaging the fuel hose.
3. Remove the Air Cleaner Top Knob (142a) and the
two Air Cleaner Front Knobs (102). See Figure A.
Air Cleaner
Top Knob (142a)
Air Cleaner
Front Knob
(102)
Part Description Qty
A4 Right Main Jet 6000-8000 ft. 1
137d Outer Bowl O-ring (replacement) 2
137e Inner Bowl O-ring (replacement) 2
4. Remove the Air Cleaner Front Cover (101),
pulling it up then out. See Figure B.
Air Cleaner
Front Cover (101)
Figure B: Remove Front Cover
Figure A: Remove Knobs
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5. Remove the Air Cleaner Top Cover (142b) and
internal Air Cleaner components
(Spacer, Foam and Paper Filters (142c-142e)).
See Figure C.
9. Remove the four Shroud Nuts (99) and the two
Flange Shoulder Bolts (112) from the Shroud (100).
The Flange Shoulder Bolt on the right holds the
Lifting Bracket (111) in place. See Figure E.
Air Cleaner
Top Cover
(142b)
Air Cleaner
Spacer (142c)
Foam Air
Filter (142d)
Paper Air
Filter (142e)
Figure C: Remove Air Cleaner
Top Cover and components
6. Remove the two Intake Cover Bolts (143) and the
two Air Cleaner Base Bolts (146). See Figure D.
7. Detach the top of the Fuel Filter Clip (147)
from the Air Cleaner Base (142g).
Flange
Shoulder
Bolt (112)
Shroud
Nuts (99)
Note: Air Cleaner Front Cover is still shown,
although it should have been removed in step 4.
Figure E: Remove Shroud
10. Remove the Shroud.
Flange Shoulder
Bolt (112)
behind Lifting Bracket
SAFETYOPERATIONMAINTENANCE SETUP
Shroud (100)
Intake Cover
Bolts (143)
Fuel Filter
Clip (147)
Figure D: Remove Bolts and Clip
from Air Cleaner Base
8. Remove the Air Cleaner Base.
Air Cleaner
Base Bolts
(146)
Air Cleaner
Base (142g)
Page 9For technical questions, please call 1-888-866-5797.ITEM 61614
11. WARNING! TO PREVENT SERIOUS INJURY FROM FIRE, BEFORE CONTINUING:
a. Make sure that the work area is well-ventilated and that there are no ignition sources.
b. Have multiple class ABC fire extinguishers available.
c. Double-check that fuel hose leading from fuel tank to Fuel Filter is clamped or fuel valve is closed.
SAFETY OPERATION MAINTENANCESETUP
d. Use a safe, proper means to clean up all fuel spills immediately.
12. Squeeze the Spring Clamp (140) and slide it back.
Detach the Fuel Hose (141) from the port at
the top of the Carburetor. See Figure F.
Spring
Clamp (140)
Fuel
Hose (141)
15. Disconnect the Throttle Rod Spring
from the Throttle Rod Clip.
16. Squeeze the Spring Wire Clamp (32) and slide
it back. Detach the Breather Hose (33) from
the right side of the Carburetor. See Figure I.
Spring Wire
Clamp (32)
fuel
port
Figure F: Detach Fuel Hose
13. Locate the Throttle Rod (174) connection on
the left side of the carburetor. See Figure G.
Throttle
Rod (174)
Throttle Rod
Spring (175)
Throttle Rod
Clip (139)
Figure G: Disconnect Throttle Rod
14. A: Swing the black Throttle Rod Clip (139) down
to release the Throttle Rod. See Figure H.
B: Pull the Throttle Rod out of the Clip.
Breather
Hose (33)
Figure I: Detach Breather Hose
17. Locate the Choke Rod (177) connection on the
right side of the carburetor. See Figure J.
Choke Rod
Clip (176)
Choke
Rod (177)
Figure J: Disconnect Choke Rod
18. Swing the black Choke Rod Clip (176) aside to
release the Choke Rod. Disconnect the Choke Rod.
B
A
Figure H: Throttle Rod Clip
Page 10 For technical questions, please call 1-888-866-5797. ITEM 61614
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