Husqvarna ST 224 Operator's Manual page 17

• If the spark plug is dirty, clean it and make sure that
the electrode gap is correct, see
page 25 .
• Replace the spark plug if it is necessary.
To inspect the augers and the scraper
bar
1. Before each use, inspect the augers and the scraper
bar for wear.
2. If the edge of the scraper bar is worn, reverse the
scraper bar. If the scraper bar has damages or is
worn on both edges, replace it.
3. If the edges of the augers are worn, contact an
authorized service center to replace them.
To replace the auger shear pins
The auger shear pins protect the product from damage.
The auger shear pins break if an object comes into the
moving parts.
CAUTION: Use only original equipment
shear pins supplied with the product.
1. If an auger shear pin breaks, stop the engine and
wait for the moving parts to stop.
2. Remove the ON/OFF key and disconnect the spark
plug cable.
3. Align the hole in the auger hub (B) with the hole in
the auger shaft (C) and install a new ¼ - 20 x 2
shear pin (A)
673 - 003 - 08.01.2020
Technical data on
4. Install a ¼-20 locknut (D) and tighten.
B
5. Put the ON/OFF key in the ignition and connect the
spark plug cable to the spark plug.
To replace the impeller shear pins
The impeller shear pins protect the product from
damage. The impeller shear pins break if an object
comes into the moving parts.
CAUTION: Use only original equipment
shear pins supplied with the product.
1. If an impeller shear pin breaks, stop the engine and
wait for the moving parts to stop.
2. Remove the ON/OFF key and disconnect the spark
plug cable.
3. Align the hole in the impeller hub (A) with the holes
in the impeller shaft (B) and install a new ¼-20 shear
pin (C).
A B
C
D
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