Troubleshooting - Husqvarna K 770 Operator's Manual

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.
The temperature of the prod-
uct is too high.
The engine decreases in
power or in speed.
There is much dust during
operation. You can see dust
in the air.
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.
The air intake or the cylinder flanges
are blocked.
The drive belt tension is not suffi-
cient.
The clutch is defective.
The air filter is clogged.
The water supply or water pressure
is not sufficient.
Possible solutions
To start the product with a cold en-
Refer to
gine on page 23 and To start the product
with a warm engine on page 25 .
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 16 .
Replace the cutting blade and make sure
that it is not damaged.
Speak to your service agent.
Clean the air intake and the cylinder flanges.
Examine the belt. Adjust the tension.
Always cut at full throttle.
Examine the clutch. Speak to your service
agent.
Examine the air filter. Refer to
servicing of the air filter on page 31 .
Do a check of the water supply to the prod-
uct.
To do a check of the water supply
Refer to
system on page 32 .
To do the
33