Husqvarna 235 Istruzioni per il montaggio
Model 225, 232, 235
Basic adjustment ofcarburetor (CARB)
After replacing the needles or complete carburetor on a CARB certified product, a basic
edjustment must be carried out as described below in order to meet the CARB -requirements.
After replacement of completecarburetor
1. Check that the H cap is adjusted to its richest setting. (Turned counterclockwise to stop.)
The cap is not fixed to the needle, but can be rotated independently.
Do not adjust the L needle. This needle is set at the factory and the cap is already fitted.
2. Fit 4 trimmer fines, diameter 3.3 mm (0.13 inch) to a Trimmy Fix.
(Trimmy Fix M10, 531 00 38-69, for 225 and 232. Trimmy Fix M12, 502 13 87-02, for 235.)
It may be necessary to drill out the holes in the Trimmy Fix to make it easier to fit the
trimmer fines.
3. Cut the trimmer fines to correct lenght (measured from the outer edge of the Trimmy Fix):
225 145 mm (5.7 inches)
232: 155 mm (6.1 inches)
235: 170 mm (6.7 inches)
Fit the Trimmy Fix on the machine. Note! For 235 the sprayguard must be removed. Be
aware of the fines.
4. Start the engine. If necessary, adjust the idle speed with the T -screw.
5. Using a narrow blade screwdriver inserted through the hole in the cap (max. blade width 2
mm, 0.08 inch) adjust the H needle to give a top speed of 8400 ±200 rpm.
6. Let the engine run for 2-3 minutes until warm.
7. Check that the top speed is still 8400
±
200 rpm. Readjust if necessary.
8. Check that the H cap is still adjusted to its richest setting. (Turned counterclockwise to stop).
9. Gently knock the H cap into position. Use a 5 mm (0.2 inch) mandrel or the locking pin for
the gear, 502 02 61-03.
This is a basic carburetor adjustment. Further fine adjustments, within the limits the caps
allows, may be necessary to achieve optimum performance. See the operator's manual.
04-96 1 (5) SSG04006.PDF
After replacement of only H-needle
1. Adjust the L-needle to its richest setting. (Toured counterclockwise to stop.)
2. Take off the cap from the H -needle using e. g. a pair of cutting pliers and unscrew the
needle.
3. Screw the new H-needle to the bottom and then turn it counterclockwise 1/2 turn.
4. Press a new H-cap on the H-needle to the first stop, which means that the cap is not fixed to
the needle, but can be rotated separately.
5. Adjust the H-cap to the richest position without turning the needle. (Turned
counterclockwise to stop.)
6. Fit 4 trimmer fines, diameter 3.3 mm (0.13 inch) to a Trimmy Fix.
(Trimmy Fix M10, 531 00 38-69, for 225 and 232. Trimmy Fix M12, 502 13 87-02, for 235.)
It may be necessary to drill out the holes in the Trimmy Fix to make it easier to fit the
trimmer fines.
7. Cut the trimmer fines to correct lenght (measured from the outer edge of the Trimmy Fix):
225: 145 mm (5.7 inches)
232: 155 mm (6.1 inches)
235: 170 mm (6.7 inches)
Fit the Trimmy Fix on the machine. Note! For 235 the sprayguard must be removed. Be
aware of the fines.
8. Start the engine. If necessary, adjust the idle speed with the T -screw.
9. Using a narrow blade screwdriver inserted through the hole in the cap (max. blade width 2
mm, 0.08 inch) adjust the H needle to give a top speed of 8400 ±200 rpm.
10. Let the engine run for 2-3 minutes until warm.
11. Check that the top speed is still 8400
±
200 rpm. Readjust if necessary.
12 Check that the H cap is still adjusted to its richest setting. (Turned counterclockwise to
stop).
13. Gently knock the H cap into position. Use a 5 mm (0.2 inch) mandrel or the locking pin for
the gear, 502 02 61-03.
This is a basic carburetor adjustment. Further fine adjustments, within the limits the caps
allows, may be necessary to achieve optimum performance. See the operator's manual.
04-96 2 (5) SSG04006.PDF
After replacement of only L-needle
1. Adjust the H-needle to the leanest position. (Turned clockwise to stop.)
2. Take off the cap from the L -needle using e. g. a pair of cutting pliers and unscrew the
needle.
3. Screw the new L-needle to the bottom and then turn it counterclockwise 2 turns.
4. Press a new L-cap on the L-needle to the first stop, which means that the cap is not fixed
to the needle, but can be rotated separately.
5. Adjust the L-cap to the leanest position without turning the needle. (Turned clockwise to
stop.)
6. Start the engine and let it run on idle.
7. Using a narrow blade screwdriver inserted through the hole in the cap (max. blade width 2
mm, 0.08 inch) adjust the L -needle until highest possible idlespeed is achieved.
8. Check that the L-cap is still adjusted to its leanest position. (Turned clockwise to stop.)
9. Gently knock the L-cap into position. Use a 5 mm (0.2 inch) mandrel or the locking pin for
the gear, 502 02 61-03.
This is a basic carburetor adjustment. Further fine adjustments, within the limits the caps
allows, may be necessary to achieve optimum performance. See the operator's manual.
04-96 3 (5) SSG04006.PDF
After replacement of both H-needle and L-needle
1. Take off the caps from both needles using e. g. a pair of cutting pliers and unscrew the
needles.
2. Screw the new L-needle to the bottom and then turn it counterclockwise 2 turns.
Screw the new H-needle to the bottom and then turn it counterclockwise 1/2 turns.
3. Press new caps on the needles to the first stop, which means that the caps are not fixed
to the needles, but can be rotated separately.
4. Adjust the L-cap to the leanest position without turning the needle. (Turned clockwise to stop.)
5. Start the engine and let it run on idle.
6. Using a narrow blade screwdriver inserted through the hole in the cap (max. blade width 2
mm, 0.08 inch) adjust the L -needle until highest possible idlespeed is achieved.
7. Check that the L-cap is still adjusted to its leanest position. (Turned clockwise to stop.)
8. Gently knock the L-cap into position. Use a 5 mm (0.2 inch) mandrel or the locking pin for
the gear, 502 02 61-03. Turn the L -needle to the richest position. (Turned
counterclockwise to stop.)
9. Adjust the H-cap to the richest position without turning the needle. (Turned
counterclockwise to stop.)
10. Fit 4 trimmer fines, diameter 3.3 mm (0.13 inch) to a Trimmy Fix.
(Trimmy Fix M10, 531 00 38-69, for 225 and 232. Trimmy Fix M12, 502 13 87-02, for 235.)
It may be necessary to drill out the holes in the Trimmy Fix to make it easier to fit the
trimmer fines.
11. Cut the trimmer fines to correct lenght (measured from the outer edge of the Trimmy Fix):
225: 145 mm (5.7 inches)
232: 155 mm (6.1 inches)
235: 170 mm (6.7 inches)
Fit the Trimmy Fix on the machine. Note! For 235 the sprayguard must be removed. Be
aware of the fines.
04-96 4 (5) SSG04006.PDF
12. Start the engine.
13. Using a narrow blade screwdriver inserted through the hole in the cap (max. blade width 2
mm, 0.08 inch) adjust the H needle to giv e a top speed of 8400 ±200 rpm.
14. Let the engine run for 2-3 minutes until warm .
15. Check that the top speed is still 8400
±
200 rpm. Readjust if necessary.
16. Check that the H cap is still adjusted to its richest setting. (Turned counterclockwise to
stop).
17. Gently knock the H cap into position. Use a 5 mm (0.2 inch) mandrel or the locking pin for
the gear, 502 02 61-03.
This is a basic carburetor adjustment. Further fine adjustments, within the limits the caps
allows, may be necessary to achieve optimum performance. See the operator's manual.
04-96 5 (5) SSG04006.PDF
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4
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