Husqvarna 333R, Workshop Manual

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28
3
Fuel system
531 00 48-63
531 03 03-98
Setting the L needle
1. Fit the trimmer head T35 and use 2.7 mm plain cord. The
cord length should be as standard, i.e. reach the knife on the
trimmer guard.
2. Run the engine warm for about 5 minutes.
3. Turn the L-needle so that the highest speed is attained.
4. If the speed exceeds 3,700 rpm, reduce it with the aid of the
idling speed’s T-screw (T) and a carry out a new adjustment
in accordance with point 3.
5. Then turn the L-needle anticlockwise so that the speed drops
by 300 rpm.
6. Then adjust the idling speed to 2,800 rpm by turning the T-
screw.
7. When mounting the sleeve on the L needle, the needle is
turned a quarter-turn anticlockwise once the optimal setting
has been made and the sleeve is mounted so that the
needle cannot be turned anticlockwise. Now turn the L
needle back a quarter-turn.
Setting the H needle
1. Fit the trimmer head T35 and use 2.7 mm plain cord.
The cord length should be as standard, i.e. reach the
knife on the trimmer guard.
2. Run the engine warm for about 5 minutes.
3. Turn the H-needle so that the highest speed is attained.
4. Reduce the speed by 400 rpm by turning the H needle
anticlockwise. Fit the sleeve on the H needle so that it
cannot be turned anti-clockwise.
5. Then increase the speed by 200 rpm by turning the H-
needle clockwise.
NOTE!
If the cutting equipment rotates while idling the T-
screw should be turned anticlockwise until it stops
rotating.
Using a screwdriver 531 00 48-63 it is possible to make
small adjustments to the jet needles without the need of
removing the locking plugs.
H
L
Use the tool 531 03 03-98 to dismantle the locking plugs
(left-hand threads) so the needles can be screwed out,
e.g. for replacing or cleaning.