Husqvarna 331R Operator's Manual page 6

Two isolated return springs control this movement. This
means that the throttle trigger (B) is automatically locked
at the idle position.
1. Make sure that the throttle trigger (B) is locked at idle
when you release the throttle trigger lockout (A).
2. Push the throttle trigger lockout (A) and make sure
that it goes back to its initial position when you
release it.
3. Push the throttle trigger (B) and make sure that it
goes back to its initial position when you release it.
Start the engine, and then apply full throttle. Release the
throttle trigger (B) and examine if the cutting attachment
stops. If the cutting attachment turns with the throttle in
the idle position, examine the idle adjustment screw of
the carburetor.
Stop switch
Start the engine. Make sure that the engine stops when
you move the stop switch to the stop position.
Cutting attachment guard
WARNING: Do not use a cutting attachment
without an approved guard. If an incorrect or
defective guard is installed, this can cause
damage to persons.
The cutting attachment guard prevents a loose object to
eject in the direction of the operator. Examine the cutting
attachment guard for damage and replace if it is
damaged. Only use the approved guard for the cutting
attachment.
6
To do a check of the quick-release mechanism
WARNING: Do not use a harness with a
defective quick-release mechanism.
The quick-release mechanism lets the operator remove
the product quickly from the harness if there is an
emergency.
1. Stop the engine.
2. Do a visual check for damage, for example cracks.
3. Release and attach the quick-release mechanism to
make sure that it operates correctly.
Muffler
The muffler keeps the noise level to a minimum and
keeps exhaust fumes away from the operator.
• Do not use an engine with a damaged muffler. A
damaged muffler increases the noise level and the
risk of fire. Keep a fire extinguisher near.
• Examine regularly that the muffler is attached to the
product.
• Do not touch the engine or the muffler when then
engine is on. Do not touch the engine or the muffler
for a while after the engine stops. Hot surfaces can
cause injuries.
• A hot muffler can cause a fire. Be careful, if you use
the product near flammable liquids or fumes.
• Do not touch the parts in the muffler, if the muffler is
damaged. The parts can contain some carcinogenic
chemicals.
1158 - 005 - 26.03.2020