To Examine The Spark Plug; To Inspect The Augers And The Scraper Bar; To Replace The Auger Shear Pins - Husqvarna ST 424 Manual Del Usuario

To replace the battery
WARNING: Risk of electrical shock. Do
not let metal objects touch the 2 battery
terminals. This can cause a short circuit
of the battery.
1. Loosen the knob (A), then tilt the bottom of the
cover in the direction of the engine. Lift the
battery cover off the holders (B).
A
2. Disconnect the BLACK battery cable.
WARNING: The BLACK cable must
be disconnected first.
3. Disconnect the RED battery cable.
4. Loosen the nuts and remove the battery strap.
5. Carefully remove the battery from the product.
6. Install a new battery.
7. Connect the RED battery cable and tighten the
bolt.
WARNING: Risk of sparks. The RED
cable must be connected first.
8. Connect the BLACK cable and tighten the bolt.
9. Install the battery cover.
To clean the battery and the terminals
1. Remove the battery. Refer to
battery on page 18 .
2. Flush the battery with plain water and let it
become dry.
3. Clean the terminals and battery cable ends with
a wire brush until they are bright.
4. Lubricate the terminals with grease.
5. Install the battery. See
page 18 .
6. Install the battery cover.
Muffler
The muffler keeps the noise levels to a minimum and
sends the exhaust fumes away from the operator.
18
B
To replace the
To replace the battery on
Do not use the product if the muffler is missing or
defective. A defective muffler increases the noise
level and the risk of fire.
Examine the muffler regularly to make sure that it is
attached correctly and not damaged.
CAUTION: The muffler becomes very
hot during and after use and when the
engine operates at idle speed. Be careful
near flammable materials and/or fumes
to prevent fire.

To examine the spark plug

CAUTION: Always use the
recommended spark plug type. Incorrect
spark plug type can cause damage to
the product.
• 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.
• If the spark plug is dirty, clean it and make sure
that the electrode gap is correct, see
data on page 28 .
• 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.
Technical
876 - 007 - 08.01.2020