Petrol Chainsaw support

⚠️WARNING: A saw chain with incorrect tension can come loose from the guide bar and cause serious injury or death.
⚠️WARNING: Turn the saw off.
⚠️WARNING: Wear gloves to protect your hands from the sharp chain.

Allow the chain to cool before adjusting. A hot chain expands and will tighten as it cools.

1. Loosen the Bar Nuts
Use a combination wrench (scrench) to loosen the two bar nuts on the side cover.
Do not remove them—loosen just enough so the guide bar can move slightly.

2. Locate the Chain Tensioner

The position varies by model:

Front tensioner – located at the front of the saw

Side tensioner– located beside the bar nuts

Tool-less tensioner – a large dial adjusted by hand

All types perform the same function.

3. Adjust the chain tension
Turn the tensioning screw:

• Clockwise to tighten

• Counter-clockwise to loosen

Adjust until the chain:

• Sits snugly against the underside of the bar

• Moves freely by hand (wear gloves)

• Has no visible slack

• Snaps back into place when lifted and released

As a guide, you should be able to lift the chain slightly at the centre of the bar and see only a small portion of the drive links without pulling them fully out of the groove.

4. Lift the Bar Nose and Tighten
While tightening the bar nuts, lift the tip of the guide bar upward.
This helps maintain correct tension during operation.

Tighten both nuts firmly using normal wrench pressure.

5. Recheck the Tension

After tightening:

• Pull the chain by hand to ensure smooth movement

• If too tight, loosen slightly and readjust

• If too loose, tighten again

6. After Initial Use
New or recently adjusted chains can stretch quickly.
Check and adjust tension again after 1–2 minutes of cutting.

A properly tensioned chain improves safety and performance.

⚠️NOTE: Some Husqvarna chainsaws have a non- adjustable oiler.