Maintenance And Care; Carburetor Adjustment - AL-KO BC 250 User Manual

Maintenance and care

Changing cutting string
Caution!
Injury danger!
Do not use metal wire or plastic-sheathed metal wire in
the string head.
1. Remove star screw (A) (Illustration 9A).
2. Remove string spool (B) and spring (C) from the
spindle (D).
3. Remove remaining cutting string (H).
4. Insert new cutting string (length: 4.3m [14"], Ø: 2mm
[080"]) with the looped end in the slit on the string
spool (Illustration 9B).
5. Wind up the cutting string firmly in a clockwise
direction (Illustration 9C). Make sure that both string
halves are found in the respective spool housings.
Wind up string until 15 cm, [6"] of string length remain.
6. Direct one end of the cutting string (H) through
an opening (F) on the opposite side of the spool
(Illustration 9D).
7. Direct spring (C) over the spindle (D) and thread the
string ends through the eyelets (G) in the housing (E).
(Illustration 9E).
8. Direct the spool into the housing (E) and
simultaneously pull the string ends through the
eyelets (G). Observe the correct position of the spring
(C) to the spool (D) and the housing (Illustration 9E).
9. Press the spool securely into the housing - spring is
tensioned. Pull securely on both ends of the string
(H), so that it is not jammed (Illustration 9F).
10. Maintain spring tension by constant pressure to the
spool in the housing, and tighten the screw sturdily
(Illustration 9G).
11. Shorten the string line to approximately 13 cm (5"),
in order not to overload the motor in the start/warm-
up phase.
470 007_d
(Illustration 9 A-F)
Air filter
(Illustration10)
Caution!
Never operate the device without an air filter. Clean the
air filter regularly. Replace damaged air filter.
1. Remove star screw (A), take off cover (B) and take
out air filter (C).
2. Clean air filter with soap and water. Do not use
gasoline!
3. Allow air filter to dry.
4. Install air filter in reverse sequence.
Fuel Filter
(Illustration 11 A-C)
Caution!
Never operate the device without an air filter. Severe
motor damage can result.
1. Take tank cap (A) completely off.
2. Empty remaining fuel into a suitable container.
3. Pull out filter from tank with a wire hook (B).
4. Pull out filter (C) with a twisting movement.
5. Replace filter (C) .

Carburetor Adjustment

The carburetor is optimally set at the factory.
Sparkplug
(Illustration 12)
Sparkplug electrode gap = 0.635 mm [0.025"].
1. Remove sparkplug with a torque of 12-15 nm.
2. Install spark plug connector on spark plug.
Sharpening string-cutting blade
1. Loosen cutting blade (A) from protective shield (B).
2. Secure cutting blade in a vise and sharpen with a flat
file. Only file in one direction.
GB
(Illustration 13)
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