Tecumsehpower OH318, OH318EA User Manual
s
Operator’s Manual
OH318EA (OHM90-110)
Four-Cycle Engine • Horizontal Crankshaft • Air-Cooled
Table of Contents
IMPORTANT NOTICE! Safety Definitions ...................................... ii
I. General Safety Precautions ............................................................ 1
II. How to Get Service ......................................................................... 3
III. Oil and Fuel Specifications ............................................................. 4
IV. Before Starting Your Engine ............................................................ 4
V. Starting Your Engine ....................................................................... 7
VI. Stopping Your Engine and Short-Term Storage ............................ 12
VII. Maintenance ................................................................................. 12
VIII. Transporting Your Engine ............................................................. 16
IX. Storing Your Engine ...................................................................... 17
X. Preventing Forest, Brush and Grass Fires ................................... 18
XI. Maintenance Intervals.................................................................... 19
California & US EPA Emission Control Warranty Statement ........ 20
Emission Control System Warranty .............................................. 21
XII. Warranty Information .....................................................................22
Visit our web site at www.TecumsehPower.com
Register Your TecumsehPower Engine
Maintenance Tips
On-Line Store
Locate your nearest TecumsehPower Servicing Dealer
LOG ON!
181-719-14
(English) 6/01/08
IMPORTANT NOTICE!
Safety Definitions
Statements in this manual preceded by the following words
and graphics are of special significance:
!
WARNING
Or
WARNING
WARNING indicates a potentially hazardous situation
which if NOT avoided, could result in death or serious
injury.
CAUTION
Indicates a potentially hazardous situation which, if NOT
avoided, may result in minor or moderate injury.
CAUTION
Indicates a potential situation which, if NOT avoided, could
result in equipment or property damage.
NOTE
Refers to important information and is placed in italic type.
It is recommended that you take special notice of all items
discussed on the next two pages and wear the appropriate
safety equipment.
Before operating this engine it is your responsibility to read
this Operator’s Manual. Follow these basic rules for your
personal safety:
• Keep this manual handy at all times for future
reference.
• Read it carefully and familiarize yourself with
operating, maintenance, components and safety
instructions.
Notice Regarding Emissions
NOTE
Engines which are certified to comply with California and
U.S. EPA emission regulations for SORE (Small Off Road
Equipment), are certified to operate on regular unleaded
gasoline, and may include the following emission control
systems: (EM) Engine Modification and (TWC) Three-way
Catalyst (if so equipped).
TecumsehPower Contact Information
For engine adjustments, repairs or warranty service
NOT covered in this manual, contact your nearest
Authorized TecumsehPower Servicing Dealer. Find them
on our website at www.TecumsehPower .co m or call
TecumsehPower Company at 1-800-558-5402 for
additional information.
The trade marks T ECUMSE H® and the DES IGN (Nat ive Ame rican Head l ogo) are registered trademarks of Tecumseh
Products Company and are used by TecumsehPower Company under license from Tecumseh Products Company.
TecumsehPower Company is no longer owned by Tecumseh Products Company nor is it associated or affiliated in any
way with Tecumseh Products Company .
©Copyright 2006, 2008
TecumsehPo wer Company
All Rights Reserved
Page ii Four-Cycle Engine • Horizontal Crankshaft • Air-Cooled 181-719-14
I. General Safety Precautions
!
WARNING
Read equipment manufacturer’s manual and this
material thoroughly before using this engine. Failure to
do so can result in serious injury or death. Consult your
local Authorized TecumsehPower Servicing Dealer, call
1-800-558-5402, or go to www.TecumsehPower.com for
additional information.
A. Avoid Carbon Monoxide Poisoning
All engine exhaust contains
carbon monoxide, a deadly
gas. Breathing carbon
monoxide can cause
headaches, dizziness,
drowsiness, nausea, confusion
and eventually death.
Carbon monoxide is a colorless, odorless, tasteless gas
which may be present even if you DO NOT see or smell
any engine exhaust. Deadly levels of carbon monoxide can
collect rapidly and you can quickly be overcome and
unable to save yourself. Also, deadly levels of carbon
monoxide can linger for hours or days in enclosed or
poorly-ventilated areas. If you experience any symptoms of
carbon monoxide poisoning, leave the area immediately,
get fresh air, and SEEK MEDICAL TREATMENT.
To prevent serious injury or death from carbon monoxide:
• NEVER run engine indoors. Even if you try to
ventilate engine exhaust with fans or open windows
and doors, carbon monoxide can rapidly reach
dangerous levels.
• NEVER run engine in poorly-ventilated or partially
enclosed areas such as barns, garages,
basements, carports, under dwellings, or in pits.
• NEVER run engine outdoors where engine exhaust
can be drawn into a building through openings such
as windows and doors.
B. Avoid Gasoline Fires
Gasoline (fuel) vapors are highly flammable
and can explode. Fuel vapors can spread
and be ignited by a spark or flame many feet
away from engine. To prevent injury or death
from fuel fires, follow these instructions:
• NEVER store engine with fuel in fuel
tank inside a building with potential
sources of ignition such as hot water and space
heaters, clothes dryers, electric motors, etc.
• NEVER remove fuel fill cap or add fuel when engine
is running.
• NEVER start or operate the engine with the fuel fill
cap removed.
• Allow engine to cool before refueling.
• NEVER fill fuel tank indoors. Fill fuel tank outdoors
in a well-ventilated area.
• DO NOT smoke while refueling tank.
• Use only an approved red GASOLINE container
to store and dispense fuel. TecumsehPower
Company recommends purchasing gasoline in
containers with a capacity of 2.5 gallons or less.
Small containers are easier to handle and help
eliminate spillage during refueling.
• DO NOT pour fuel from engine or siphon fuel by
mouth. T o empty the fuel t ank, see "I. Draining Fuel"
instructions on page 17.
C. Adult Supervision of Operation, Refueling
and Maintenance
The manufacturer of the equipment may provide
information about who is allowed to use this engine (see
equipment manufacturer’s manual). NOT everyone who is
allowed to use this engine is capable of safely and
responsibly operating, maintaining and/or fueling it.
TecumsehPower Company recommends the following:
• An adult should fuel this engine. NEVER allow
children to refuel this engine. See "G. Filling Fuel
Tank" instructions on page 7.
• An adult should perform maintenance on this
engine. See "VII. Maintenance" instructions on
page 12. Only allow children to perform maintenance if an adult has determined they are
experienced and capable of such operation.
• An adult should start the engine. See "G. Avoid
Accidental Starts" instructions on page 2. Only
allow children to start the engine if an adult has
determined they are experienced and capable of
such operation.
• To avoid unsupervised operation of the engine,
especially by children, NEVER leave it unattended
when it is running. Remove ignition key, if equipped.
D. Stay Away from Rotating Parts
NEVER operate the engine with an unguarded engine shaft
or flywheel. See Figures 1 and 2 on page 2.
The equipment manufacturer may
attach a sprocket and chain or pulley
and belt to the engine shaft. If these
parts are NOT properly guarded, or if
you are NOT sure whether they are
properly guarded, DO NOT use your
engine; contact the equipment
manufacturer. Hands, feet, hair,
jewelry, clothing, etc.,can become
entangled in rotating parts, leading to
serious injury or death. To avoid
serious injury or death, be sure the
flywheel guard is in place. See
Figures 1 and 2 on page 2.
181-719-14 Four-Cycle Engine • Horizontal Crankshaft • Air-Cooled Page 1
E. DO NOT Modify Engine
!
To avoid serious injury or death, DO NOT modify en gine in
any way. Tampering with the governor setting can lead to a
runaway engine and cause it to operate at unsafe speeds.
NEVER tamper with factory setting of engine governor.
!
WARNING
Use of this engine on fun-carts, go-kar ts, o r mini-bikes
can result in serious injury or death. TecumsehPower
Company manufactures the Power Sport line of engines
for use in such applications. Consult your local Authorized
TecumsehPower Servicing Dealer, call 1-800-558-5402,
or visit www.TecumsehPower .com for additional information.
F. Avoid Burns and Fire from Hot Surfaces
The muffler and other engine parts become
extremely hot during operation and remain
hot after the engine has stopped.
• To avoid severe burns on contact,
STAY AWAY from hot areas of
engine. DO NOT operate the engine
without the muffler guard in place,
if equipped.
• To reduce the risk of fire keep all materials that can
burn, including grass and leaves, away from muffler
and rest of engine. DO NOT operate, idle or park
engine powered equipment in long dry grass or
other dry ground cover.
Figure 1. DO NOT Use Without Engine Shaft Guard
1
1. Muffler Guard
2. F lyw h ee l Gu ard
2
G. Avoid Accidental Starts
To prevent accidental starting when working on equipment
always:
• Carefully disconnect spark plug wire and keep it
away from spark plug. See Figures 3 and 4.
• Keep the disconnected spark plug wire
securely away from metal par ts where arcing
could occur.
• Carefully attach the spark plug wire to the
grounding post, if provided.
• Disconnect battery at negative terminal first, if
engine is equipped with a DC electric starter.
• Turn all engine switches to “OFF” position.
• Remove ignition key, if provided.
H. Use Hearing Protection
Engine noise may cause hearing damage. Always wear
hearing protection when operating an engine.
Figure 2. Typical Engine Guard Locations
Figure 3. Disconnecting/Connecting Spar k Plug
Figure 4. Typical Spark Plug Connection
Page 2 Four-Cycle Engine • Horizontal Crankshaft • Air-Cooled 181-719-14
II. How to Get Service
For engine adjustments, repairs or warranty service
NOT covered in this manual, contact your nearest
Authorized TecumsehPower Servicing Dealer. Find them
on our website at www.TecumsehPower.com or call
TecumsehPower Company at 1-800-558-5402 for
additional information.
Visit our web site at www.TecumsehPower.com
Register Your TecumsehPower Engine
Maintenance Tips
On-Line Store
Locate your nearest TecumsehPower Servicing Dealer
LOG ON!
A. Engine Identification Decal
A sample engine identification decal is located in the next
column and indicates the engine’s model number,
specification and date of manufacture (DOM). See Figure 5.
NOTES
Please look at the decal on your engine.
Fill in the engine information in the spaces provided for
future reference.
The engine identification decal also includes engine life
specifications for the emissions-related useful life period of
your engine. This period relates to the emission compliance
life as certified by EPA and/or CARB.
• OH models are designated as “C” 250 hours,
“B” 500 hours and “A” 1000 hours.
TECUMSEHPOWER COMPANY
THIS ENGINE MEETS 1995-2005 CALIF & US EPA
PHI APPLICABLE EMISSION REGULATIONS FOR SI
SORE ENGINES
LV195EA
361540D
4TPXS.1951BB 195
ENGINE
MODEL:
SPEC:
DOM:
Figure 5. Engine Identificati on D ec a l
2083
EM
04015AA0001
B. Technician’s Handbook
If you have a general understanding of internal combustion
engines and wish to repair and service your engine and/or
engine emission control systems yourself, a Technician’s
Handbook is available from your Authorized
TecumsehPower Servicing Dealer. See Figure 6. This
handbook covers repairs and adjustments not covered
within this Operator’s Manual, and it is intended for
individuals who have had adequate training, experience
and who practice proper tool usage. Service procedures
should be clearly understood and practiced when servicing
TecumsehPower engines.
• Order as part #695244A or #740043 for OH models.
TecumsehPower Company manufactures and is
responsible only for the engine used on this power
equipment. If repair or service is needed for anything other
than the engine, contact the service source recommended
by the equipment manufacturer.
Figure 6. Technician’s Handbook
181-719-14 Four-Cycle Engine • Horizontal Crankshaft • Air-Cooled Page 3
III. Oil and Fuel Specifications
32 F
O
A. Oil
To operate engine you need to use a clean, high quality,
detergent oil. For recommended engine oil, see Table 1. In
addition, you need to be sure the oil sump contains the
correct amount of oil to operate properly.
NOTES
The oil sump capacity for OH318EA models is 26 ounces
or 1-5/8 U.S. Pints (.78 liters).
Be sure original container is marked A.P.I. Service “SL/SJ”.
-30 C
Table 1. Recommended Oil
TecumsehPower Recommended Oil Usage
Multi Grade
TecumsehPower Part No.
730226A or SAE 5W30 or SAE 10W
TecumsehPower
Synthetic Part No.
730263 or SAE 0W30
O
O
-20 C
0F
O
-10 C
-20 F
O
Straight Grade
TecumsehPower Part No.
730225A or SAE 30W
O
20 F
O
32 FO32 F
O
0C
O
10 C
O
60 F
20 C
80 F
O
O
O
O
100 F
O
40 C
O
30 C
O
40 F
Using multigrade oil above 32°F (0°C) will increase oil
consumption. SAE 10W40 is NOT recommended.
Special-formulated oils are available at your Authorize d
TecumsehPower Servicing Dealer.
B. Fuel
Use unleaded regular, unleaded premium or reformulated
automotive fuel only. You may use gasoline containing the
components identified in Table 2.
• DO NOT use leaded fuel.
• Fuel must be fresh and clean. NEVER use fuel left
over from last season or stored for long periods.
• NEVER mix oil with fuel.
• DO NOT use fuel containing Methanol (Wood Alcohol).
CAUTION
TecumsehPower engines. Alternative fuels with high
alcohol content can cause hard starting, poor engine
performance, and may cause internal engine damage.
Damage and/or performance problems that occur fro m use
of fuels, other than those listed in the Operator’s Manuals
will not be considered warranty.
The use of alternative fuels such as E85
or E20 are NOT recommended for use in
NOTE
Ta bl e 2. Re co mme n ded Fuel
Fuel Component Percentage
Ethanol 10%
Grain Alcohol (“Gasohol”) 10%
MTBE (Methyl Tertiary Butyl Ether) 15%
ETBE (Ethyl Tertiary Butyl Ether) 15%
Fill Between “FULL”
FULL
and “ADD” Marks
OK
ADD
IV. Before Starting Your Engine
Figure 7. Engine Oil Level
A. Checking Oil Level
To avoid engine damage, it is important to:
• Check oil level before each use and every 5
operating hours when engine is warm. Check oil
level more frequently during engine break-in.
• Keep oil level between “FULL” and “ADD” marks on
dipstick. See Figure 7.
• Be sure oil fill cap is tightened securely.
NOTES
DO NOT overfill oil filler. Doing so may result in oil
carry-over to the air cleaner and equipment and cause
malfunction or damage.
DO NOT allow oil level to fall below the “ADD” mark on dipstick.
Doing so may result in equipment malfunction or damage.
Contact your Authorized TecumsehPower Servicing Dealer
for TecumsehPower Oil.
Page 4 Four-Cycle Engine • Horizontal Crankshaft • Air-Cooled 181-719-14
B. Filling Oil Sump
!
I. Oil Fill Cap/Dipstick
If your engine has an oil fill cap/dipstick go to step 1. If your
engine does NOT have an oil fill cap/dipstick, see "II. Oil Fill
Cap/Plug" instructions below.
1. Be sure engine is upright and level.
2. Unscrew oil fill cap/dipstick from oil filler tube and wipe
dipstick clean. See Figure 8.
3. Screw oil fill cap/dipstick back into oil filler tube. Tighten
securely.
4. Unscrew and remove oil fill cap/dipstick from oil filler
tube. Note oil level. If oil reading on dipstick is below
“ADD” mark, slowly add oil to reach “FULL” level.
See Figure 7 on page 4. Afterward, continue reading
instructions below.
5. Screw oil fill cap/dipstick back into oil filler tube.
Tighten securely.
6. Wipe away any spilled oil.
NOTE
To change oil for engines with an oil fill cap/dipstick, see
"A. Checking and Changing Oil” instructions on page 13.
II. Oil Fill Cap/Plug
If your engine does NOT have an oil fill cap/dipstick, go to
step 1. If your engine has an oil fill cap/dipstick, see
"I. Oil Fill Cap/Dipstick" instructions above.
1. Be sure engine is upright and level.
2. Clean area around oil fill cap/plug. See Figure 9.
3. Unscrew oil fill cap/plug.
4. Add oil to overflow point, making sure to avoid spilling.
5. Screw oil fill cap/plug back into oil fill hole.
Tighten secure ly.
6. Wipe away any spilled oil.
3
2
1
1. Carburetor
2. Air Cleaner
3. Muffler
4. Muffler Guard
5. Oil Fill Cap
6. Spark Plug Cap
7. Fuel Fi ll Cap
8. Starter Cord Handle
Figure 8. Engine Components
547
6
8
NOTE
To change oil for engines with an oil fill cap/plug, see
“A. Checking and Changing Oil” instructions on page 13.
Figure 9. Oil Fill Locations
181-719-14 Four-Cycle Engine • Horizontal Crankshaft • Air-Cooled Page 5
C. Engine Stop Switch
Climate Gu
ar
d
RUN
CH
O
KE
!
Climate Guard
!
Some engines are equipped with an optional Stop Switch.
This rocker switch is used to shut off the ignition that
supplies the spark plug with power. Pressing the "OFF"
position will turn the engine off when it is running. This
switch must be in the “ON” position or the engine will not
start. See Figure 10.
D. Low Oil Shutdown Switch
Some engines are equipped with an optional Low Oil
Shutdown Switch. This is a lighted rocker switch that is
connected to a float switch in the engine crankcase. When
oil level drops below a predetermined level, the float switch
cuts off current to the spark plug and the engine stops
running. Oil must be added to the engine to bring the oil to
the proper level before the engine will start. If an attempt is
made to start the engine before oil is added, the switch will
flash as the engine rotates, and the engine will not start.
See Figure 11.
Pressing the “OFF” position of the Shutdown Switch while
the engine is running, will turn the engine off. The engine
will not start with the switch in the “OFF” position.
E. Low Oil Shutdown Light
Some engines are equipped with an optional Low Oil
Shutdown System that includes a light but does not inclu de
a rocker switch. The float switch in this system will shut the
engine off while it is running if the oil level in the crankcase
falls below a predetermined level. Oil must be added to the
engine to bring the oil to the proper level before the engine
will start. If an attempt is made to start the engine before oil
is added, the light will flash as the engine rotates, and the
engine will not start. See Figure 11.
1
2
1. “ON” Position
2. “OFF” Position
Figure 10. Engine Stop Switch
1
2
3
1. “ON” Position
2. “OFF” Position
3. Lighted Switch
Figure 11. Low Oil Shutdown Switch
F. Low Oil Shutdown System
Some engines are equipped with an optional Low Oil
Shutdown System that does not have a rocker switch or a
light. The float switch in this system will shut the engine off
while it is running if the oil level in the crankcase falls below
a predetermined level. Oil must be added to the engine to
bring the oil to the proper level before the engine will start.
Page 6 Four-Cycle Engine • Horizontal Crankshaft • Air-Cooled 181-719-14
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