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12

Adjust Carburetor

1. Start the engine and run at half throttle for 5 to 10

minutes to warm up. The engine must be warm
before adjusting the low idle speed setting.

2. Low Idle Speed Setting: Place the throttle control

into the ‘‘idle’’ or ‘‘slow’’ position. The low idle
speed screw can be accessed through the air
cleaner. Remove the outer cover and look for the
grommet in the element cover. If the air cleaner is
assembled correctly, the grommet is aligned with
a corresponding hole in the air cleaner base,
directly above the low idle speed screw. Insert the
screwdriver (#1 Phillips) down through grommet to
make the adjustment. 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.

*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.

Carburetor Troubleshooting and Adjustments

NOTE: Carburetor adjustments should be made only

after the engine has warmed up.

The carburetor is designed to deliver the correct
fuel-to-air mixture to the engine. Fuel mixture settings
are set at the factory and are not adjustable.

Troubleshooting Carburetor

If engine troubles are experienced that appear to be
fuel system related, check the following
troubleshooting hints.

• 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 and fuel pump for
restrictions or faulty components. Replace as
necessary.

• 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.

Figure 12. Carburetor (with Fuel Shutdown
Solenoid).

Low Idle Speed
Adjusting Screw

Содержание Triad OHC TH520

Страница 1: ...1 KOHLER TRIAD OHC TH520 TH650 HORIZONTAL CRANKSHAFT OWNER S MANUAL...

Страница 2: ...hields 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 Th...

Страница 3: ...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 dependab...

Страница 4: ...e 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...

Страница 5: ...bers 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...

Страница 6: ...un at idle for 30 60 seconds then stop the engine b For engines equipped with a shutdown solenoid Position the throttle control somewhere between half and full throttle then stop the engine Pre Start...

Страница 7: ...high speed for these engines is 3960 RPM no load Maintenance Instructions Maintenance repair or replacement of the emission control devices and systems which are being done at the customers expense ma...

Страница 8: ...sure the engine is level when filling checking and changing the oil Change the oil as follows see Figure 6 1 To keep dirt debris etc out of the engine clean the area around the oil fill cap and dipsti...

Страница 9: ...e a genuine Kohler oil filter Use chart below to determine part number to order Figure 7 Standard Air Cleaner Housing Components Figure 8 Standard Air Cleaner Components Air Cleaner Cover Cover Retain...

Страница 10: ...improper fit Replace all damaged air cleaner components 6 Check the condition of the rubber seals on the air cleaner studs If they are worn damaged or their condition is questionable in any way repla...

Страница 11: ...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 questionabl...

Страница 12: ...should be made only after the engine has warmed up The carburetor is designed to deliver the correct fuel to air mixture to the engine Fuel mixture settings are set at the factory and are not adjustab...

Страница 13: ...ting 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 tha...

Страница 14: ...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...

Страница 15: ...or 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 web site at www kohlerengines com for the names of the near...

Страница 16: ...nd 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 w...

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