Leaf Blower

Why is my leaf blower smoking? Causes and fixes

If your Husqvarna leaf blower is producing smoke, the colour of the smoke helps identify the problem.

Follow the guide below to quickly find the cause and fix it.

Quick answer

  • Blue or white smoke: too much oil or wrong fuel mix
  • Black smoke: too much fuel or poor airflow
  • Light white smoke at start: normal condensation

Start by checking your fuel mix and air filter.

Safety first

  • Stop the blower and let it cool before inspection
  • Disconnect the spark plug before maintenance
  • Do not use the blower if heavy smoke continues
  • Work in a well-ventilated area

What the smoke colour means

Blue or white smoke—most common

Cause:

  • Too much oil in the fuel mix
  • Wrong fuel type
  • Engine flooded

This is the most frequent reason for smoking in 2-stroke engines.

Fix:

  • Drain the fuel tank if needed
  • Refill with the correct fuel/oil mix
  • Let the engine run briefly to burn off excess oil

Black smoke

Cause:

  • Too much fuel (rich mixture)
  • Dirty air filter
  • Carburettor issues

Black smoke means the engine is burning more fuel than air.

Fix:

Light white smoke

Cause:

  • Condensation inside the engine

This is normal, especially when starting in cold or damp conditions.

Fix:

  • No action needed if it disappears quickly

Step-by-step troubleshooting

Learn how to troubleshoot smoke symptoms

Check the fuel mix

Incorrect fuel mixture is the most common cause of smoke.

Fix:

  • Use fresh fuel
  • Follow the correct oil-to-fuel ratio for your model

Check the air filter

A clogged air filter restricts airflow and causes smoking.

Fix:

Check for engine flooding

Too much fuel in the engine can cause smoke and poor performance.

Fix:

  • Let the blower sit for a few minutes
  • Restart with correct choke position

Inspect exhaust and components

Blocked exhaust or worn parts can cause smoke.

Fix:

  • Check for debris or blockages
  • Clean accessible parts

Common signs to look for

  • Smoke appears during operation
  • Reduced engine performance
  • Strong fuel or oil smell
  • Engine running unevenly

Still smoking?

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