Tecumseh OV691EA Installation Manual
OV691EA/OV691EP (TVT691/VTX691)
Four-Cycle T win Cylinder Engine • V ertical Crankshaft • Air-Cooled
Ta ble 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.........................................................................6
VI. Stopping Your Engine and Short-Term Storage................................8
VII. Maintenance.....................................................................................8
VIII. Transporting Your Engine...............................................................12
IX. Storing Your Engine........................................................................12
X. Preventing Forest, Brush and Grass Fires.....................................14
XI. Maintenance Intervals....................................................................14
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!
181-1273-14
(English) 7/01/08
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 Twin Cylinder Engine • Vertical Crankshaft • Air-Cooled 181-1273-14
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 13.
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 "C. Filling Fuel
Tank" instructions on page 5.
• An adult should perform maintenance on this
engine. See "VII. Maintenance" instructions on
page 8. 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 Figure 1 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 Figure
1 on page 2.
181-1273-14 Four-Cycle Twin Cylinder Engine • Vertical 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, or 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.
Flywheel Guard
Figure 1. Typical Flywheel Guard Location
NOTE
The Twin Cylinder Engines have two spark plug
connections.
G. Avoid Accidental Starts
NOTE
The Twin Cylinder Engines have two spark plug
connections.
To prevent accidental starting when working on equipment
always:
• Carefully disconnect spark plug wire and keep it
away from spark plug. See Figures 2 and 3.
• 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. Disconnecting/Connecting Spar k Plug
Figure 3. Typical Spark Plug Grounding Post
Page 2 Four-Cycle Twin Cylinder Engine • Vertical Crankshaft • Air-Cooled 181-1273-14
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 4.
NOTES
Please look at the decal on your engine.
Fill in the engine information in the spaces provided for
future reference.
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 4. Engine Identification Decal
2083
EM
04015AA0001
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.
• OV models are designated as “C” 250 hours, “B”
500 hours and “A” 1,000 hours.
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 5. 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 #696325 for V-Twin 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 5. Technician’s Handbook
181-1273-14 Four-Cycle Twin Cylinder Engine • Vertical 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 (including oil filter) is 80 ounces or 5
U.S. Pints (2.36 liters).
The oil sump capacity (without oil filter) is 72 ounces or
4-1/2 U.S. Pints (2.12 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
0F
-20 F
O
O
-20 C
-10 C
Straight Grade
TecumsehPower Part No.
730225A or SAE 30W
O
20 F
O
32 FO32 F
0C
O
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
Table 2. Recommended Fuel
Fuel Component Percentage
Ethanol 10%
Grain Alcohol (“Gasohol”) 10%
MTBE (Methyl Tertiary Butyl Ether) 15%
ETBE (Ethyl Tertiary Butyl Ether) 15%
FULL
Fill Between “FULL”
and “ADD” Marks
OK
ADD
IV. Before Starting Your Engine
Figure 6. 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
DO NOT overfill oil filler. Doing so may result in oil
carry-over to the air cleaner and equipment and cause
malfunction or damage.
level more frequently during engine break-in.
• Keep oil level between “FULL” and “ADD” marks on
oil fill cap/dipstick or to point of overflow on engines
with an oil fill cap/plug. See Figure 6.
• Be sure oil fill cap/dipstick or oil fill cap/plug is
tightened securely.
DO NOT allow oil level to fall below the “ADD” mark on oil fill
cap/dipstick. Doing so may result in equipment malfunction
or damage.
Contact your Authorized TecumsehPower Servicing Dealer
for Tecu ms eh Po we r Oil.
Some engines are equipped with an oil fill cap/dipstick or oil
fill cap/plug (see equipment manufacturer’s instructions). T o
change the oil on your engine, see “A. Changing Oil”
instructions on page 8.
Page 4 Four-Cycle Twin Cylinder Engine • Vertical Crankshaft • Air-Cooled 181-1273-14
NOTES
B. Filling Oil Sump
1. Be sure engine is upright and level.
2. Unscrew oil fill cap/dipstick from oil filler tube and wipe dipstick clean. See Figure 7.
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 6 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.
C. Filling Fuel Tank
WARNING
engine. 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:
1. Stop engine and allow it to cool before refueling.
2. Be sure engine is outdoors and in a well-ventilated area.
3. Clean area around fuel fill cap and remove fuel fill cap.
For recommended fuel, see Table 2 and "III. Oil and Fuel
Specifications" instructions on page 4. Afterw ard, continue
reading instructions below.
4. Using an approved red GASOLINE container, add fuel slowly, being careful to avoid spilling. DO NOT overfill fuel tank. Leave space in the tank to allow fuel to expand without overflowing.
5. Replace fuel fill cap securely and wipe up spilled fuel before starting engine. If fuel is spilled DO NOT start engine. Move machine away from area of spillage. Avoid creating any source of ignition until fuel vapors are gone.
An adult should fuel this engine.
NEVER allow children to refuel this
NOTE
The Tw in Cylinder Engines have two spark plug
connections.
23
1
1. Oil Drain Plug
2. Oil Fill Cap/Dipstick
3. Air Intake Screen
4. Grounding Post
5. Spark Plug Cap
6. Spark Plug Wire
Figure 7. Engine with Oil Fill Cap/Dipstick
456
181-1273-14 Four-Cycle Twin Cylinder Engine • Vertical Crankshaft • Air-Cooled Page 5
V. Starting Your Engine
WARNING
allow children to start engine if an adult has determined
they are experienced and capable of such operation.
WARNING
manual, contact your Authorized TecumsehPower
Servicing Dealer. To avoid serious burn injuries or da mage
to your engine, DO NOT attempt to start or troubleshoot
this engine in any other way. For example:
• DO NOT use starting fluid.
• DO NOT spray flammable vapors into carburetor or
onto air cleaner.
• DO NOT put flammable liquids into carburetor or
onto air cleaner.
• DO NOT operate engine or pull on starter rope with
spark plug removed. Fuel can spray from spark plug
hole and ignite.
To avoid serious injury or death, an
adult should start this engine. Only
If you are unable to start this engine
after following instructions in this
A. Combined Speed and Choke Control
1. T o avoid carbon monoxid e poisoning, be sure e ngine is outdoors in a well-ventilated area.
2. Move combined control to “CHOKE” or “START” position (see equipment manufacturer’s instructions). See Figures 8 and 9.
NOTE
If restarting a warm engine after a short shutdown, move
combined control to “F AST” instead of “CHOKE” or “ST ART”
position. See Figures 8 and 9.
3. Push starter button or turn ignition switch key (see
equipment manufacturer’s instructions) to start engine.
NOTES
DO NOT operate an electric starter for more than 5 seconds
each attempt.
If engine fails to start after 3 attempts repeat steps 2 thru 3.
Figure 8. Combined Speed and Choke Control
STOP
STOP SLOW RUN FAST CHOKE
Figure 9. Typical Engine Symbols
4. When engine starts: a. Release starter button or ignition switch key. b. Next, move combined control to “FAST” position. c. Finally, move combined control to desired speed in
“RUN” range.
NOTES
If engine starts, but falters when combined contr ol is moved
to “FAST” position:
a. Momentarily move combined control back to
“CHOKE” position.
b. Next, move combined control to “FAST” position.
c. Finally, move combined control to desired speed in
“RUN” range.
If engine dies after combined control is moved to “FAST”
position, repeat steps 2 thru 4 to restart engine.
5. If engine fires but does NOT continue to run, move combined control to “FAST” position and th en start engine.
6. If engine fails to start after 3 attempts with combined control in “FAST” position, move combined control to “CHOKE” position and push button or turn key to start engine again.
7. If engine does NOT start after following steps 1 thru 6, contact your Authorized Tecumseh Servicing Dealer. DO NOT attempt to start or troubleshoot this engine in any other way.
Page 6 Four-Cycle Twin Cylinder Engine • Vertical Crankshaft • Air-Cooled 181-1273-14
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