Bedienungsanleitung Solo 646 (Seite 20 von 26) (Englisch)

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Operating and maintenance information

ENGLISH 20 - 42 -.

11.4 Carburettor settings

The carburettor is preset to the optimum settings for

the device at the factory. Depending on the particular

location where the chainsaw is used (mountains, flat

country) it may be necessary to adjust the idling

settings via the idle stop screw "T" (24).

When the idling settings are correct the engine

should run smoothly at idle without the saw chain

being driven. Corrective adjustments to the average

idle speed indicated in the technical data can be

made as follows via the idle stop screw "T" – ideally

with the aid of a tachometer:

• If the idle speed is too high (particularly if the saw

chain is already driven without the throttle being

operated), slightly open up the idle stop screw

"T" by turning it anti-clockwise.

• If the idle speed is too low (i.e. the engine keeps

stopping at idle), slightly close the idle stop screw

"T" by turning it clockwise until the engine runs

evenly.

The saw chain must never be driven while the

engine is idling.

If the idling speed cannot be set correctly with the

idling end-stop screw "T", request an authorised

service centre to tune the carburettor.

The adjusting screws for the idling mixture "L"

and the full-load mixture "H" (25) must only be

adjusted by an authorised workshop.

The following instructions are for authorised

service shops

D-CUT carburettors:

Use the D-CUT carburettor key to adjust the idle

mixture screw "L" and the full load mixture screw "H".

Carburettors with limiter caps:

The regulating screws for idle mixture and full load

mixture can only be adjusted in a limited range.

Clean the air filter before adjusting the low speed

screw!

Let the engine run warm before adjusting the engine

speed.

The carburettor is tuned for optimum engine

performance. Use a rev counter to tune the

carburettor correctly!

Do not adjust the engine to a higher speed.

Excessive engine speed can lead to major engine

damage!

11.5 Vibration damping

If you find that vibrations on the handles worsen

significantly with time in comparison to when the

chainsaw was new, check the damping elements

(rubber-bonded metal mountings) for damage and

replace them as required.

Working with the chainsaw while the

vibration damping system is not working

properly can cause health problems.

11.6 Maintenance of the chain brake

Check for ease of movement and correct operation on a

daily basis. Remove any resin, sawdust and dirt.

Visible joints and bearings should be lubricated with

grease or temperature-resistant engine oil.

• Chain brake function test (chapter 7.).

11.7 Spark plug information

The spark plug should be regularly checked every 50

operating hours.

• Take off the cowl from the chainsaw.

• Disconnect the spark plug connector which is

located underneath.

• Unscrew the spark plug and dry it thoroughly.

In the event of severe burn-off of the electrodes the

spark plug should be replaced immediately, otherwise

every 100 hours.

The engine must not be moved if the spark plug is

removed or the ignition cable is disconnected.

Otherwise there is a risk that sparks could form which

might cause a fire.

Interference-suppressed replacement spark plugs

(calorific value: 200) are available for example under

the following trade names:

BOSCH WSR6F

CHAMPION RCJ-6Y or equivalent.

The prescribed electrode gap is 0.5 mm.

Before starting work, check the ignition cable to make

sure the connections are in good working order and

the insulation is intact.

• Screw the spark plug back in again.

• Always press the spark plug connector firmly onto

the spark plug.

• Refit the cowl to the chainsaw.

11.8 Replacing the fuel filter

We recommend having the fuel filter changed

annually by a specialised service centre.

A trained mechanic can carefully remove the fuel filter

via a wire loop through the fuel tank filler. Ensure that

the thicker part of the fuel hose on the tank wall is not

drawn into the fuel tank.

Fig. 18

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