Kohler Command CH14 Kullanıcı El Kitabı - Sayfa 12

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Reduction Gear Units

On engines equipped with a reduction gear unit, remove

the oil plug on lower part of cover every 50 hours of

operation to check oil level. With the engine level, the oil

level of the unit should be up to the bottom of the oil plug

hole. To add oil, remove the vented plug at the top of the

unit. Use AGMA No. 7 EP oil in the reduction gear unit.

Following are a few products that meet this spec:

Mobilgear 634

Pennzoil Super Maxol ''S''

Pennzoil Maxol EP Gear Oil

Pennzoil Super Maxol EP Gear Oil

Pennzoil Super Pennztac EP Gear Oil

Carburetor Troubleshooting

and Adjustments

NOTE: Carburetor adjustments should be made only

after the engine has warmed up.

These engines are equipped with one of two basic types

of fixed jet carburetors – Walbro or Nikki.

The carburetor is designed to deliver the correct

fuel-to-air mixture to the engine under all operating

conditions. On both types of carburetors, the fixed main

jet is calibrated at the factory and is not adjustable. On

Walbro carburetors, the low idle fuel adjusting needle is

set at the factory and normally does not need

adjustment. Certified engines may have a fixed idle or

limiter cap on the idle fuel adjusting needle. The idle

fuel can only be adjusted within the limits allowed by the

cap. Nikki carburetors have a sealed idle fuel adjusting

needle which is not adjustable.

Walbro

Low Idle

Speed Adj.

Screw

Low Idle

Fuel Adj.

Needle

Nikki

Low Idle

Speed Adj.

Screw

Figure 13. Carburetors.

NOTE: To ensure correct engine operation at altitudes

above 1525 meters (5000 ft.), it may be

necessary to have an authorized Kohler dealer

install a special high-altitude jet kit in the

carburetor. If a high-altitude kit has been

installed, the engine must be reconverted to

the original jet size, before it is operated at

lower altitudes, or overheating and engine

damage can result.

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 and fuel pump for

restrictions or faulty components, replace as

necessary.

• Make sure the air cleaner element is clean and all

air cleaner 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.

Carburetor Adjustment

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 doing steps 2 and 3.

2. Low Idle Fuel Needle Setting: 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.