Throttle - Husqvarna 343R, 345RX, 343F, 345FX, 345FXT Workshop Manual

Carburettor adjustment 345RX/FX
Adjusting the L-needle
1. Mount the Trimmy Fix (4 wires) and use 3.3 mm smooth
cord. The cord length should be 160 mm measured from the
end of the cord to the cord bushing on the trimmer head.
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 plastic sleeve on the L-needle, the
needle is turned a quarter-turn anticlockwise once the
optimal setting has been made and the plastic sleeve is
mounted so that the needle cannot be turned anticlockwise.
Then turn the L-needle back a quarter-turn.
Fuel system
Carburettor adjustment 345RX/FX
Adjusting the H-needle
1. Mount the Trimmy Fix (4 wires) and use 3.3 mm smooth
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
5. Then increase the speed by 200 rpm by turning the H-
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Throttle

Disassemble the cable protector (B),
the cover (D) and the throttle from the
handle.
Remove the bolts and separate the two
halves of the throttle.
502 50 18-01
cord. The cord length should be 160 mm measured from
the end of the cord to the cord bushing on the trimmer
head.
anticlockwise. Mount the plastic sleeve on the H-needle
so that it cannot be turned anticlockwise.
needle clockwise.
NOTE!
If the cutting equipment rotates while idling the T-
screw should be turned anticlockwise until it stops
rotating.
Carburettor needles with Zama "caps".
Throttle
Remove the bolt (A) and cable protec-
tor (B).
Remove the two bolts (C) and the cover
(D).
Remove the bolt (E) that attaches the
throttle to the handle and remove the
throttle.
Remove the bolts and separate the two
halves of the throttle.
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