Husqvarna P 535HX Operator's Manual page 61

Problem
The engine does not run smooth-
ly.
The engine is too hot.
The product releases black
smoke.
The product releases blue
smoke.
The product releases white
smoke.
The engine apparently has no
power.
The 12 V battery does not
charge.
1591 - 005 - 20.05.2021
Cause
The fuel filter is clogged. Refer to
The air filter is clogged. Refer to
The fuel tank venting is blocked.
The fuel pressure is too low.
The fuel injection pipe is loose.
There is water in the fuel.
The engine is defective.
There is incorrect fuel type in the fuel tank.
The fuel injector is defective.
The fuel injection pump is defective.
The fuel pump is defective.
The cold air intake or the cooling fins are blocked.
The engine has too high load.
The coolant level is too low.
The engine oil level is too low.
The fuel injector is defective.
The fuel injection pump is defective.
The air filter is clogged. Refer to
There is incorrect fuel type in the fuel tank.
The engine oil level is too high.
The engine is defective.
The cylinder in the engine is defective.
Coolant water enters into the combustion chamber.
The air filter is clogged. Refer to
The fuel filter is clogged. Refer to
There is air in the fuel system.
The fuel pressure is too low.
The fuel pump is defective.
The fuel injection pump is not synchronized.
The engine is defective.
The 12 V battery is defective. Speak to your Husqvarna service agent.
The connection at the cable connectors on the 12 V battery terminals is bad.
The DC/DC charger is defective.
The 12 V generator is defective
To replace the fuel filters on page 52 .
To clean and replace the air filter on page 50 .
To clean and replace the air filter on page 50 .
To clean and replace the air filter on page 50 .
To replace the fuel filters on page 52 .
61