Husqvarna P 520DX Operator's Manual page 53

Problem
The engine does not run smoothly
The engine overheats
The product release black smoke
The product release blue smoke
The product release white smoke
The engine apparently has no power
1593 - 002 - 22.12.2020
Cause
The fuel filter is clogged. Refer to
The air filter is clogged. Refer to
37 .
The fuel tank vent is blocked.
The feed pressure is too low.
The injector pipe is loose.
The engine is defective.
There is incorrect fuel type in the fuel tank.
The relief valve is defective.
The fuel injector is defective.
The injection pump is defective.
The feed pump is defective.
The cold air intake or the cooling fins are blocked.
The engine is overloaded.
The coolant level is too low.
The engine oil level is too low.
There is incorrect fuel type in the fuel tank.
The air filter is clogged. Refer to
37 .
The injection pump is defective.
The fuel injector is defective.
The engine oil level is too high.
The engine is defective.
The cylinder in the engine is defective.
The engine oil level is too high.
The air filter is clogged. Refer to
37 .
The fuel filter is clogged. Refer to
There is air in the fuel system.
The relief valve is defective.
The feed pressure is too low.
The feed pump is defective.
The timing of the fuel injection pump is defective.
The engine is defective.
To replace the fuel filters on page 36 .
To clean and replace the air filter on page
To clean and replace the air filter on page
To clean and replace the air filter on page
To replace the fuel filters on page 36 .
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