Ryobi 232RD Manuel de l'opérateur télécharger pdf (Page 24)

24 – English

MAINTENANCE

Carburettor

Your Husqvarna product has been designed and

manufactured to specifications that reduce harmful

emissions.

After your unit has been run 8-10 tanks of fuel the engine

has broken in. To ensure that your unit is at peak

performance and producing the least amount of harmful

emissions after break in, have your authorized servicing

dealer, who has a revolution counter at his disposal, to adjust

your carburettor for optimum operating conditions.

Functioning

• The carburettor governs

the engine speed via the

throttle trigger. In the

carburettor, air/fuel is

mixed. This air/fuel

mixture is adjustable. If

you want to take

advantage of the

maximum output of the

engine, the setting must be

corret.

• The setting of the

carburettor means that the

engine is adjusted to local

conditions, for example

climate, altitude, petrol

and type of two-stroke oil.

• The carburettor has three

adjustment possibilities:

L= Low speed needle

H= High speed

adjustment screw

T= Idle speed adjustment

screw

• The fuel quantity required in proportion to the airflow the

throttle trigger level allows is adjusted by means of the L-

and H-needles. Turning the needles clockwise gives a leaner

fuel mixture (less fuel), turning them counter-clockwise gives

a richer fuel mixture (more fuel). A lean mixture gives higher

rpms and a rich one lower rpms.

• The idling speed screw T regulates the position of the

throttle lever in the idling speed position. Turn the idling

speed screw clockwise gives a higher idling speed, turn it

counter-clockwise a lower idling speed.

Basic setting

• The carburettor is set to its basic setting when test run at the

factory. The basic setting should be kept during the

machine‘s first working hours. Thereafter the carburettor

should be finely adjusted. Fine adjustment should be carried

out by a skilled technician.

NOTE! If the cutting attachment rotates/moves in the idling

position, turn the idling speed screw counter-clockwise until

the blade stops.

Rec. idling speed: 2700 rpm.

Recommended max. speed: See “technical data”.

WARNING!

The complete clutch cover with shaft must

be fitted before the machine is started,

otherwise the clutch can become loose

and cause personal injury.

WARNING!

Contact your servicing dealer, if the idle

speed setting cannot be adjusted so

that the cutting attachment stops. Do

not use the machine until it has been

properly adjusted or repaired.

Fine adjustment

• When the machine has been ”run-in” the carburettor should

be finely adjusted. The fine adjustment should be carried

out by qualified person. First adjust the L-jet, then the

idling screw T and then the H-jet.

Conditions

• Before any adjustments are made the airfilter should be clean

and the airfilter cover fitted. Adjusting the carburettor while

a dirty airfilter is in use will result in a leaner mixture when

the filter is finally cleaned. This can give rise to serious

engine damage.

• Carefully turn the L and H needle to the mid point between

fully turned in and fully turned out.

• Do not attempt to adjust the needles beyond the stops as

damage can occur.

• Now start the machine according to the starting instructions

and run it warm for 10 minutes.

NOTE! If the cutting attachment rotates/moves the T screw

should be turned anti-clockwise until the cutting attachment

stops.

Low speed needle L

Try to find the highest idling

speed, turning the low speed

needle L clockwise

respectively counter-

clockwise. When the highest

speed has been found, turn

the low speed needle L 1/4

turn counter-clockwise.

NOTE! If the cutting

attachment rotates/moves in

the idling position, turn the

idling speed screw T

counter-clockwise until the

cutting attachment stops.

+ 1/4

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Ryobi 232RD Manuel de l'opérateur Page 24

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