Predator Engines 62879 User manual

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ITEM 62879
708
cc
GASOLINE ENGINE
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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. 17e
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© 2015 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 assem bly and service may not be included.
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Page 2 K&(%$*4.8"4,7%P'*#$"&8#J%/7*,#*%4,77%QRSSSRSTTRUVWV1 ITEM 62879
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Specifications ............................................. 2
Safety ......................................................... 3
Setup .......................................................... 6
Operation ................................................... 14
Maintenance .............................................. 16
Troubleshooting ......................................... 20
Warranties ................................................. 22
Parts Lists and Diagrams .......................... 24
F/*4"2"4,$"&8#
Displacement 708 cc
Engine Type Vertical Double Cylinder
4-stroke
Cooling System Forced air cooled
Fuel Type 87+ octane stabilizer treated
unleaded gasoline
Engine Oil Type SAE 10W-30 above 32° F
SAE 5W30 at 32° F or below
Capacity 1.8 Liters
Sound Level at 3 feet 88 dB
Bore x Stroke 77 mm x 76 mm
Compression Ratio 8.7:1
Rotation viewed from PTO
(power takeoff - the output shaft) Counterclockwise
Oil Filter Compatibility STP S4967
Fram PH4967
Spark Plugs Type Champion® RN9YC
Gap 0.029″
Valve Clearance Intake 0.003″– 0.005″
Exhaust 0.005″– 0.007″
Speed Idle 1800 ±150 RPM
Maximum 3600 ±100 RPM
Shaft
Shaft Ø1″ x 3.156″
Keyway 1/4″
End Tapped 7/16″– 20 UNF
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 3K&(%$*4.8"4,7%P'*#$"&8#J%/7*,#*%4,77%QRSSSRSTTRUVWV1ITEM 62879
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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.
FH5+&7%L*2"8"$"&8#
FH5+&7 X(&/*($H%&(%F$,$*5*8$
IXD Revolutions Per Minute
OX 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.
FH5+&7 X(&/*($H%&(%F$,$*5*8$
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.
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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.
F=!6%EO6F6%@>FEI;<E@C>F

Page 4 K&(%$*4.8"4,7%P'*#$"&8#J%/7*,#*%4,77%QRSSSRSTTRUVWV1 ITEM 62879
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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.
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.
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. K'*7%$,8]%5'#$%+*%9*#"38*9%#/*4"2"4,77H%2&(%
4&8$,"8"83%3,#&7"8*%,89%5'#$%+*%5&'8$*9%$&%,%
#$,+7*%5&'8$"83%2(,5*1 Some areas may have
specific gasoline vapor containment requirements;
comply with local, state, and federal laws.
8. Fuel lines and fittings must be properly
assembled and must not leak.
9. All wiring, including safety switches and
engine shut-off components, must be
properly assembled and functional.
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1. <=I[C>%DC>C^@L6%O=_=IL%
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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.
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.

Page 5K&(%$*4.8"4,7%P'*#$"&8#J%/7*,#*%4,77%QRSSSRSTTRUVWV1ITEM 62879
F=K6EBCX6I=E@C>D=@>E6>=><6 F6E;X
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.
21. Do not smoke, or allow sparks, flames,
or other sources of ignition around the
equipment, especially when refuelling.
22. 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.
23. Do not operate the equipment with known
leaks in the engine’s fuel system.
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.
@2%9,5,3*9J%.,M*%$.*%*P'"/5*8$%#*(M"4*9%
+*2&(*%'#"831 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.
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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. L&%8&$%,7$*(%&(%,9N'#$%,8H%/,($%&2%$.*%
*P'"/5*8$%&(%"$#%*83"8*%$.,$%"#%#*,7*9%+H%$.*%
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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.
I*2'*7"83-
1. Do not refill the fuel tank while the
engine is running or hot.
2. Do not smoke, or allow sparks, flames,
or other sources of ignition around the
equipment, especially when refuelling.
3. L&%8&$%2"77%2'*7%$,8]%$&%$.*%$&/1%%%
Leave a little room for the fuel to expand as needed.
4. Refuel in a well-ventilated area only.
5. Wipe up any spilled fuel and allow excess
to evaporate before starting engine.
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1. Mount Engine, Shaft-side down, to equipment
platform. Secure with Bolts. See Figure A.
2. Run choke and throttle cables (neither
included) through Engine loops. Pass both
through the Group Loop, then the choke
cable through Loop A and the throttle
cable through Loop B. See Figure B.
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Page 7K&(%$*4.8"4,7%P'*#$"&8#J%/7*,#*%4,77%QRSSSRSTTRUVWV1ITEM 62879
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3. Hook cables to Choke and Throttle. For
some cable types, additional hardware (not
included) may be required. See Figure C.
4. Tighten loops.
5. Plug equipment electrical hookup to engine
wiring harness. See Figure D.
>&$*- Connect equipment according
to the Wiring Harness diagram.
See Fuel Tank Setup Instructions.
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Page 8 K&(%$*4.8"4,7%P'*#$"&8#J%/7*,#*%4,77%QRSSSRSTTRUVWV1 ITEM 62879
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Y=I>@>Z\ Fuel tank (not included) must be
CARB compliant and designed specifically for
containing gasoline or voids warranty. The tank
must be mounted to a stable mounting frame.
1. Connect a fuel hose (not included) from the
fuel tank to the Fuel Hose Connector, and
secure it in place with a hose clamp. See
Figure F. If possible, incorporate a fuel shutoff
valve (not included) on the fuel hose.
2. Connect a hose to the Fuel Vapor
Inlet on the Air Intake to contain
gasoline vapors. See Figure G.
Y=I>@>Z\ The end user is responsible for
complying with all applicable CARB and EPA
evaporative emissions requirements for the
fuel system. Some areas may have specific
gasoline vapor containment requirements;
comply with local, state, and federal laws.
K'*7%O&#*%
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1. Equipment should include a fully charged, lead-
acid 12 volt, 36 Ah battery (not included)
2. To connect equipment solenoid to Engine
Starter, only use cables sized to match
their length according to Table A.
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3. Attach the positive cable from the positive
battery terminal to the outer terminal on the
Starter. Connect cable securely to prevent
disconnection and short circuits. See Figure H.
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4. Connect the negative cable securely to one of the
engine mounting bolts. Connect cable securely
to prevent disconnection and short circuits.
5. Coat the terminals and cable ends with
a corrosion-preventive coating.

Page 9K&(%$*4.8"4,7%P'*#$"&8#J%/7*,#*%4,77%QRSSSRSTTRUVWV1ITEM 62879
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Page 10 K&(%$*4.8"4,7%P'*#$"&8#J%/7*,#*%4,77%QRSSSRSTTRUVWV1 ITEM 62879
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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.
>CE@<6- 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.
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A1 Main Jet 3000-6000 ft. 2
A2 Main Jet 6000-8000 ft. 2
B1 Outer Bowl O-ring (replacement) 1
X,($ L*#4("/$"&8 c$H
B2 Inner Bowl O-ring (replacement) 1
5 Gasket, Ex, Pipe 1
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1. Turn off the engine.
2. Close the fuel valve, if equipped.
If no fuel valve is equipped, clamp the fuel
hose closed right before the filter. Be careful
to avoid damaging the fuel hose.
3. Place the Engine on its back, with the
Muffler on top. See Figure I.
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4. Remove the two M8 x 20 Flange Bolts
that hold the Muffler in place on the
Muffler Bracket. See Figure J.
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5. Remove the four M8 x 20 Flange Bolts that attach
the Muffler Exhaust Pipes to the Cylinder Heads
and remove the Muffler. Refer to Figure K.
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Page 11K&(%$*4.8"4,7%P'*#$"&8#J%/7*,#*%4,77%QRSSSRSTTRUVWV1ITEM 62879
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6. Remove the M6 x 16 Flange Bolts (2) that
attach the Muffler Bracket and Throttle
Assembly (69) to the Engine. See Figure L.
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7. Remove the Muffler Bracket.
8. Unhook the Choke Rod from the
Throttle Assembly. See Figure M.
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9. Remove the Throttle Assembly and lay it back
against the Engine. Remove the Governor Springs
from hole D in the Governor Arm. See Figure N.
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10. Rotate the Choke Rod into an upward
facing position. See Figure O.
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Page 12 K&(%$*4.8"4,7%P'*#$"&8#J%/7*,#*%4,77%QRSSSRSTTRUVWV1 ITEM 62879
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b. O,M*%5'7$"/7*%47,##%=[<%2"(*%*G$"83'"#.*(#%,M,"7,+7*1
c. L&'+7*R4.*4]%$.,$%2'*7%.&#*%7*,9"83%2(&5%2'*7%$,8]%$&%K'*7%K"7$*(%"#%47,5/*9%&(%2'*7%M,7M*%"#%47&#*91
d. ;#*%,%#,2*J%/(&/*(%5*,8#%$&%47*,8%'/%,77%2'*7%#/"77#%"55*9",$*7H1
12. Return the Engine to its feet, and remove the Fuel
Drain Bolt from the Carburetor Bowl. See Figure P.
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13. Drain the Carburetor and allow it to dry.
14. Mount the Fuel Drain Bolt back onto the Carburetor
Bowl. Torque the Fuel Drain Bolt to 4-6 ft.lb.
15. Turn the Engine back onto its back.
16. Remove the four Carburetor Bowl
Screws (137b) and remove the Carburetor
Bowl (137c). See Figure Q.
<,(+'(*$&(%[&)7
<,(+'(*$&(%
[&)7%F4(*)#
K"3'(*%c
17. Place the Carburetor Bowl to the side
of the Carburetor. See Figure R.
<,(+'(*$&(%[&)7
<,(+'(*$&(
K"3'(*%I
18. Use a carburetor screwdriver (sold separately) to
remove the Main Left Jet and replace it with the
replacement Main Left Jet (A1 or A2) appropriate
to the altitude. See Figure S: Main Jets.
D,"8%A*2$%b*$
D,"8%I"3.$%b*$
K"3'(*%F-%%D,"8%b*$#
19. Use a carburetor screwdriver (sold separately)
to remove the Main Right Jet and replace it
with the replacement Main Right Jet (A1 or A2)
appropriate to the altitude.

Page 13K&(%$*4.8"4,7%P'*#$"&8#J%/7*,#*%4,77%QRSSSRSTTRUVWV1ITEM 62879
F=K6EBCX6I=E@C>D=@>E6>=><6 F6E;X
I*,##*5+7H
>&$*- Reassembly step references shown in brackets.
1. Replace the Outer and Inner Bowl O-rings (B1, B2)
with the replacements from the altitude kit.
Do not reuse existing O-rings.
<,(+'(*$&(%
[&)7
C'$*(%[&)7%
CR("83
@88*(%[&)7%
CR("83
K"3'(*%E-%%I*/7,4*%[&)7%CR("83#
2. Assemble the Carburetor Bowl using
four Carburetor Bowl Bolts (11). Torque
the Fuel Drain Bolt to 4.4-6.6 ft.lb.
3. Reattach Governor Spring to Governor Arm hole D.
E.(&$$7*%
=##*5+7H
Z&M*(8&(%
F/("83
Z&M*(8&(%
=(5
K"3'(*%;
4. Rehook the Choke Rod (10) to
the Throttle Assembly (6).
5. Reattach the Exhaust Gasket (5) and re-mount the
Muffler (3) to the Engine using M8 x 20 Bolts (4)
6. Return the Engine to its feet.
7. Once all connections are secure,
open fuel valve/unclamp fuel hose.
8. 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.

Page 14 K&(%$*4.8"4,7%P'*#$"&8#J%/7*,#*%4,77%QRSSSRSTTRUVWV1 ITEM 62879
F=K6EB CX6I=E@C> D=@>E6>=><6F6E;X
C/*(,$"&8%
I*,9%$.*%6>E@I6%@DXCIE=>E%F=K6EB%@>KCID=E@C>%#*4$"&8%,$%$.*%+*3"88"83%&2%$."#%5,8',7%
"847'9"83%,77%$*G$%'89*(%#'+.*,9"83#%$.*(*"8%+*2&(*%#*$%'/%&(%'#*%&2%$."#%/(&9'4$1
X(*RF$,($%<.*4]#
Inspect engine and equipment looking for damaged, loose, and missing parts before set up and starting.
If any problems are found, do not use equipment until fixed properly.
<.*4]"83%,89%K"77"83%683"8*%C"7
>CE@<6-%%B&'(%Y,((,8$H%"#%!C@L%"2%$.*%*83"8*k#%
4(,8]4,#*%"#%8&$%/(&/*(7H%2"77*9%)"$.%&"7%+*2&(*%
*,4.%'#*1%%[*2&(*%*,4.%'#*J%4.*4]%$.*%&"7%7*M*71%%
1. Make sure the engine is stopped and is level.
2. Close the Fuel Valve, if equipped.
3. Clean the top of the Dipstick and the
area around it. Pull the Dipstick out,
and wipe it off with a clean, lint free rag.
4. Reinsert the Dipstick and remove it to
check the oil level. The oil level should be
up to the upper mark on the dipstick.
5. If the oil level is at or below the low mark,
remove the Oil Fill Plug and add the appropriate
type of oil until the oil level is at the proper level.
SAE 10W-30 oil is recommended for general use.
(Table B: SAE Viscosity Grade on page 17 in the
Maintenance section shows other viscosities to use
in different average temperatures.)
Replace the Oil Fill Plug.
6. Insert the Dipstick back into the housing.
L"/#$"4]%
d+*8*,$.%
C"7%K"77%
X7'3e
C"7%K"77%X7'3
K"3'(*%!-%%C"7%K"77%,89%L"/#$"4]
<.*4]"83%,89%K"77"83%K'*7
>&$*- Fuel tank is not included. Before
filling, connect fuel tank properly as per
fuel tank manufacturer’s instructions.
Y=I>@>Z\ EC%XI6!6>E%F6I@C;F%
@>b;IB%KICD%K@I6-
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. Remove the Strainer and remove any dirt
and debris. Then replace the Strainer.
>&$*-%%L&%8&$%'#*%3,#&7"8*%4&8$,"8"83%5&(*%$.,8%
Qjl%*$.,8&7%d6Qje1%%L&%8&$%'#*%6SU%*$.,8&71%%=99%2'*7%
#$,+"7"m*(%$&%$.*%3,#&7"8*%&(%$.*%Y,((,8$H%"#%!C@L1
>&$*-%%L&%8&$%'#*%3,#&7"8*%$.,$%.,#%+**8%#$&(*9%"8%,%
5*$,7%2'*7%4&8$,"8*(%&(%,%9"($H%2'*7%4&8$,"8*(1%%@$%4,8%
4,'#*%/,($"47*#%$&%*8$*(%$.*%4,(+'(*$&(J%,22*4$"83%
*83"8*%/*(2&(5,84*%,890&(%4,'#"83%9,5,3*1
4. If needed, fill the Fuel Tank to about 1 inch under
the fill neck of the Fuel Tank with 87 octane or
higher unleaded gasoline that has been treated
with a fuel stabilizer additive. Follow fuel stabilizer
manufacturer’s recommendations for use.
5. Then replace the Fuel Cap.
6. 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.

Page 15K&(%$*4.8"4,7%P'*#$"&8#J%/7*,#*%4,77%QRSSSRSTTRUVWV1ITEM 62879
F=K6EBCX6I=E@C>D=@>E6>=><6 F6E;X
F$,($"83%$.*%683"8*
[*2&(*%#$,($"83%$.*%*83"8*-
a. K&77&)%$.*%F*$%;/%@8#$('4$"&8#%"8%$."#%5,8',7%$&%/(*/,(*%$.*%*83"8*1
b. K&77&)%$.*%F*$%;/%@8#$('4$"&8#%"8%$.*%*P'"/5*8$%5,8',7%$&%/(*/,(*%$.*%*P'"/5*8$1
c. @8#/*4$%$.*%*P'"/5*8$%,89%*83"8*1
d. K"77%$.*%*83"8*%)"$.%$.*%/(&/*(%,5&'8$%,89%$H/*%&2%+&$.%
#$,+"7"m*(R$(*,$*9%'87*,9*9%3,#&7"8*%,89%&"71
e. I*,9%$.*%6P'"/5*8$%C/*(,$"&8%#*4$"&8%"8%$.*%*P'"/5*8$%5,8',71
>CE@<6- Engine is not equipped with its own starting
controls. Use equipment controls to start engine.
1. To start a cold engine, position the choke
at the START position.
To restart a warm engine, position
the choke at the RUN position.
2. Open the fuel valve, if equipped.
3. Slide the throttle or speed control to
1/3 away from the SLOW position.
>&$*- Some tools have speed control located
elsewhere on the tool which functions the same
as the throttle. Use the speed control in place
of the throttle when the tool is so equipped.
4. Engage the start control until the Engine
starts, no more than a few seconds. Release
the start control when the Engine starts.
>&$*- If the engine does not start after
5 seconds, release the start control and wait
at least 10 seconds before trying again.
5. Allow the Engine to run for several seconds.
Then, if the choke is in the START position, move
the Choke very slowly to its RUN position.
>&$*- Moving the Choke too fast could stall the engine.
@DXCIE=>E- Allow the engine to run at
no load for five minutes after each start-up
so that the engine can stabilize.
6. Adjust the Throttle as needed.
>&$*- Adjust idle speed with the Idle Screw, located
underneath the Air Cleaner. See Figure V.
@97*%F4(*)
K"3'(*%Y-%%@97*%F4(*)
Actual idle speed depends on application. Refer
to equipment manufacturer’s recommendations.
Running idle speed too low may result in performance
issues, including excessive engine wear.
[(*,]R"8%X*("&9-
a. Breaking-in the engine will help to ensure
proper equipment and engine operation.
b. The operational break-in period will last
about 3 hours of use. During this period:
• Do not apply a heavy load to the equipment.
• Do not operate the engine at
its maximum speed.
c. The maintenance break-in period
will last about 20 hours of use.
• Change the engine oil after this period.
Under normal operating conditions subsequent
maintenance follows the schedule explained
in the MAINTENANCE section.
F$&//"83%$.*%683"8*
1. To stop the engine in an emergency,
turn the start control to OFF.
2. Under normal conditions, use
the following procedure:
a. Slide the throttle or speed control
to SLOW (the ″turtle”).
b. Turn the start control to OFF.
c. Close the Fuel Valve, if equipped.
NOTICE
L(,"8%2'*7%,$%*89%&2%#*,#&8%
&(%),((,8$H%"#%M&"91
See Storage on page 19 for
complete storage instructions.

Page 16 K&(%$*4.8"4,7%P'*#$"&8#J%/7*,#*%4,77%QRSSSRSTTRUVWV1 ITEM 62879
F=K6EB CX6I=E@C> D=@>E6>=><6F6E;X
D,"8$*8,84*
Y=I>@>Z
EC%XI6!6>E%F6I@C;F%@>b;IB%KICD%=<<@L6>E=A%FE=IE@>Z-%
E'(8%$.*%X&)*(%F)"$4.%&2%$.*%*P'"/5*8$%$&%"$#%`CKKa%/&#"$"&8J%),"$%2&(%$.*%*83"8*%$&%4&&7J%,89%9"#4&88*4$%
$.*%#/,(]%/7'3%4,/#%+*2&(*%/*(2&(5"83%,8H%"8#/*4$"&8J%5,"8$*8,84*J%&(%47*,8"83%/(&4*9'(*#1
EC%XI6!6>E%F6I@C;F%@>b;IB%KICD%6c;@XD6>E%K=@A;I6-%
L&%8&$%'#*%9,5,3*9%*P'"/5*8$1%%@2%,+8&(5,7%8&"#*J%M"+(,$"&8J%&(%
*G4*##%#5&]"83%&44'(#J%.,M*%$.*%/(&+7*5%4&((*4$*9%+*2&(*%2'($.*(%'#*1
K&77&)%,77%#*(M"4*%"8#$('4$"&8#%"8%$."#%5,8',71%%E.*%*83"8*%5,H%2,"7%4("$"4,77H%"2%8&$%#*(M"4*9%/(&/*(7H1
D,8H%5,"8$*8,84*%/(&4*9'(*#J%"847'9"83%,8H%8&$%9*$,"7*9%"8%$."#%5,8',7J%)"77%8**9%$&%+*%/*(2&(5*9%
+H%,%P',7"2"*9%$*4.8"4",8%2&(%#,2*$H1%%@2%H&'%.,M*%,8H%9&'+$#%,+&'$%H&'(%,+"7"$H%$&%#,2*7H%#*(M"4*%$.*%
*P'"/5*8$%&(%*83"8*J%.,M*%,%P',7"2"*9%$*4.8"4",8%#*(M"4*%$.*%*P'"/5*8$%"8#$*,91
<7*,8"83J%D,"8$*8,84*J%,89%A'+("4,$"&8%F4.*9'7*
>&$*- 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.
>&$*- The following procedures are in addition to the regular checks and maintenance
explained as part of the regular operation of the engine and equipment.
X(&4*9'(* [*2&(*%
6,4.%;#*
D&8$.7H%&(%
*M*(H%gj%
.(1%&2%'#*
6M*(H%i%5&1%&(%
Uj%.(1%&2%'#*
6M*(H%T%5&1%&(%
Qjj%.(1%&2%'#*%
B*,(7H%&(%%
*M*(H%ijj%
.(1%&2%'#*
6M*(H%
g%B*,(#
Brush off outside of engine
Check engine oil level
Check air cleaner
Change engine oil and oil filter
Clean/replace air filter *
1. Check and clean spark plugs
2. Replace fuel filter.
1. Check/adjust idle speed
2. Check/adjust valve clearance
3. Clean fuel tank, strainer
and carburetor
4. Clean carbon build-up from
combustion chambers
** **
Replace fuel line if necessary **
*Service more frequently when used in dusty areas.
**These items should be serviced by a qualified technician.

Page 17K&(%$*4.8"4,7%P'*#$"&8#J%/7*,#*%4,77%QRSSSRSTTRUVWV1ITEM 62879
F=K6EBCX6I=E@C>D=@>E6>=><6 F6E;X
<.*4]"83%,89%K"77"83%K'*7
>&$*- Fuel tank is not included. Before
filling, connect fuel tank properly as per
fuel tank manufacturer’s instructions.
Y=I>@>Z\ EC%XI6!6>E%F6I@C;F%
@>b;IB%KICD%K@I6-
Fill the fuel tank in a well-ventilated area
away from ignition sources. If the engine
is hot from use, shut the engine off and
wait for it to cool before adding fuel. Do not smoke.
1. Clean the Fuel Cap and the area around it.
2. Unscrew and remove the Fuel Cap.
3. Remove the Strainer and remove any dirt
and debris. Then replace the Strainer.
>&$*-%%L&%8&$%'#*%3,#&7"8*%4&8$,"8"83%5&(*%$.,8%
Qjl%*$.,8&7%d6Qje1%%L&%8&$%'#*%6SU%*$.,8&71%%=99%2'*7%
#$,+"7"m*(%$&%$.*%3,#&7"8*%&(%$.*%Y,((,8$H%"#%!C@L1
>&$*-%%L&%8&$%'#*%3,#&7"8*%$.,$%.,#%+**8%#$&(*9%"8%,%
5*$,7%2'*7%4&8$,"8*(%&(%,%9"($H%2'*7%4&8$,"8*(1%%@$%4,8%
4,'#*%/,($"47*#%$&%*8$*(%$.*%4,(+'(*$&(J%,22*4$"83%
*83"8*%/*(2&(5,84*%,890&(%4,'#"83%9,5,3*1
4. If needed, fill the Fuel Tank to about 1 inch under
the fill neck of the Fuel Tank with 87 octane or
higher unleaded gasoline that has been treated
with a fuel stabilizer additive. Follow fuel stabilizer
manufacturer’s recommendations for use.
5. Then replace the Fuel Cap.
6. Wipe up any spilled fuel and allow excess
to evaporate before starting engine.
To prevent FIRE, do not start the engine
while the smell of fuel hangs in the air.
683"8*%C"7%<.,83*
<=;E@C>\ Oil is very hot during operation and can
cause burns. Wait for engine to cool before changing oil.
1. Make sure the engine is stopped and is level.
2. Close the fuel valve, if equipped.
3. Place a drain pan (not included) underneath
the crankcase’s Oil Drain Plug.
4. Remove the Oil Drain Plug and, if possible,
tilt the crankcase slightly to help drain the oil out.
Recycle used oil.
5. Replace the Oil Drain Plug and tighten it.
6. Move the drain pan underneath the Oil Filter.
7. Unthread and remove the Oil Filter. Allow the
oil to drain out of the filter completely before
disposal. Dispose of oil properly or recycle it.
8. Install a new Oil Filter of the same size and
type, either STP S4967 or Fram PH4967.
9. Clean the top of the Dipstick and the
area around it. Pull the Dipstick out,
and wipe it off with a clean, lint free rag.
10. Remove the Oil Fill Plug and add the appropriate
type of oil until the oil level is at the proper level.
SAE 10W-30 oil is recommended for general use.
The SAE Viscosity Grade chart shows other
viscosities to use in different average temperatures.
Replace the Oil Fill Plug.
11. Insert the Dipstick back into the housing.
L"/#$"4]%
d+*8*,$.%
C"7%K"77%
X7'3e
C"7%K"77%X7'3
C"7%K"7$*(
C"7%L(,"8%X7'3
K"3'(*%^-%%C"7%L(,"8%,89%C"7%K"7$*(%A&4,$"&8
QjYRij
ij
UYRij
-20 0 20 40 60 80 100°F
=M*(,3*%&'$9&&(%$*5/*(,$'(*
E,+7*%[-%%F=6%!"#4&#"$H%Z(,9*

Page 18 K&(%$*4.8"4,7%P'*#$"&8#J%/7*,#*%4,77%QRSSSRSTTRUVWV1 ITEM 62879
F=K6EB CX6I=E@C> D=@>E6>=><6F6E;X
="(%K"7$*(%D,"8$*8,84*
1. Remove the Air Cleaner Top Cover and
the air filter elements and check for
dirt. Clean as described below.
2. Clean Paper Air Filter:
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 Filter.
3. Clean Foam Air Filter:
Wash the Filter 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. Use a moist rag to wide dirt from the
inside of the Air Cleaner body.
5. Install the cleaned filter. Secure the Air
Cleaner Top Cover before use.
F/,(]%X7'3%D,"8$*8,84*
1.
F/,(]%
X7'3%
<,/
Disconnect spark plug caps from ends of plugs.
Clean out debris from around spark plugs.
2. Using a spark plug wrench, remove the spark plugs.
3. Inspect the spark plugs:
If the electrode(s) is oily, clean it using a clean,
dry rag. If the electrode(s) has deposits on it, polish
it using emery paper. If the white insulator is cracked
or chipped, the spark plug needs to be replaced.
I*4&55*89*9%F/,(]%X7'3#
TORCH®F5RTC
NGK®BPR5ES
CHAMPION®RN9YC
>&$*- Some areas may require resistor spark plugs.
>CE@<6- Using an incorrect spark plug
may damage the engine.
4. When installing a new spark plug(s),
adjust the plug’s gap to the specification on the
Specifications chart. Do not pry against the
electrode, the spark plug can be damaged.
5. Install the new spark plug(s) or
the cleaned spark plug(s) into the engine.
• Z,#]*$R#$H7*:
Finger-tighten until the gasket
contacts the cylinder head,
then tighten about 1/2-2/3 turn more.
• >&8R3,#]*$R#$H7*:
Finger-tighten until the plug
contacts the cylinder head,
then tighten about 1/16 turn more.
>CE@<6- Tighten the spark plugs properly.
@2%7&&#*, the spark plugs will cause the
engine to overheat.
@2%&M*($"3.$*8*9, the threads in the
engine block will be damaged.
6. Apply dielectric spark plug boot protector
(not included) to the end of the spark plugs
and reattach the wires securely.

Page 19K&(%$*4.8"4,7%P'*#$"&8#J%/7*,#*%4,77%QRSSSRSTTRUVWV1ITEM 62879
F=K6EBCX6I=E@C>D=@>E6>=><6 F6E;X
F$&(,3*
When the equipment is to remain idle for longer than
20 days, prepare the Engine for storage as follows:
1. <A6=>@>Z:
Wait for Engine to cool, then clean Engine with
dry cloth. >CE@<6- L&%8&$%47*,8%'#"83%),$*(1
The water will gradually enter the Engine
and cause rust damage. Apply a thin coat
of rust preventive oil to all metal parts.
2. K;6A-
To protect the fuel tank during storage, fill the
tank with gasoline that has been treated with
a fuel stabilizer additive. Follow fuel stabilizer
manufacturer’s recommendations for use. Refer
to Checking and Filling Fuel on page 14.
Y=I>@>Z\ EC%XI6!6>E%F6I@C;F%
@>b;IB%KICD%K@I6-
Fill tank in a well-ventilated area away from
ignition sources. If the engine is hot from
use, shut the engine off and wait for it to
cool before adding fuel. Do not smoke.
3. A;[I@<=E@C>-
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. [=EE6IB-%
Disconnect battery cables (if equipped).
Recharge batteries monthly while in storage.
5. FECI=Z6%=I6=-%
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.
>CE@<6- During extended storage periods the
Engine must be started every 3 months and allowed
to run for 15 – 20 minutes or the Warranty is VOID.
6. =KE6I%FECI=Z6-%
Before starting the Engine during or 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.

Page 20 K&(%$*4.8"4,7%P'*#$"&8#J%/7*,#*%4,77%QRSSSRSTTRUVWV1 ITEM 62879
F=K6EB CX6I=E@C> D=@>E6>=><6F6E;X
E(&'+7*#.&&$"83
X(&+7*5 X&##"+7*%<,'#*# X(&+,+7*%F&7'$"&8#
Engine will not start FUEL RELATED:
1. No fuel in tank or fuel valve closed.
2. Choke not in START position, cold engine.
3. Gasoline with more than 10% ethanol used.
(E15, E20, E85, etc.)
4. Low quality or deteriorated, old gasoline.
5. Carburetor not primed.
6. Dirty fuel passageways.
7. Carburetor needle stuck.
Fuel can be smelled in the air.
8. Too much fuel in chamber. This can be caused
by the carburetor needle sticking.
9. Clogged Fuel Filter.
FUEL RELATED:
1. Fill fuel tank with fresh 87+ octane stabilizer-
treated unleaded gasoline and open fuel
valve.%
L&%8&$%'#*%3,#&7"8*%)"$.%5&(*%$.,8%
Qjl%*$.,8&7%d6QUJ%6gjJ%6SUJ%*$41e1
2. Move Choke to START position.
3. Clean out ethanol rich gasoline from fuel
system. Replace components damaged by
ethanol. Use fresh 87+ octane stabilizer-
treated unleaded gasoline only. %%
L&%8&$%'#*%3,#&7"8*%)"$.%5&(*%$.,8%
Qjl%*$.,8&7%d6QUJ%6gjJ%6SUJ%*$41e1
4. Use fresh 87+ octane stabilizer-treated
unleaded gasoline.%
L&%8&$%'#*%3,#&7"8*%)"$.%5&(*%$.,8%
Qjl%*$.,8&7%d6QUJ%6gjJ%6SUJ%*$41e1
5. Pull on Starter Handle to prime.
6. Clean out passageways using fuel additive.
Heavy deposits may require further cleaning.
7. Z*8$7H tap side of carburetor float
chamber with screwdriver handle.
8. Turn Choke to RUN position. Remove
spark plug and pull the start handle several
times to air out the chamber. Reinstall
spark plug and set Choke to START position.
9. Replace Fuel Filter.
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. Circuit breaker tripped.
6. Incorrect spark timing or faulty ignition system.
IGNITION (SPARK) RELATED:
1. Connect spark plug cap properly.
2. Clean spark plug.
3. Correct spark plug gap.
4. Replace spark plug cap.
5. Reset circuit breaker. Check wiring and
starter motor if breaker continues to trip.
6. Have qualified technician diagnose/
repair 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.
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 qualified technician adjust/
repair valves and tappets.
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