Troubleshooting - Husqvarna 435 Operator's Manual

The engine does not start
Product part to examine
Starter pawls
Fuel tank
Ignition, no spark
Spark plug and cylinder
The engine starts but stops again
Product part to examine
Fuel tank
Carburetor
Air filter
Fuel filter
28

Troubleshooting

Possible cause
The starter pawls are blocked.
Incorrect fuel type.
The fuel tank is filled with chain oil.
The spark plug is dirty or wet.
The electrode gap is incorrect.
The spark plug is loose.
Engine is flooded because of repea-
ted starts with full choke after igni-
tion.
Possible cause
Incorrect fuel type.
The idle speed is not correct.
Clogged air filter.
Clogged fuel filter.
Action
Adjust or replace the starter pawls.
Clean around the pawls.
Speak to an approved service work-
shop.
Drain the fuel tank and fill with cor-
rect fuel.
If you have tried to start the product,
speak to your servicing dealer. If you
have not tried to start the product,
drain the fuel tank.
Make sure that the spark plug is dry
and clean.
Clean the spark plug. Make sure that
the electrode gap and spark plug is
correct, and that the correct spark
plug type is the recommended or
equivalent.
Technical data on page 29
Refer to
for the correct electrode gap.
Tighten the spark plug.
Remove and clean the spark plug.
Put the product on its side with the
spark plug hole away from you. Pull
the starter rope handle 6-8 times. As-
semble the spark plug and start the
To start the product
product. Refer to
on page 17 .
Action
Drain the fuel tank and fill with cor-
rect fuel.
Speak to your servicing dealer.
Clean or replace the air filter.
Replace the fuel filter.
1270 - 005 - 21.06.2021