Troubleshooting - Husqvarna K 770 Operator's Manual

4. Clean as necessary.
Problem
The product does not start.
The cutting blade rotates at
idle speed.
The cutting blade does not
rotate when the operator
throttles up.
The product has no power
when the operator tries to
throttle up.
The vibration levels are too
high.
1447 - 001 - 16.04.2020

Troubleshooting

Cause
The start procedure is done incor-
rectly.
The stop switch in the right (STOP)
position.
There is no fuel in the fuel tank.
The spark plug is defective.
The clutch is defective.
The idle speed is too high.
The clutch is defective.
The belt is too loose or defective.
The clutch is defective.
The cutting blade is installed incor-
rectly.
The air filter is clogged.
The fuel filter is clogged.
The fuel tank flow is blocked.
The cutting blade is installed incor-
rectly.
The cutting blade is defective.
A vibration damping unit is defective.
Possible solutions
To start the product with a cold en-
Refer to
gine on page 22 and To start the product
with a warm engine on page 23 .
Make sure that the stop switch (STOP) is in
the left position.
Fill with fuel.
Replace the spark plug.
Speak to your service agent.
Adjust the idle speed.
Speak to your service agent.
Tighten the belt or replace the belt with a
new one.
Speak to your service agent.
Make sure that the cutting blade is correctly
installed.
Examine the air filter. If it is necessary, re-
place it.
Replace the fuel filter.
Speak to your service agent.
Make sure that the cutting blade is correctly
installed and that it is not damaged. Refer to
To install the cutting blade on page 15 .
Replace the cutting blade and make sure
that it is not damaged.
Speak to your service agent.
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