Tuning Minimum Speed; Tuning The Carburettor; Guide Bar Maintenance; Storing The Machine - Stiga SP 386 Manual De Instrucciones

5. Insert the file in the tooth at a constant
angle from the cutting edge (Fig.
42.B). Using a sharpening plate makes
using the file easier (Fig. 42.C).
6. Sharpen in a forward motion a few times
and repeat this on all the cutting edges
facing the same way (right or left).
7. Turn the bar over in the vice and repeat
on all the other cutting edges.
8. Check that the limiter tooth (Fig. 42.D)
complies with the levels indicated in
the "Chain Maintenance Table" (chap.
14) and file any projecting parts with
a flat file, rounding off the edge.
9. After sharpening, remove all traces of filing
and dust and lubricate the chain in an oil bath.
8.7.2 Replacing the toothed chain
Replace the chain when:
– the length of the cutting edges
reduces to 5 mm or less (Fig. 42.E);
– there is too much play between
the links and the rivets.
– the cutting speed is too slow and the
repeated sharpening does not improve
the cutting speed. The chain is worn.
IMPORTANT After replacing the chain,
its tension level must be checked more
frequently due to settling of the chain.

8.8 GUIDE BAR MAINTENANCE

NOTE Any work on the guide bar requires
specific experience and special tools in order
to achieve top workmanship standards; for
safety purposes, we recommend you contact
your dealer to ensure work is done correctly.
To avoid asymmetrical wear on the bar,
make sure it is turned over periodically.
To keep the bar in perfect working
order, proceed as follows:
1. grease the bearings on the nose sprocket
(if present) with the syringe (not included).
2. clean the bar groove with the scraper
(not included) (Fig. 43.A);
3. clean the lubrication holes (Fig. 43.B);
4. with a flat file (not included), remove burr
from the edges and level off the guides.
8.8.1 Replacing the bar
Replace the bar whenever:
– the groove is not as deep as the
height of the drive links (which
must never touch the bottom);
– the inside of the guide is worn enough
to make the chain lean to one side.

8.9 TUNING MINIMUM SPEED

If the cutting means moves when
the engine is running idle, contact
your dealer to have the engine
adjusted correctly (par. 8.11).

8.10 TUNING THE CARBURETTOR

The carburettor is tuned by the manufacturer
to achieve maximum performance in all
situations, with a minimum emission of toxic gas
in compliance with the regulations in force.
In the event of poor performance, contact your
Dealer for a check of the carburetion and engine.
Carburettor tuning:
T = tuning minimum speed
L = low speed mixture tuning
H = high speed mixture tuning

9. STORING THE MACHINE

IMPORTANT The safety regulations to
follow for putting into storage are described
in paragraph 2.4. Strictly comply with these
instructions to avoid serious risks or hazards.
If you are not going to use the machine
for a period of more than 2-3 months, we
recommend you do a few things before putting
it away. This will make it easier when you
want to use the machine again and will also
prevent permanent damage to the engine.
Before putting the machine away:
1. Unscrew the two clutch housing nuts, remove
the housing and remove the chain and bar.
2. Empty the oil tank, fill with about 100-120 cc
of specific liquid detergent and plug the cap.
3. Fit the guard back on without
tightening the nuts.
4. Start the engine and keep it running
until all detergent is used.
5. Start the engine and run it idle until
it uses up all the fuel that is left in
the tank and the carburettor.
6. Wait for the engine to cool.
7. Remove the spark plug.
EN - 16