Kohler Magnum 8 HP Kullanıcı El Kitabı - Sayfa 11

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Kohler Carburetor Adjustment

1. With the engine stopped, turn the fuel adjusting

needles in (clockwise) until they bottom lightly.

NOTE: The tip of the idle fuel and main fuel

adjusting needles are tapered to critical

dimensions. Damage to the needles and

the seats in carburetor body will result if

the needles are forced.

2. Preliminary Settings: Turn the adjusting needles

out (counterclockwise) from lightly bottomed as

follows:

Kohler Adjustable Jet

Low Idle

High Idle

1 -1/4 turns

2 turns

2-1/2 turns

2 turns

2-1/2 turns

3-1/2 turns

3. 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 4-6).

4. Main Fuel Needle Setting: This adjustment is

required for adjustable main jet carburetors only. If

the carburetor is a fixed main jet type, refer to

Walbro adjustment.

Place the throttle into the "fast"position. If

possible, place the engine under load.

Turn the main fuel adjusting needle out

(counterclockwise) from the preliminary setting

until the 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 8.

Lean

5. Low Idle Fuel Needle Setting: Place the throttle

into the "idle" or "slow" position.

Use the same procedure used for the main fuel

needle and set the adjusting needle midway

between the rich and lean settings.

6. Low Idle Speed Setting: Place the throttle control

into the "id1e"or "s1ow"position. Set the low idle

speed to 7200 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. To ensure best

results when setting the low idle fuel

needle, the low idle speed must not

exceed 1500 RPM.

Walbro Carburetor Adjustment

In general, turning the adjusting needles in (clockwise)

decreases the supply of fuel to the carburetor. This

gives a leanerfuel-to-air mixture. Turning the adjusting

needles out (counterclockwise) increases the supply of

fuel to the carburetor.

Carburetors on certified engines have a fixed (non-

adjustable) main jet. In steps 1 and 2, perform only

what pertains to the idle fuel needle. Skip step 4.

Low Idle Fuel

Adjusting Needle

Low Idle Speed

Hi'gh Idle Fuel

Adjusting Needle

(Adj, Jet Carbs, Only)

Figure 9,

1. With the engine stopped, turn the adjusting

needle(s) in (clockwise) until it bottoms lightly.

NOTE: The tips of the fuel adjusting needles are

tapered to critical dimensions. Damage to

the needles and the seats in carburetor

body will result if the needles are forced.

Tgure 8,