Husqvarna 331R Operator's Manual page 8

protective equipment does not erase the risk of
injury. The personal protective equipment decreases
the grade of injury if an accident occurs.
• Always use an approved eye protection while you
operate the product.
• Do not operate the product with bare feet or with
open shoes. Always use heavy-duty slip-resistant
boots.
• Use heavy, long pants.
• If it is necessary, use approved protective gloves.
• Use a helmet if it is possible that objects fall on your
head.
• Always use approved ear protection while you
operate the product. Noise for a long period can
cause noise-induced hearing loss.
• Make sure that you have a first aid kit near.
Protective devices on the product
• Make sure that you regularly do the maintenance to
the product.
• The life of the product increases.
• The risk of accidents decreases.
Let an approved dealer or an approved service
center regularly examine the product to do
adjustments or repairs.
• Do not use a product with damaged protective
equipment. If the product is damaged, speak to an
approved service center.
Throttle trigger lockout
The throttle trigger lockout (A) prevents accidental
operation of the throttle trigger (B). Push the throttle
trigger lockout (A) to release the throttle trigger (B).
When you release the handle, the throttle trigger lockout
(A) and the throttle trigger (B) go back to their initial
positions.
(Fig. 17)
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.
8
(Fig. 18)
Cutting attachment guard
WARNING:
attachment without an approved guard. If an
incorrect or damaged 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.
(Fig. 19)
To do a check of the quick-release mechanism
WARNING:
a quick-release mechanism that does not
operate correctly.
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. (Fig. 20)
Muffler
(Fig. 21)
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.
To attach and remove the locknut
WARNING:
protective gloves and be careful around the
sharp edges of the cutting attachment.
Do not use a cutting
Do not use a harness with
Stop the engine, use
1544 - 005 - 03.04.2023