Ignition System - Husqvarna 555 Workshop Manual
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Also See for 555:
- Operator's manual (92 pages) ,
- User manual (60 pages) ,
- Workshop manual (59 pages)
Table of Contents
7. Pull the starter rope to make it straight, remove your
thumb and let the starter rope wind up.
8. Attach the cooling air conductor (E) and the starter
unit (F) on the crankcase. Pull the starter rope lightly
to make sure that the starter pulley is attached
correctly against the crankcase. Tighten the 4
screws (G) to the correct torque. Refer to
data on page 7 .
E
F
G
7.9 Ignition system
7.9.1 To do a spark test
1. Remove the spark plug from the cylinder.
2. Connect the spark plug to the spark plug cap.
3. Make sure that the stop switch on the throttle handle
is in the start position.
4. Hold the spark plug against the cylinder and pull the
starter rope handle. If the ignition operates correctly,
you will see a spark between the electrodes on the
spark plug.
WARNING: To prevent the risk of fire, do
not hold the spark plug near the spark plug
hole.
28 - Repair instructions
5. If no spark occurs, remove the spark plug and
connect the ignition tester (A) to the spark plug cap
(B). Refer to
B
6. Connect the ground cable (C) to 1 of the cooling fins
on the cylinder.
7. Use the knob (D) to adjust the distance between the
2 electrodes to 6 mm.
Note: One mark on the scale is 1 mm.
Servicing
8. Pull the starter rope handle.
9. Do 1 of the steps that follow.
a) If a spark occurs between the electrodes on the
ignition tester, replace the spark plug.
b) If there is no spark between the electrodes on
the ignition tester, replace the ignition module.
Refer to
29 .
7.9.2 To examine the spark plug
CAUTION: Use resistor spark plugs to prevent
problems during operation and permanent
damage to the ignition system. Only use spark
plugs recommended by Husqvarna, refer to the
operator's manual.
•
Examine the spark plug if the engine is low on
power, is not easy to start or does not operate
correctly at idle speed.
•
To decrease the risk of unwanted material on the
spark plug electrodes, obey these instructions:
a) Make sure that the idle speed is correctly
adjusted.
b) Make sure that the fuel mixture is correct.
c) Make sure that the air filter is clean.
Servicing tools on page 9 .
A
C
To remove the ignition system on page
D
1540 - 001 -
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Troubleshooting
