Kohler Command 6 HP User manual

1
COMMAND 6 HP
HORIZONTAL CRANKSHAFT
OWNER'S MANUAL

2
Safety Precautions
To insure 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 ha ard 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 ha ard 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 ha ard-related.
For Your Safety!
These precautions should be followed at all times. Failure to follow these precautions could result in
injury to yourself and others.
Engine exhaust from this product
contains chemicals known to the
State of California to cause cancer
birth defects or other reproductive
harm.
California
Proposition 65 Warning
Explosive Fuel can cause fires and
severe burns.
Stop engine before filling fuel tank.
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.
Rotating Parts can cause severe
injury.
Stay away while engine is in
operation.
WARNING
Rotatin 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.
Hot Parts can cause severe burns.
Do not touch engine while operating
or just after stopping.
WARNING
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.
Electrical Shock can cause injury.
Do not touch wires while engine is
running.
CAUTION
Electrical Shock!
Never touch electrical wires or
components while the engine is
running. They can be sources of
electrical shock.

3
Safety Precautions (Cont.)
Accidental Starts can cause severe
injury or death.
Disconnect and ground spark plug
lead before servicing.
WARNING
arbon Monoxide can cause
severe nausea, fainting or death.
Do not operate engine in closed or
confined area.
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.
WARNING
Explosive Gas can cause fires and
severe acid burns.
Charge battery only in a well
ventilated area. Keep sources of
ignition away.
Accidental Starts!
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.
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.
Con ratulations  You have selected a fine four-cycle, single 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 valve design and splash 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 oil fill/check plug, air cleaner, spark
plug, and carburetor) are easily and quickly accessible.
 Parts subject to the most wear and tear (like the cylinder liner, crankshaft, and camshaft) are made from
precision formulated cast iron. Because the cylinder liner can be rebored, these engines can last even
longer.
 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 assistance.
To keep your engine in top operating condition, follow the maintenance procedures in this manual.

4
Fi ure 1. Location of Controls and Service Points on C6.
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 Type
Use high quality detergent oil of API (American
Petroleum Institute) service class SG, SH, SJ or
hi her. Select the viscosity based on the air
temperature at the time of operation as shown in the
following 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.
A logo or symbol on oil containers identifies the API
service class and SAE viscosity grade. See Figure 3.
3 U.S. Quart Capacity
Fuel Tank
Start-Stop
Switch (Optional)
Oil SentryTM Li ht
Fuel Shut-Off Valve
Control Panel
Coolin Air Intake
Retractable Starter
Housin
Retractable Starter Handle Oil Drain & Oil Fill/Check
Plu on Opposite Side
Oil Drain Plu
Air Cleaner Cover
Carburetor
Choke Lever
Valve Cover
Spark Plu
Coolin Air Outlet
Exhaust Pipe Muffler Shield Fuel Tank Cap
Throttle Lever
Air Cleaner Retainin Knob
*Use of synthetic oil having 5W-20 or 5W-30 rating is
acceptable, up to 40°F.
**Synthetic oils will provide better starting in extreme
cold (below -10°F).
Fi ure 2. Viscosity Grades Table.
** *Fi ure 3. Oil Container Lo o.
Refer to Maintenance Instructions be innin on
pa e 8 for detailed oil check, oil chan e, and oil
filter chan e procedures.

5
Engine Identification umbers
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 below (Figure 4) for future reference.
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.
Do not use gasoline left over from the previous season,
to minimi e gum deposits in your fuel system and to
insure 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 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. Leaded gasoline may be
used in areas where unleaded is not available and
exhaust emissions are not regulated. Be aware
however, that the cylinder head will 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.
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.
Fi ure 4. En ine 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 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)
*Small Off-Road En ines
IMPORTANT ENGINE INFORMATION
THIS ENGINE MEETS U.S. EPA PHASE 1 AND
CALIFORNIA 2006 AND LATER EMISSION
CONTROL REGULATIONS FOR SI SORE*
FAMILY
DISPL. (CC)
MODEL NO.
SPEC. NO.
SERIAL NO.
EMISSION COMPLIANCE PERIOD:
EPA: CARB:
KOHLER CO. KOHLER, WISCONSIN USA
THIS ENGINE IS CERTIFIED TO OPERATE
ON:
REFER TO OWNER'S MANUAL FOR SAFETY,
MAINTENANCE SPECS AND AD USTMENTS.
FOR SALES/SERVICE IN US/CANADA, CALL:
1-800-544-2444
www.kohlerengines.com
CARB Moderate
125 hours
Intermediate
250 hours
Extended
500 hours
Refer to certification label for engine displacement.
Exhaust Emission Control System for model CH6 is EM.

6
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 fuel level. Add fuel if low.
 Check cooling air intake 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.
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. Be sure to use the proper oil for the temperature
expected. See Figure 2 on page 4.
2. Declutch all possible external loads.
3. A warm battery has much more starting capacity
than a cold battery.
4. Use fresh winter grade fuel. NOTE: Winter grade
gasoline has higher volatility to improve starting.
Do not use gasoline left over from summer.
Fi ure 6. Location of Choke Lever.
Starting
1. Open fuel shut-off valve.
2. For a Cold En ine  Place the throttle control
midway between the slow and fast
positions. See Figure 5. Place the choke control
into the on position. See Figure 6.
For a Warm En ine (normal operatin
temperatures)  Place the throttle/choke control
midway between the slow and fast
positions. Place the choke control in the on
position. See Figure 6.
3. Place start-stop switch in the start position if so
equipped. See Figure 5.
4. Start the engine as follows:
For Retractable Start En ine  SLOWLY pull the
starter handle until just past compression  STOP!
Return starter handle, pull firmly with a smooth,
steady motion to start. Pull the handle straight out
to avoid excessive rope wear from the starter rope
guide.
Extend the starting rope periodically and check its
condition. If the rope is frayed, have it replaced
immediately by your Kohler Engine Service
Dealer.
WARNING: Accidental Starts!
Before extending and checking retractable starter rope
remove the spark plug lead to prevent the engine from
starting accidentally. Ground the lead to prevent sparks
that could cause fires. Make sure the equipment is in
neutral.
Fi ure 5. Control Panel.
Choke Lever
Choke On
Choke Off

7
For an Electric Start En ine  Activate the
starter 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: If the engine develops sufficient speed to
disengage the starter but does not keep
running (a false start), engine rotation
must be allowed to come to a complete
stop before attempting to restart the
engine. If the starter is engaged while the
flywheel is rotating, the starter pinion and
flywheel ring gear may clash, resulting in
damage to the starter.
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").
See your Kohler Engine Service Dealer for trouble
analysis.
3. For a Cold En ine  Gradually return the choke
control to the off position after the engine starts
and warms up.
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 En ine  Return choke to "off"
position as soon as engine starts.
Stopping
1. If possible, remove the load.
2. Move the throttle control to the slow or low
idle position. Allow the engine to run at idle for
30-60 seconds.
3. Move the throttle control to the stop position. Or
if equipped with optional startstop switch, move
the switch into the stop position.
4. Close fuel shut-off valve.
Battery
A 12 volt battery is normally used. Refer to the
operating instructions of the equipment this engine
powers for specific battery requirements.
If the battery charge is not sufficient to crank the
engine, recharge the battery (see page 11).
Operating
An le of Operation
This engine will operate continuously at angles up
to 20°. Check oil level to assure crankcase oil is up to
the point of overflowing the filler neck. See Figure 8.
Refer to the operating instructions of the equipment
this engine powers. Because of equipment design or
application, there may be more stringent restrictions
regarding the angle of operation.
NOTE: Do not operate this engine continuously at
angles exceeding 20° in any direction. Engine
damage could result from insufficient
lubrication.
Coolin
NOTE: If debris builds up on the grass screen or
other cooling air intake areas, stop the engine
immediately and clean. Operating the engine
with blocked or dirty air intake and cooling
areas can cause extensive damage due to
overheating.
WARNING: 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.
En ine Speed
NOTE: Do not tamper with the governor setting to
increase the maximum engine speed.
Overspeed is ha ardous and will void the
engine warranty.

8
Maintenance Instructions
Maintenance, repair, or replacement of the emission control devices and systems, which are bein done at
the customers expense, may be performed by any non-road en ine repair establishment or individual.
Warranty repairs must be performed by an authorized Kohler service outlet.
WARNING: Accidental Starts!
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.
Maintenance Schedule
These required maintenance procedures should be performed at the frequency stated in the table. They should
also be included as part of any seasonal tune-up.
¹Perform these maintenance procedures more frequently under extremely dusty dirty conditions.
²Have a Kohler Engine Service Dealer perform this service.
Check Oil Level
The importance of checking and maintaining the proper
oil level in the crankcase cannot be overemphasi ed.
Check oil BEFORE EACH USE as follows:
1. Make sure the engine is stopped, level, and is
cool so the oil has had time to drain into the sump.
2. To keep dirt, debris, etc., out of the engine, clean
the area around the oil fill/check plug before
removing it.
3. Unthread and remove the oil fill/check plug.
4. The level should be up to but not over, the point of
overflowing the filler neck.
Fi ure 7. Location of Oil Drain and Check Plu s.
NOTE: Just because you can see oil in the crankcase
doesn't mean the level is in the safe range.
Bring the level up to the point of overflowing
the filler neck.
 Service precleaner element¹.
Daily or Before
Startin En ine
Maintenance RequiredFrequency
 Fill fuel tank.
 Check oil level.
 Check air cleaner for dirty¹, loose, or damaged parts.
 Check air intake and cooling areas, clean as necessary¹.
Every 25 Hours
 Replace air cleaner element¹.
 Change oil¹.
 Remove cooling shrouds and clean cooling areas¹.
 Check spark plug condition and gap.
Every 100 Hours
Every 200 Hours
 Have bendix starter drive serviced2.
 Have valve to rocker arm clearance checked².
 Have Oil Sentry float switch checked2.
Annually or
Every 500 Hours
Filler
Neck
Oil Drain
Plu
Oil Fill/Check Plu

9
Change the oil as follows (see Figures 7 and 8):
1. To keep dirt, debris, etc., out of the engine, clean
the area around the oil fill cap/dipstick before
removing it.
2. Remove the oil drain plug and oil fill/check plug.
Be sure to allow ample time for complete drainage.
3. Reinstall the drain plug. Make sure it is tightened to
17.6 N·m (13 ft. lb.) torque.
4. Fill the crankcase, with new oil, of the proper type,
up to the point of overflowing the filler neck. Refer
to Oil Type on page 4. Always check the level
before adding more oil.
5. Reinstall the oil fill/check plug and tighten securely.
NOTE: To prevent extensive engine wear or
damage, always maintain the proper oil
level in the crankcase. Never operate the
engine with the oil level below the point of
overflowing the filler neck.
Service Precleaner and ir Cleaner Element
This engine is equipped with a replaceable, high density
paper air cleaner element. All engines are also
equipped with an oiled, foam precleaner which covers
the paper element. See Figure 9.
Check the air cleaner daily or before startin the
en ine. Check for a buildup of dirt and debris around
the air cleaner system. Keep this area clean. Also
check for loose or damaged components. Replace all
bent or damaged air cleaner components.
NOTE: Operating the engine with loose or damaged
air cleaner components could allow unfiltered
air into the engine causing premature wear
and failure.
Service Precleaner
Wash and reoil the precleaner every 25 hours of
operation (more often under extremely dusty or dirty
conditions).
1. Loosen air cleaner cover retaining knob and
remove the cover.
2. Remove the precleaner from the paper element.
3. Wash the precleaner in warm water with detergent.
Rinse the precleaner thoroughly until all traces of
detergent are eliminated. Squee e out excess
water (do not wring). Allow the precleaner to air dry.
Fi ure 8. Cutaway Showin Proper Oil Level.
5. If the level is low, add oil of the proper type, up to
the point of overflowing the filler neck. (Refer to
Oil Type on page 4.) Always check the level
before adding more oil.
NOTE: To prevent extensive engine wear or
damage, always maintain the proper oil
level in the crankcase. Never operate the
engine with the oil level below the point of
overflowing the filler neck.
Oil Sentry
Some engines are equipped with an optional Oil
Sentry oil level switch. If the oil level decreases
below an acceptable level, the Oil Sentry will either
shut off the engine or activate a warning signal,
depending on the application.
NOTE: Make sure the oil level is checked BEFORE
EACH USE and is maintained up to the point
of overflowing the filler neck. This includes
engines equipped with Oil Sentry.
Change Oil
For a new en ine, change oil after the first 20 hours
of operation. Thereafter, change oil after every 100
hours of operation.
For an overhauled en ine, use 10W-30 service class
SG, SH, SJ or higher oil for the first 5 hours of
operation. Change the oil after this initial run-in period.
Refill with service class SG, SH, SJ or higher oil as
specified in the Viscosity Grades table (Figure 2) on
page 4.
Change the oil while the engine is still warm. The oil
will flow freely and carry away more impurities. Make
sure the engine is level when filling, checking, or
changing the oil.
Filler Neck
Brin Level Up
To Point Of
Overflow

10
4. Saturate the precleaner with new engine oil.
Squee e out all excess oil.
5. Reinstall the precleaner over the paper element.
6. Reinstall air cleaner cover.
7. Tighten the air cleaner cover retaining knob.
Service Paper Element
Every 100 hours of operation (more often under
extremely dusty or dirty conditions), replace the paper
element.
1. Loosen air cleaner cover retaining knob and
remove the cover.
2. Remove the precleaner from the paper element.
3. Remove the wing nut, washer, and element cover
with grommet. Remove paper element.
4. Replace a dirty, bent, or damaged element with a
genuine Kohler element. Do not wash the paper
element or use pressurized air, as this will
damage the element. Handle new elements
carefully; do not use if the sealing surfaces are
bent or damaged.
5. When servicing the air cleaner, check the air
cleaner base. Make sure it is secured and not
bent or damaged. Also check the air cleaner
element cover for damage or improper fit. Replace
all bent or damaged air cleaner components.
6. Install new or serviced paper element and
components as follows:
a. Position paper element on base.
b. Slide element cover with grommet then
washer onto stud, secure with wing nut.
c. Reinstall the precleaner over the paper
element.
d. If the air cleaner cover ring separated from
the element cover, reinstall it.
e. Reinstall air cleaner cover and secure with
the retaining knob.
Fi ure 9. Air Cleaner Elements.
Air Cleaner
Base
Precleaner
Paper
Element
Element
Cover
Air Cleaner
Cover Rin
Grommet
Washer
Win Nut
Air Cleaner
Cover
Cover
Retainin Knob

11
Clean ir Intake/Cooling reas
To ensure proper cooling, make sure the grass screen,
cooling fins, and other external surfaces of the engine
are kept clean at all times.
Every 100 hours of operation (more often under
extremely dusty, dirty conditions), remove the blower
housing and other cooling shrouds. Clean the cooling
fins and external surfaces as necessary. Make sure the
cooling shrouds are reinstalled.
NOTE: Operating the engine with a blocked grass
screen, dirty or plugged cooling fins, and/or
cooling shrouds removed, will cause engine
damage due to overheating.
Ignition System
This engine is equipped with a dependable electronic
magneto ignition system. Other than periodically
checking/replacing the spark plug, no maintenance,
timing, or adjustments are necessary or possible with
this system.
In the event starting problems should occur which are
not corrected by replacing the spark plug, see your
Kohler Engine Service Dealer for trouble analysis.
Check Spark Plug
Every 200 hours of operation, remove the spark plug,
check condition, and reset the gap or replace with new
plug as necessary. Use a Champion® type RC12YC (or
equivalent) spark plug.
1. Before removing the spark plug, clean the area
around the base of the plug to keep dirt and debris
out of the engine.
2. Remove the plug and check its condition.
Replace the plug if worn or reuse is questionable.
NOTE: Do not clean the spark plug in a machine
using abrasive grit. Some grit could
remain in the spark plug and enter the
engine causing extensive wear and
damage.
3. Check the gap using a wire feeler gauge. Adjust
the gap to 1.02 mm (0.040 in.) by carefully
bending the ground electrode. See Figure 10.
4. Reinstall the spark plug into the cylinder head.
Torque the spark plug to 24.4-29.8 N·m
(18-22 ft. lb.).
Wire Gau e
Ground
Electrode
Spark Plu
1.02 mm
(0.040 in.) Gap
Fi ure 10. Servicin Spark Plu .
Battery Charging
WARNING: 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.
NOTE: Do not apply 12 volt DC to kill terminal of
ignition module.
Fuel Filter
Some engines are equipped with an in-line fuel filter.
Periodically inspect the filter and replace when dirty.
Use a genuine Kohler filter.

12
 Make sure the air cleaner element is clean and all
air cleaner element components are fastened
securely.
If, after checking the items listed above, the engine is
hard to start, runs roughly, or stalls at low idle speed, it
may be necessary to adjust or service the carburetor.
djust Carburetor
NOTE: Certified engines may have a fixed idle or
limiter cap on the idle fuel adjusting needle.
Step 2 can only be performed within the limits
allowed by the cap.
1. Start the engine and run at half throttle for 5 to 10
minutes to warm up. The engine must be warm
before making final settings (steps 2 and 3).
2. Low Idle Fuel Needle Settin : Place the throttle
into the idle or slow position.
Turn the low idle fuel adjusting needle out
(counterclockwise) from the preliminary setting
until engine speed decreases (rich). Note the
position of the needle.
Now turn the adjusting needle in (clockwise). The
engine speed may increase, then it will decrease
as the needle is turned in (lean). Note the position
of the needle.
Set the adjusting needle midway between the rich
and lean settings. See Figure 12.
Carburetor Troubleshooting
and Adjustments
NOTE: Carburetor adjustments should be made only
after the engine has warmed up.
This engine is equipped with a fixed main jet
carburetor. See Figure 11.
Fi ure 11. Fixed Main Jet Carburetor.
The carburetor is designed to deliver the correct
fuel-to-air mixture to the engine under all operating
conditions. The main fuel jet is calibrated at the factory
and is not adjustable. The low idle fuel adjusting needle
is also set at the factory and normally does not need
adjustment.
Troubleshooting
If engine troubles are experienced that appear to be
fuel system related, check the following areas before
adjusting the carburetor.
 Make sure the fuel tank is filled with clean, fresh
gasoline.
 Make sure the fuel tank cap vent is not blocked
and that it is operating properly.
 If the fuel tank is equipped with a shut-off valve,
make sure it is open.
 If the engine is equipped with an in-line fuel filter,
make sure it is clean and unobstructed. Replace
the filter if necessary.
 Make sure fuel is reaching the carburetor. This
includes checking the fuel lines for restrictions or
faulty components, replace as necessary.
Fi ure 12. Optimum Low Idle Fuel Settin .
3. Low Idle Speed Settin : Place the throttle control
into the idle or slow position. Set the low idle
speed to 1200 RPM* (± 75 RPM) by turning the
low idle speed adjusting screw in or out. Check
the speed using a tachometer.
Choke Lever
Low Idle Fuel
Adjustin Needle Low Idle Speed
Adjustin Screw
Lean
Rich
Adjust to
Midpoint

13
*NOTE: The actual low idle speed depends on the application  refer to equipment manufacturers
recommendations. The recommended low idle speed for basic engines is 1200 RPM. To ensure best
results when setting the low idle fuel needle, the low idle speed must not exceed 1500 RPM.
Troubleshooting
When troubles occur, be sure to check the simple causes which, at first, may seem to obvious to be considered.
For example, a starting problem could be caused by an empty fuel tank. Some common causes of engine troubles
are listed in the following table.
Do not attempt to service or replace major engine components, or any items that require special timing or
adjustment procedures. Have your Kohler Engine Service Dealer do this work.
Possible ause No Improper Dirt In Dirty Incorrect Engine Dirty Air Faulty
Problem Fuel Fuel Fuel Line Grass Screen Oil Level Overloaded leaner Spark Plug
Will Not Start  
Hard Starting     
Stops Suddenly  
Lacks Power 
Operates Erratically   
Knocks or Pings   
Skips or Misfires  
Backfires 
Overheats 
High Fuel onsumption 
Storage
If the engine will be out of service for two months or
more, use the following storage procedure:
1. Clean the exterior surfaces of the engine.
2. Change the oil while the engine is still warm from
operation. See Change Oil on page 9.
3. The fuel system must be completely emptied, or
the gasoline must be treated with a stabili er to
prevent deterioration. If you choose to use a
stabili er, follow the manufacturers
recommendations, and add the correct amount for
the capacity of the fuel system. Fill the fuel tank
with clean, fresh gasoline. Run the engine for 2-3
minutes to get stabili ed fuel into the carburetor.
To empty the system, run the engine until the tank
and system are empty.
4. Remove the spark plug. Add one tablespoon of
engine oil into the spark plug hole. Install the plug,
but do not connect the plug lead. Crank the engine
two or three revolutions.
5. Remove the spark plug. Cover the spark plug hole
with your thumb, and turn the engine over until the
piston is at the top of its stroke. (Pressure against
the thumb is greatest.) Reinstall the plug, but do
not connect the plug lead.
6. Store the engine in a clean, dry place.
Parts Ordering
The engine Model, Specification, and Serial Numbers
are required when ordering replacement parts from
your Kohler Engine Service Dealer. These numbers are
found on the identification plate which is affixed to the
engine shrouding. Include letter suffixes if there are
any. See Engine Identification Numbers on page 5.
Always insist on genuine Kohler parts. All genuine
Kohler parts meet strict standards for fit, reliability, and
performance.
Major Repair
Major repair information is available in Kohler Engine
Service Manuals. However, major repair generally
requires the attention of a trained mechanic and the
use of special tools and equipment. Your Kohler Engine
Service Dealer has the facilities, training, and genuine
Kohler replacement parts necessary to perform this
service. For Sales & Service assistance call
1-800-544-2444 (U.S. & Canada) or contact your
Kohler Engine Dealer or Service Distributor, they're in
the Yellow Pages under Engines-Gasoline.

14
Model Designation
Model CH6T for example: C designates Command
engine, H designates hori ontal crankshaft, and 6
designates horsepower. A suffix letter designates a
specific version as follows:
Specifications
Model:.............................................................................................................................................. CH6
Bore: ...................................................................................................................... mm (in.) ........... 67 (2.64)
Stroke: ................................................................................................................... mm (in.) ........... 51 (2.01)
Displacement:........................................................................................................ in3 (cm3) ........... 180 (10.98)
Power (@ 4000 RPM): .......................................................................................... kW (HP) ........... 4.47 (6*)
Max. Torque: ................................................................................ N·m (ft. lb.) @ 2400 RPM ........... 11.74 (8.66)
Compression Ratio: ......................................................................................................................... 8.5:1
Weight (Approx.): ..................................................................................................... kg (lb.) ........... 20.4 (45)
Oil Capacity (Approx.):.............................................................................. liters (U.S. pints) ........... 0.60 (1.3)
Fuel Tank Capacity (Approx.):................................................................. liters (U.S. quarts) ........... 3.18 (3)
Exhaust Emission Control System for model CH6 is EM.
*Horsepower ratings are established in accordance with Society of Automotive Engineers  Small Engine Test
Code  J1995 GROSS. Kohler Co. reserves the right to change product specifications, design, and standard
equipment without notice and without incurring obligation.
LIMITED 2 YEAR COMMA D E GI E WARRA TY
We warrant to the original consumer that each new COMMAND engine sold by us will be free from manufacturing defects in materials or
workmanship in normal service for a period of two (2) years from date of purchase, provided it is operated and maintained in accordance
with Kohler Co.s instructions and manuals.
Our obligation under this warranty is expressly limited, at our option, to the replacement or repair at Kohler Co., Kohler, Wisconsin 53044,
or at a service facility designated by us of such parts as inspection shall disclose to have been defective.
EXCLUSIONS:
Mufflers on engines used commercially (non-residential) are warranted for one (1) year from date of purchase, except catalytic mufflers,
which are warranted for two (2) years.
This warranty does not apply to defects caused by casualty or unreasonable use, including faulty repairs by others and failure to provide
reasonable and necessary maintenance.
The following items are not covered by this warranty:
Engine accessories such as fuel tanks, clutches, transmissions, power-drive assemblies, and batteries, unless supplied or installed by
Kohler Co. These are subject to the warranties, if any, of their manufacturers.
WE SHALL NOT BE LIABLE FOR SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES OF ANY KIND, including but
not limited to labor costs or transportation charges in connection with the repair or replacement of defective parts.
ANY IMPLIED OR STATUARY WARRANTIES, INCLUDING WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE, ARE EXPRESSLY LIMITED TO THE DURATION OF THIS WRITTEN WARRANTY. We make no other express warranty, nor
is any one authorized to make any in our behalf.
Some states do not allow limitations on how long an implied warranty lasts, or the exclusion or limitation of incidental or consequential
damages, so the above limitation or exclusion may not apply to you.
This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
TO OBTAIN WARRANTY SERVICE:
Purchaser must bring the engine to an authorized Kohler service facility. For the facility nearest you, consult your Yellow Pages or write
Kohler Co., Attn: Engine Warranty Service Dept., Kohler, Wisconsin, 53044.
ENGINE DIVISION, KOHLER CO., KOHLER, WISCONSIN 53044
Suffix Desi nates
T Retractable Start
ST Electric/Retractable Start
GT Generator Application/Retractable Start
PT Pump/Retractable Start
EP Electric Plant

15
KOHLER CO.
FEDERAL A D CALIFOR IA EMISSIO CO TROL SYSTEMS
LIMITED WARRA TY
SMALL OFF-ROAD E GI ES
The U.S. Environmental Protection Agency (EPA), the California Air Resources Board (CARB), and Kohler Co. are pleased to explain the
Federal and California Emission Control Systems Warranty on your small off-road equipment engine. For California, engines produced in
1995 and later must be designed, built and equipped to meet the states stringent anti-smog standards. In other states, new 1997 and later
model year engines must be designed, built and equipped, to meet the U.S. EPA regulations for small non-road engines. The engine must
be free from defects in materials and workmanship which cause it to fail to conform with U.S. EPA standards for the first two years of engine
use from the date of sale to the ultimate purchaser. Kohler Co. must warrant the emission control system on the engine for the period of
time listed above, provided there has been no abuse, neglect or improper maintenance.
The emission control system may include parts such as the carburetor or fuel injection system, the ignition system, and catalytic converter.
Also included are the hoses, belts and connectors and other emission related assemblies.
Where a warrantable condition exists, Kohler Co. will repair the engine at no cost, including diagnosis (if the diagnostic work is performed at
an authorized dealer), parts and labor.
MANUFACTURERS WARRANTY COVERAGE
Engines produced in 1995 or later are warranted for two years in California. In other states, 1997 and later model year engines are
warranted for two years. If any emission related part on the engine is defective, the part will be repaired or replaced by Kohler Co. free of
charge.
OWNERS WARRANTY RESPONSIBILITIES
(a) The engine owner is responsible for the performance of the required maintenance listed in the owners manual. Kohler Co.
recommends that you retain all receipts covering maintenance on the engine, But Kohler Co. cannot deny warranty solely for the lack
of receipts or for your failure to assure that all scheduled maintenance was performed.
(b) Be aware, however, that Kohler Co. may deny warranty coverage if the engine or a part has failed due to abuse, neglect, improper
maintenance or unapproved modifications.
(c) For warranty repairs, the engine must be presented to a Kohler Co. service center as soon as a problem exists. Call 1-800-544-2444
or access our website at www.kohlerengines.com, for the names of the nearest service centers. The warranty repairs should be
completed in a reasonable amount of time, not to exceed 30 days.
If you have any questions regarding warranty rights and responsibilities, you should contact Kohler Co. at 1-920-457-4441 and ask for an
Engine Service representative.
COVERAGE
Kohler Co. warrants to the ultimate purchaser and each subsequent purchaser that the engine will be designed, built and equipped, at the
time of sale, to meet all applicable regulations. Kohler Co. also warrants to the initial purchaser and each subsequent purchaser, that the
engine is free from defects in materials and workmanship which cause the engine to fail to conform with applicable regulations for a period
of two years.
Engines produced in 1995 or later are warranted for two years in California. For 1997 and later model years, EPA requires manufacturers to
warrant engines for two years in all other states. These warranty periods will begin on the date the engine is purchased by the initial
purchaser. If any emission related part on the engine is defective, the part will be replaced by Kohler Co. at no cost to the owner. Kohler Co.
is liable for damages to other engine components caused by the failure of a warranted part still under warranty.
Kohler Co. shall remedy warranty defects at any authorized Kohler Co. engine dealer or warranty station. Warranty repair work done at an
authorized dealer or warranty station shall be free of charge to the owner if such work determines that a warranted part is defective.
Listed below are the parts covered by the Federal and California Emission Control Systems Warranty. Some parts listed below may require
scheduled maintenance and are warranted up to the first scheduled replacement point for that part. The warranted parts are:
Oxygen sensor (if equipped) Ignition module(s) with high tension lead
Intake manifold (if equipped) Gaseous fuel regulator (if equipped)
Exhaust manifold (if equipped) Electronic control unit (if equipped)
Catalytic muffler (if equipped) Carburetor or fuel injection system
Fuel metering valve (if equipped) Fuel lines (if equipped)
Spark advance module (if equipped) Air filter, fuel filter, and spark plugs (only
Crankcase breather to first scheduled replacement point)
Continued on next page.

16
FOR SALES AND SERVICE INFORMATION
IN U.S. AND CANADA, CALL
1-800-544-2444
LITHO IN U.S.A.
FORM NO.: TP-2471-C
ISSUED: 12/94
REVISED: 12/01
MAILED:
EN INE DIVISION, KOHLER CO., KOHLER, WISCONSIN 53044
LIMITATIONS
This Emission Control Systems Warranty shall not cover any of the following:
(a) repair or replacement required because of misuse or neglect, improper maintenance, repairs improperly performed or replacements
not conforming to Kohler Co. specifications that adversely affect performance and/or durability and alterations or modifications not
recommended or approved in writing by Kohler Co.,
(b) replacement of parts and other services and adjustments necessary for required maintenance at and after the first scheduled
replacement point,
(c) consequential damages such as loss of time, inconvenience, loss of use of the engine or equipment, etc.,
(d) diagnosis and inspection fees that do not result in eligible warranty service being performed, and
(e) any add-on or modified part, or malfunction of authorized parts due to the use of add-on or modified parts.
MAINTENANCE AND REPAIR REQUIREMENTS
The owner is responsible for the proper use and maintenance of the engine. Kohler Co. recommends that all receipts and records covering
the performance of regular maintenance be retained in case questions arise. If the engine is resold during the warranty period, the
maintenance records should be transferred to each subsequent owner. Kohler Co. reserves the right to deny warranty coverage if the
engine has not been properly maintained; however, Kohler Co. may not deny warranty repairs solely because of the lack of repair
maintenance or failure to keep maintenance records.
Normal maintenance, replacement or repair of emission control devices and systems may be performed by any repair establishment or
individual; however, warranty repa rs must be performed by a Kohler author zed serv ce center. Any replacement part or service that
is equivalent in performance and durability may be used in non-warranty maintenance or repairs, and shall not reduce the warranty
obligations of the engine manufacturer.