Kohler K341 Owner's Manual - Page 11

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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.

Kohler Carburetor

Adjustment

1. With the engine stopped, turn the low and main

fuel adjusting

needles in (clockwise)

until it

bottoms lightly.

NOTE:

The tip of the idle fuel and main idle 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

K241

K301

K321

K341

2-I/2 turns

2-1 I2 turns

2-l I2 turns

2 turns

3-l/4 turns

3-l I2 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.

Main Fuel Needle Setting: This adjustment

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 wide-open

or "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.

5. Low Idle Speed Setting: 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.

*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.

6. Low Idle Fuel Needle Setting:

Place the throttle

into the "idle" or "slow" position.

Turn the idle 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

at the needle is turned in (lean). Note the position

of the needle.

Set the adjusting needle midway between the

rich and lean settings.

Adjust To

Midpoint

Lean

Rich

-0-B

Figure 8.

7. Recheck idle speed using a tachometer.

Readjust

speed as necessary.