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
Caution is used to indicate the presence of a hazard that will or can cause minor personal injury 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
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.
CAUTION
Electrical Shock can cause injury.
Do not touch wires while engine is
running.
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.
Electrical Shock!
Never touch electrical wires or
components while the engine is
running. They can be sources of
electrical shock.
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 .
WARNINGWARNING
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.
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, air-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 cam and valve design, and pressure lubrication provide maximum power , torque, and
reliability under all operating conditions. The overhead cam design also provides extremely quiet operation.
• 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
Air Cleaner Cover
Blower
Housing
Dipstick
Cooling
Shrouds
Oil Fill
Grass
Screen
Figure 1. T ypical Triad OHC Engine.
Electric
Starter
Oil Drain Plug
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. Select the viscosity based on the air
temperature at the time of operation as shown in the
following table.
Oil Filter
Oil Drain Plug
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
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.
4
*
Figure 3. Oil Container Logo.
Refer to “Maintenance Instructions” beginning on
page 7 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 cont ainer 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.
Do not use gasoline left over from the previous season,
to minimize gum deposits in 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 T ype
For best results use only clean, fresh, unleaded
gasoline with a 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 and reduces harmful
exhaust emissions. Leaded gasoline is not
recommended and must not be used in OHC engines.
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.
IMPORTANT ENGINE INFORMATION
THIS ENGINE MEETS U.S. EPA 2005 AND
CALIFORNIA 2006 EMISSION REGS FOR SI
SMALL OFF-ROAD ENGINES
FAMILY
DISPL. (CC)
MODEL NO.
SPEC. NO.
N11236
SERIAL NO.
OEM PROD. NO.
EMISSION COMPLIANCE PERIOD:
EPA:CARB:
THIS ENGINE IS CERTIFIED TO OPERATE
ON:
REFER TO OWNER'S MANUAL FOR
SAFETY, MAINTENANCE SPECS AND
ADJUSTMENTS.
FOR SALES/SERVICE IN US/CANADA, CALL:
1-800-544-2444
www.kohlerengines.com
KOHLER CO. KOHLER, WISCONSIN USA
Figure 4. Engine Identification Label.
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.
Emission Compliance Period (Hours)
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.
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 shrouding. Include letter suffixes,
if there are any .
Record your engine identification numbers on the
identification label (Figure 4) for future reference.
EP A
CARB
Category C
250 Hours
Moderate
125 Hours
Category B
500 Hours
Intermediate
250 Hours
Category A
1000 Hours
Extended
500 Hours
Refer to certification label for engine displacement.
Exhaust Emission Control System for models TH520,
TH575, TH650 is EM.
5
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