Problem
Cause
Possible solutions
The product does not start.
The start procedure is done incor-
rectly.
Refer to
To start the product with a
cold engine on page 19
and
To start
the product with a warm engine on
page 20
.
The stop switch is in the right (STOP)
position.
Make sure that the stop switch
(STOP) is in the left position.
There is no fuel in the fuel tank.
Fill with fuel.
The spark plug is defective.
Replace the spark plug.
The clutch is defective.
Speak to your service agent.
The cutting blade rotates at idle
speed.
The idle speed is too high.
Adjust the idle speed.
The clutch is defective.
Speak to your service agent.
The cutting blade does not rotate
when the operator throttles up.
The belt is too loose or defective.
Tighten the belt or replace the belt
with a new one.
The clutch is defective.
Speak to your service agent.
The cutting blade is installed incor-
rectly.
Make sure that the cutting blade is
correctly installed.
The product has no power when the
operator tries to throttle up.
The air filter is clogged.
Examine the air filter. If it is necessa-
ry, replace it.
The fuel filter is clogged.
Replace the fuel filter.
The fuel tank flow is blocked.
Speak to your service agent.
The vibration levels are too high.
The cutting blade is installed incor-
rectly.
Make sure that the cutting blade is
correctly installed and that it is not
damaged. Refer to
Correct cutting
blades on page 13
.
The cutting blade is defective.
Replace the cutting blade and make
sure that it is not damaged.
A vibration damping unit is defective. Speak to your service agent.
The temperature of the product is too
high.
The air intake or the flanges that de-
crease the temperature is blocked.
Clean the air intake and the flanges
that decrease the temperature.
The belt moves.
Examine the belt. Adjust the tension.
The clutch is defective.
Always cut at full throttle.
Examine the clutch. Speak to your
service agent.
The engine decreases in power or in
speed.
The air filter is clogged.
Examine the carburetor. Refer to
To
examine the carburetor on page 26
The dust is not collected properly
during cutting.
Improper cutting technique.
Refer to
Basic working techniques on
page 17
.
The attached dust extractor is not ex-
tracting dust.
Refer to Operator´s manual of the
dust extractor.
28
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Summary of Contents for K 770 Vac
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