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Petrol-powered Hedge Trimmer support
Hedge trimmer starts then dies? Causes and quick fixes
If your hedge trimmer starts but stops after a few seconds, the engine is usually not getting the correct balance of fuel, air or ignition.
Use the steps below to quickly find the cause and fix the problem.
Quick check
Before going into detailed troubleshooting:
Is there fresh fuel in the tank?
Is the air filter clean?
Is the choke in the correct position after starting?
If the issue remains, follow the guide below.
Step-by-step troubleshooting
Learn how to troubleshoot the issue
Old or incorrect fuel
Most common cause
Fuel older than 30 days can cause poor performance and stalling.
What to do:
Empty the fuel tank
Refill with fresh, recommended fuel mix
Restart the product
Tip: Always empty fuel before long-term storage.
Dirty air filter
A clogged air filter restricts airflow and can cause the engine to stop shortly after starting.
What to do:
Remove the air filter
Fuel flow issues
If fuel cannot reach the engine properly, the trimmer may start and then die.
Check for:
Blocked fuel filter
Cracked or clogged fuel lines
Dirty carburettor
What to do:
Replace the fuel filter if needed
Inspect fuel lines for damage
Clean the carburettor if necessary
Faulty or worn spark plug
The engine may start briefly but fail to keep running if the spark plug is worn.
What to do:
Remove and inspect the spark plug
Clean or replace if needed
Blocked spark arrestor
A clogged spark arrestor (in the muffler) can restrict airflow and cause stalling.
What to do:
Replace if heavily clogged
Incorrect choke use
If the choke remains on after startup, the engine may stall.
What to do:
Move the choke to the “run” position after the engine starts.
Air leaks or loose components
Air leaks or loose parts can disrupt engine performance.
What to do:
Check for loose screws or fittings
Inspect seals and connections
Still not working?
If your hedge trimmer continues to start and then stop, it may require professional service.
Possible causes include:
Carburettor malfunction
Ignition system issues
Internal engine damage
Contact your local authorised Husqvarna dealer for support.
Prevent the problem
Regular maintenance helps avoid starting and stalling issues:
Use fresh fuel
Clean the air filter regularly
Inspect spark plug condition
Empty fuel before storage