To ensure safe operations please read the following statements and understand their meaning.
Also refer to your equipment owner's manual for other important safety information. This manual
contains safety precautions which are explained below . Please read carefully.
WARNING
Warning is used to indicate the presence of a hazard that can cause severe personal injury, death,
or substantial property damage if the warning is ignored.
Caution is used to indicate the presence of a hazard that will or can cause minor personal injury
CAUTION
or property damage if the caution is ignored.
NOTE
Note is used to notify people of installation, operation, or maintenance information that is important
but not hazard-related.
For Y our Safety!
These precautions should be followed at all times. Failure to follow these precautions could result
in injury to yourself and others.
WARNING
Explosive Fuel can cause fires and
severe burns.
Stop engine before filling fuel tank.
Explosive Fuel!
Gasoline is extremely flammable
and its vapors can explode if
ignited. Store gasoline only in
approved containers, in well
ventilated, unoccupied buildings,
away from sparks or flames. Do not
fill the fuel tank while the engine is
hot or running, since spilled fuel
could ignite if it comes in contact
with hot parts or sparks from
ignition. Do not start the engine near
spilled fuel. Never use gasoline as a
cleaning agent.
WARNING
Hot liquid can cause severe burns.
Do not loosen radiator cap while
engine is operating or warm to the
touch.
Hot Liquid!
The liquid coolant can get extremely
hot from operation. T urning the
radiator cap when the engine is hot
can allow steam and scalding liquid
to blow out and burn you severely .
Shut off machine. Only remove
radiator cap when cool enough to
touch with bare hands. Slowly
loosen cap to first stop to relieve
pressure before removing
completely .
WARNING
Hot Parts can cause severe burns.
Do not touch engine while operating
or just after stopping.
Hot Parts!
Engine components can get
extremely hot from operation. To
prevent severe burns, do not touch
these areas while the engine is
running, or immediately after it is
turned off. Never operate the engine
with heat shields or guards
removed.
California
Proposition 65 Warning
Engine exhaust from this product
contains chemicals known to the
State of California to cause
cancer, birth defect s, or other
reproductive harm.
2
Safety Precautions (Cont.)
WARNING
Accidental Starts can cause severe
injury or death.
Disconnect and ground spark plug
leads before servicing.
Accidental St arts!
Disabling engine. Accidental
starting can cause severe injury
or death. Before working on the
engine or equipment, disable the
engine as follows: 1) Disconnect the
spark plug lead(s). 2) Disconnect
negative (-) battery cable from
battery .
CAUTION
Electrical Shock can cause injury.
Do not touch wires while engine is
running.
Electrical Shock!
Never touch electrical wires or
components while the engine is
running. They can be sources of
electrical shock.
WARNING
Carbon Monoxide can cause
severe nausea, fainting or death.
Do not operate engine in closed or
confined area.
Lethal Exhaust Gases!
Engine exhaust gases contain
poisonous carbon monoxide.
Carbon monoxide is odorless,
colorless, and can cause death if
inhaled. Avoid inhaling exhaust
fumes, and never run the engine in
a closed building or confined area.
WARNING
Rotating Parts can cause severe
injury.
Stay away while engine is in
operation.
Rotating Parts!
Keep hands, feet, hair, and clothing
away from all moving parts to
prevent injury. Never operate the
engine with covers, shrouds, or
guards removed.
WARNING
Explosive Gas can cause fires and
severe acid burns.
Charge battery only in a well
ventilated area. Keep sources of
ignition away.
Explosive Gas!
Batteries produce explosive
hydrogen gas while being charged.
To prevent a fire or explosion,
charge batteries only in well
ventilated areas. Keep sparks, open
flames, and other sources of ignition
away from the battery at all times.
Keep batteries out of the reach of
children. Remove all jewelry when
servicing batteries.
Before disconnecting the negative
(-) ground cable, make sure all
switches are OFF. If ON, a spark will
occur at the ground cable terminal
which could cause an explosion if
hydrogen gas or gasoline vapors
are present.
Congratulations – You have selected a fine four-cycle, twin cylinder, liquid-cooled engine. Kohler designs long
life strength and on-the-job durability into each engine...making a Kohler engine dependable...dependability you
can count on. Here are some reasons why:
• Efficient overhead valve design, and pressure lubrication provide maximum power , torque, and reliability
under all operating conditions.
• Dependable, maintenance free electronic ignition ensures fast, easy starts time after time.
• Kohler engines are easy to service. All routine service areas (like the dip stick and oil fill, air cleaner, spark
plugs, and carburetor) are easily and quickly accessible.
• Parts subject to the most wear and tear (like the cylinder liner and camshaft) are made from precision
formulated cast iron.
• Every Kohler engine is backed by a worldwide network of over 10,000 distributors and dealers. Service
support is just a phone call away . Call 1-800-544-2444 (U.S. & Canada) for Sales & Service assist ance.
To keep your engine in top operating condition, follow the maintenance procedures in this manual.
3
Engine
Identification Label
Oil Fill/
Dipstick
Upper Blower Housing and
Air Intake Screen Assembly
Retaining
Strap
Electric
Starter
Spark Plug
Valve Cover with
Integral Breather
Figure 1. T ypical Kohler Aegis® Vertical Shaf t Engine.
Oil Recommendations
Using the proper type and weight of oil in the
crankcase is extremely important. So is checking oil
daily and changing oil regularly . Failure to use the
correct oil, or using dirty oil, causes premature engine
wear and failure.
Oil T ype
Use high quality detergent oil of API (American
Petroleum Institute) service class SG, SH, SJ or
higher. Synthetic oils may be used. Select the viscosity
based on the air temperature at the time of operation as
shown in the following table.
Fuel
Pump
Oil Filter
Spark
Plug
hours using standard petroleum based oil
before switching to synthetic oil.
A logo or symbol on oil cont ainers identifies the API
service class and SAE viscosity grade. See Figure 3.
**
*Use of synthetic oil having 5W-20 or 5W-30 rating is acceptable,
up to 4°C (40°F).
**Synthetic oils will provide better starting in extreme cold below
23°C (-10°F).
Figure 2. Viscosity Grades Table.
NOTE: Using other than service class SG, SH, SJ or
higher oil or extending oil change intervals
longer than recommended can cause engine
damage.
NOTE: Synthetic oils meeting the listed classifications
may be used with oil changes performed at
the recommended intervals. However to allow
piston rings to properly seat, a new or rebuilt
engine should be operated for at least 50
*
Figure 3. Oil Container Logo.
Refer to “Maintenance Instructions” beginning on
page 8 for detailed oil check, oil change, and oil
filter change procedures.
Fuel Recommendations
WARNING: Explosive Fuel!
Gasoline is extremely flammable and its vapors can
explode if ignited. Store gasoline only in approved
containers, in well ventilated, unoccupied buildings,
away from sparks or flames. Do not fill the fuel tank
while the engine is hot or running, since spilled fuel
could ignite if it comes in contact with hot parts or
sparks from ignition. Do not start the engine near
spilled fuel. Never use gasoline as a cleaning agent.
General Recommendations
Purchase gasoline in small quantities and store in
clean, approved containers. A container with a capacity
of 2 gallons or less with a pouring spout is
recommended. Such a container is easier to handle
and helps eliminate spillage during refueling.
4
Do not use gasoline left over from the previous season,
to minimize gum deposits in your fuel system and to
ensure easy starting.
Do not add oil to the gasoline. Do not overfill the fuel
tank. Leave room for the fuel to expand.
Fuel Type
For best results use only clean, fresh, unleaded
gasoline with the pump sticker octane rating of 87 or
higher. In countries using the Research method, it
should be 90 octane minimum.
Unleaded gasoline is recommended as it leaves less
combustion chamber deposits. Leaded gasoline may
be used in areas where unleaded is not available and
exhaust emissions are not regulated. Be aware
however, that the cylinder heads may require more
frequent service.
Gasoline/Alcohol blends
Gasohol (up to 10% ethyl alcohol, 90% unleaded
gasoline by volume) is approved as a fuel for Kohler
engines. Other gasoline/alcohol blends are not
approved.
Record your engine identification numbers on the
identification label (Figure 4) for future reference.
IMPORTANT ENGINE INFORMATION
THIS ENGINE MEETS U.S. EPA AND CA 2005
AND LATER AND EC STAGE II (SN:4) EMISSION
REGS FOR SI SMALL OFF–ROAD ENGINES
FAMILY
TYPE APP
DISPL. (CC)
MODEL NO.
N11236
SPEC. NO.
SERIAL NO.
BUILD DA TE
OEM PROD. NO.
EMISSION COMPLIANCE PERIOD:
EPA:CARB:
CERTIFIED ON:
REFER TO OWNER'S MANUAL FOR HP RATING,
SAFETY, MAINTENANCE AND ADJUSTMENTS
1-800-544-2444 www.kohlerengines.com
KOHLER CO. KOHLER, WISCONSIN USA
Figure 4. Engine Identification Label.
Gasoline/Ether blends
Methyl Tertiary Butyl Ether (MTBE) and unleaded
gasoline blends (up to a maximum of 15% MTBE by
volume) are approved as a fuel for Kohler engines.
Other gasoline/ether blends are not approved.
Coolant Recommendations
Use equal parts of ethylene glycol (anti-freeze) and
water only . Distilled or deionized water is
recommended, especially in areas where the water
contains a high mineral content. Propylene glycol
based anti-freeze is not recommended.
This mixture will provide protection from -37°C (-34°F)
to 108°C (226°F). For protection and use outside the
indicated temperature limits, follow the anti-freeze
manufacturers instructions on the container , but do not
exceed 70% anti-freeze.
DO NOT use anti-freeze with stop-leak additive(s), or
put any other additives in the cooling system.
Engine Identification Numbers
When ordering parts, or in any communication
involving an engine, always give the Model,Specification, and Serial Numbers of the engine.
The engine identification numbers appear on a decal
affixed to the engine blower housing. Include letter
suffixes, if there are any.
The Emission Compliance Period referred to on the
Emission Control or Air Index label indicates the
number of operating hours for which the engine has
been shown to meet Federal and CARB emission
requirements. The following table provides the Engine
Compliance Period (in hours) associated with the
category descriptor found on the certification label.
EPA
CARB
Category C
250 Hours
Moderate
125 Hours
Category B
500 Hours
Intermediate
250 Hours
Category A
1000 Hours
Extended
500 Hours
Emission Compliance Period (Hours)
Refer to certification label for engine displacement.
Exhaust Emission Control System for models L V 625,
L V675, and LV680 is EM.
Model Designation
Model L V625 for example: L designates liquid cooled,
V designates vertical crankshaft, and 625 is the model
designation. A letter suffix designates a specific
version as follows:
SuffixDesignates
SElectric Start
5
Operating Instructions
Also read the operating instructions of the equipment this engine powers.
Pre-Start Checklist
• Check oil level. Add oil if low. Do not overfill.
• Check coolant level. Add coolant if low.
• Check fuel level. Add fuel if low.
• Check radiator, cooling air int ake areas and
external surfaces of engine. Make sure they are
clean and unobstructed.
• Check that the air cleaner components and all
shrouds, equipment covers, and guards are in
place and securely fastened.
• Check that any clutches or transmissions are
disengaged or placed in neutral. This is especially
important on equipment with hydrostatic drive. The
shift lever must be exactly in neutral to prevent
resistance which could keep the engine from
starting.
WARNING: Lethal Exhaust Gases!
Engine exhaust gases contain poisonous carbon
monoxide. Carbon monoxide is odorless, colorless,
and can cause death if inhaled. Avoid inhaling exhaust
fumes, and never run the engine in a closed building or
confined area.
Cold Weather Starting Hints
1. The cooling system must be filled with coolant
capable of providing proper protection against
freezing at the lowest temperature expected (see
‘‘Coolant Recommendations’’ on page 5).
Starting
1. Place the throttle control midway between the
“slow” and “fast” positions. Place the choke
control into the “on” position.
2. St art the engine by activating the key switch.
Release the switch as soon as the engine starts.
NOTE: Do not crank the engine continuously for
more than 10 seconds at a time. If the
engine does not start, allow a 60 second
cool down period between starting
attempts. Failure to follow these
guidelines can burn out the starter motor .
NOTE: Upon st art-up, a metallic ticking may
occur. This is caused by hydraulic lifter
leakdown during storage. Run the engine
for 5 minutes. The noise will normally
cease in the first minute. If noise
continues, run the engine at mid-throttle
for 20 minutes. If noise persists, take the
engine to your local Kohler Service outlet.
If the starter does not turn the engine over , shut
off starter immediately. Do not make further
attempts to start the engine until the condition is
corrected. Do not jump start using another battery
(refer to “Battery” on page 7). See your Kohler
Engine Service Dealer for trouble analysis.
3. For a Cold Engine – Gradually return the choke
control to the “off” position after the engine starts
and warms up.
2. Be sure to use the proper oil for the temperature
expected. See Figure 2 on page 4.
3. Declutch all possible external loads.
4. A warm battery has much more st arting capacity
than a cold battery .
5. Use fresh winter grade fuel. NOTE: Winter grade
gasoline has higher volatility to improve starting.
Do not use gasoline left over from summer.
6
The engine/equipment may be operated during
the warm up period, but it may be necessary to
leave the choke partially on until the engine warms
up.
4. For a Warm Engine – Return choke to “off”
position as soon as engine starts.
Stopping
1. Remove the load by disengaging all PTO
attachments.
2. Position the throttle control somewhere between
half and full throttle; then stop the engine.
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