Husqvarna IZ 21 Manuel D’Utilisation

English-

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9.

Connect BLACK grounding cable to 
negative (-) battery terminal with 
remaining hex bolt and hex nut.

10. Fit the terminal guard.

11. Lower seat.

The engine is equipped with an electronic 
ignition system. Only the spark plugs require 
maintenance.

For recommended spark plugs, see Technical 
Data.

1.

Remove the ignition cable boot and clean 
around the spark plug.

2.

Remove the spark plug with a spark plug 
socket wrench.

3.

Check the spark plug. Replace the spark 
plug if fouled, the electrodes are burned 
and if the insulation is cracked or 
damaged. Clean the spark plug with a 
steel brush if it is to be reused.

4.

Measure the electrode gap with a 
gapping tool. The gap should be .030  
(0.75 mm).  Adjust as necessary by 
bending the side electrode.

5.

Reinsert the spark plug, turning by hand 
to avoid damaging the threads.

6.

After the spark plug is seated, tighten it 
using a spark plug wrench so that the 
washer is compressed. A used spark 
plug should be turned 1/8 of a turn from 
the seated position. A new spark plug 
should be turned 1/4 a turn from the 
seated position.

7.

Replace the ignition cable.

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