Operation; To Do A Function Check Before You Use The Product; Premixed Fuel; To Mix Fuel - Husqvarna 439 Manual Del Usuario

5. Align the hole in the guide bar with the chain adjuster
pin and install the clutch cover.
Introduction
WARNING: Read and understand the safety
chapter before you use the product.
To do a function check before you
use the product
1. Make sure that the chain brake operates correctly
and that it is not damaged.
2. Make sure that the right hand guard is not damaged.
3. Make sure that the throttle lockout operates correctly
and that it is not damaged.
4. Make sure that the start/stop switch operates
correctly and that it is not damaged.
5. Make sure that there is no oil on the handles.
6. Make sure that the vibration damping system
operates correctly and that it is not damaged.
7. Make sure that the muffler is correctly attached and
that it is not damaged.
8. Make sure that all parts of the product are correctly
attached and not damaged or missing.
9. Make sure that the chain catcher is correctly
attached.
10. Do a check of the saw chain tension.
3 4
6,8
2
10
10
7
1 9
6. Tighten the bar nuts finger tight.
7. Tighten the saw chain. Refer to
of the saw chain on page 30 for instructions.
8. Tighten the bar nut.
Note: If the clutch cover is not easy to remove,
tighten the bar nut, engage the chain brake and
release. A click is heard if it is released correctly.

Operation

Fuel
This product has a two-stroke engine.

Premixed fuel

• Use Husqvarna premixed alkylate fuel of a good
quality, for best performance and extension of the
engine life. This fuel contains less harmful chemicals
compared to regular fuel, which decreases harmful
exhaust fumes. The quantity of remains after
combustion is lower with this fuel, which keeps the
components of the engine more clean.

To mix fuel

Gasoline
• Use good quality unleaded gasoline with a maximum
of 10% ethanol contents.
• We recommend that you use gasoline of a higher
octane grade for work with continuously high rpm.
Two-stroke oil
• For best results and performance use Husqvarna
two-stroke oil.
• If Husqvarna two-stroke oil is not available, use a
two-stroke oil of good quality for air-cooled engines.
Speak to your servicing dealer to select the correct
oil.
CAUTION: Incorrect type of fuel can result
in engine damage. Use a mixture of gasoline
and two-stroke oil.
CAUTION: Do not use gasoline with an
octane grade less than 90 RON/87 AKI.
Use of a lower octane grade can cause
engine knocking, which causes engine
damages.
To adjust the tension
823 - 005 -