To Clean The Air Filter; To Do A Check Of The Spark Plug; To Sharpen The Saw Chain - Zenoah GZ381 Manual De Usuario

To clean the air filter

Clean the air filter from dirt and dust regularly. This
prevents carburetor malfunctions, starting problems,
loss of engine power, wear to engine parts and more
fuel consumption than usual.
1. Remove the air filter cover and the air filter.
2. Use a brush or shake the air filter clean. Use
detergent and water to clean it fully.
Note:
An air filter that is used for a long time can
not be fully cleaned. Replace the air filter regularly
and always replace a defective air filter.
3. Attach the air filter and make sure that the air filter
seals tightly against the filter holder. (Fig. 102)
Note:
Because of different work conditions, weather
or season, your product can be used with different types
of air filter. Speak to your servicing dealer for more
information.

To do a check of the spark plug

CAUTION:
spark plug. Refer to
37 . An incorrect spark plug can cause
damage to the product.
1. If the product is not easy to start or to operate or if
the product operates incorrectly at idle speed,
examine the spark plug for unwanted materials. To
decrease the risk of unwanted material on the spark
plug electrodes, do these steps:
a) make sure that the fuel mixture is correct.
b) make sure that the air filter is clean.
2. Clean the spark plug if it is dirty.
3. Make sure that the electrode gap is mm/ in. (Fig.
103)
4. Replace the spark plug monthly or more frequently if
necessary.

To sharpen the saw chain

General advice on sharpening the cutting
teeth
Never use a blunt saw chain. When the saw chain is
blunt you have to exert more pressure to force the bar
through the wood and the chips will be very small. If the
saw chain is very blunt it will produce wood powder and
no chips or shavings.
A sharp saw chain eats its way through the wood and
produces long, thick chips or shavings.
The cutting part of the saw chain is called the cutter and
consists of a cutting tooth (A) and the depth gauge (B).
32
Use the recommended
Technical data on page
The cutters cutting depth is determined by the difference
in height between the two (depth gauge setting).
(Fig. 104)
When you sharpen a cutting tooth there are four
important factors to remember:
• Filing angle.
(Fig. 105)
• Cutting angle.
(Fig. 106)
• File position.
(Fig. 107)
• Round file diameter.
It is very difficult to sharpen a saw chain correctly
without the right equipment. Zenoah recommends that
you use our file gauge. This will help you obtain the
maximum kickback reduction and cutting performance
from your saw chain.
(Fig. 108)
WARNING:
sharpening instructions considerably
increases the risk of kickback.
Note:
See instructions under
37 for information about sharpening your saw chain.
To sharpen the cutting teeth
To sharpen cutting teeth you will need a round file and a
file gauge. See instructions under
page 37 for information on the size of file and gauge
that are recommended for the saw chain fitted to your
product.
1. Make sure that the saw chain is correctly tensioned.
A slack chain will move sideways, making it more
difficult to sharpen correctly. See instructions under
To tension the saw chain on page 33
2. File all teeth on one side first. File the cutting teeth
from the inside face and reduce the pressure on the
return stroke.
3. Turn the chainsaw over and file the teeth on the
other side.
4. File all the teeth to the same length. When the length
of the cutting teeth is reduced to 4 mm (5/32") the
saw chain is worn out and should be replaced. (Fig.
109)
General information about how to adjust the
depth gauge setting
The depth gauge setting (C) decreases when you
sharpen the cutting tooth (A). To keep maximum cutting
performance you must remove filing material from the
depth gauge (B) to receive the recommended depth
Technical data on page 37 for
gauge setting. See
Departure from the
Technical data on page
Technical data on
272 - 009 - 21.06.2021