Bedienungsanleitung McCulloch B28 B (Seite 20 von 27) (Englisch, Französisch, Spanisch)

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English---20

115430026 Rev. 4 2/17/12

MAINTENANCE

Carburetor

Your McCulloch product has been designed

and manufactured to specifications that re-

duce harmful emissions. After the engine

has used 8--10 tanks of fuel, the engine will

be run--in. To ensure that it continues to run

at peak performance and to minimize harm-

ful exhaust emissions after the run--in peri-

od, ask your servicing dealer to adjust your

carburetor .

The li

e span o

the machine can be reduced

and the risk of accidents can increase if

machine maintenance is not carried out

correctly and if service and/or repairs are not

carried out professionally. If you need further

information, please contact your nearest

authorised service dealer.

W ARNING: The complete clutch,

clutch cover , and shaft must be

fitted before the machine is started,

otherwise parts could come loose

and cause personal injury .

Function

S The carburetor governs the engine’s

speed via the throttle control. Air and fuel

are mixed in the carburetor.

S The T--screw regulates the throttle setting

at idle speed. If the T--screw is turned

clockwise this gives a higher idle speed;

turning it counterclockwise gives a lower

idle speed.

Basic setting

S The basic carburetor settings are ad-

justed during testing at the factory. Fine

adjustment should be carried out by a

skilled technician.

Recommended idle speed:

See “Technical data” section.

Recommended max. speed:

See “Technical data” section.

CAUTION! If the cutting attachment rotates

when the engine is idling the idle adjustment

screw T should be turned counterclockwise

until the cutting attachment stops.

Fine adjustment of the idle speed--T

Adjust the idle speed using the idle adjust-

ment screw--T if it is necessary to readjust.

First, turn the idle adjustment screw--T

clockwise until the cutting attachment starts

to rotate. Then, turn the screw counter-

clockwise until the cutting attachment stops.

The idle speed is correctly adjusted when

the engine will run smoothly in every posi-

tion. The idle speed should also be well

below the speed at which the cutting attach-

ment starts to rotate.

W ARNING: The cutting attach-

ment may be spinning during carbu-

retor adj ustments . Wea r your protec-

tive equipment and observe all safe-

ty instructions. Be sure the cutting

attachm ent stops turning when the

engine idles. When the unit is turned

off, make sure the cutting attach-

ments has stopped before the unit is

set down.

Idle Speed

Screw --T

Muffler

CAUTION! Muffler is fitted with a catalytic

converter designed to reduce harmful ex-

haust gases.

The muffler is designed to reduce the noise

level and to direct the exhaust gases away

from the operator. The exhaust gases are

hot and can contain sparks, which may

cause fire if directed against dry and com-

bustible material.

Mufflers are equipped with a special spark

arrestor mesh. The mesh should be

checked and, if necessary. cleaned by a

servicing dealer . If the mesh is damaged,

it should be replaced.

Unit/Maintenance Safety

Disconnect the spark plug before perform-

ing maintenance, except carburetor adjust-

ments.

If the mesh is frequently blocked, this can

be a sign that the performance of the cata-

lytic converter is impaired. Contact your

servicing dealer to inspect the muffler. A

blocked mesh will cause the machine to

overheat and result in damage to the cylin-

der and piston.

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McCulloch B28 B Seite 20

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