Operation - Husqvarna 331R Operator's Manual

4. Adjust the side straps to make the product weigh
equally on your shoulders.
5. Adjust the harness until the cutting attachment is
parallel to the ground.
WARNING: Read and understand the safety
chapter before you operate the product.
Fuel
To use fuel
CAUTION: This product has a two-cycle
engine. Use a mixture of gasoline and two-
cycle engine oil. Make sure to use the
correct quantity of oil in the mixture.
Incorrect ratio of gasoline and oil can cause
damage to the engine.
Gasoline
CAUTION: Do not use gasoline with an
octane number less than 90 RON (87 AKI).
This can cause damage to the product.
CAUTION: Do not use gasoline with more
than 10% ethanol concentration (E10). This
can cause damage to the product.
12
6. Let the cutting attachment lightly touch the ground.
Adjust the harness clamp to balance the product
correctly.
Note: If you use a grass blade, it must balance
approximately 10 cm /4 in above the ground.

Operation

• Always use new unleaded gasoline with a minimum
octane number of 90 RON (87 AKI) and with less
than 10% ethanol concentration (E10).
• Use gasoline with a higher octane number if you
frequently use the product at continuously high
engine speed.
Two-cycle engine oil
• Use only the two-cycle engine oil of high quality,
especially HUSQVARNA two-cycle oil. Use only the
oil of an air cooled engine.
• Mixture ratio 50:1 (2%).
• Oil of low quality and high oil/fuel ratio can decrease
the lifetime of catalytic converters.
• Speak to your dealer when you select an oil.
• If Husqvarna two-stroke oil is not available, you can
use another two-stroke oil of good quality that is
intended for air cooled engines. Contact your dealer
when you select oil.
• Do not use the two-stroke oil for water-cooled
outboard engines. The two-stroke oil is sometimes
referred to as outboard oil.
Gasoline, liter Oil, liter
2%(50:1)
1158 - 005 - 26.03.2020