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Experienced gardeners share their insights in answering this question :
You must loosen the 2 nuts that hold the bar inplace a little. Then the tension screw will turn.

How to Identify and Fix Common Gardening Problems ?

We provide a variety of viewpoints on how to identify and fix common gardening problems. Our sources include academic articles, blog posts, and personal essays from experienced gardeners :

If the clutch pads are worn out, the motor will run, but the clutch pads will not engage the clutch drum. As a result, the chain won`t turn. Make sure that the stop lever is disengaged. If the stop lever is engaged, the chain won`t turn.
Check for any debris around the bar and make sure it`s not worn down. If it is, you`ll notice that the rails are shallow. If that`s the case, it will need to be replaced. You will also want to make sure your chain oiler is in good order and that the chain itself does not have any broken teeth.
The chainsaw chain should feel snug but still pull freely.
Be aware of the effects of gravity on the wood you are cutting. Gravity will cause a log to bend when it`s cut, resulting in compression and tension. Compression can lead to binding of the saw and tension can cause the wood to spring out when released.
If your chainsaw shuts down when turned sideways, it is usually because the fuel filter is held away from the fuel, as the position of the chainsaw has changed. The fuel filter must be able to stay in the fuel as the position of the chainsaw is changed.
Be aware of the effects of gravity on the wood you are cutting. Gravity will cause a log to bend when it`s cut, resulting in compression and tension. Compression can lead to binding of the saw and tension can cause the wood to spring out when released.

Discover Relevant Questions and Answers for Your Specific Issue

the most relevant questions and answers related to your specific issue

Lost tension screw on Husqavarna 51. What is size of screw for replacement?
ANSWER : I think its 6.0×1.0 metric

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MS310 CHAIN ADJUSTER REPLACMENT
ANSWER : Http://www.mediafire.com/view/e354e1u6fb081x3
hope this helps

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Tension adjustment screw for ryobi rcs4046c chainsaw
ANSWER : Augmented agents 01614773388 may be able to assist

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My 290 isn’t oiling chain. I tried adjusting oil flow and still no oil?
ANSWER : You have to remove the bar and clean it out

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How do I reattach chain after it slipped off – Husqvarna "Chain Saw – 16" Bar, 3 Hp
ANSWER : Normal
0

This will be the basic instruction for most
common saws. Check that the chain brake is in disengaged position by moving the
front hand guard towards the front handle if the saw is equipped with a chain
brake on the handle. Loosen the bar nuts on the clutch cover. Loosen tension
screw or other adjuster (thumbscrew) to allow the bar to be moved toward the
engine. Some saws have this tension adjustment built into the bar. This will
provide enough slack in the chain to able to reinstall it. It may be necessary
to remove the side cover to gain access to the clutch/gear assembly on the side
of the engine if the chain also jumped the gear here. Remove the cover, inspect
for any debris or other obstructions in this area. If none, replace the chain
back over the drive gear and in the bar groove all the way around the bar. It
may be necessary to turn the bar adjuster screw more to provide enough slack in
the chain to do this. Once the chain is in place reinstall the cover and bar
lock nuts. Snug up the nuts but do not tighten these. Turn the bar/chain
adjuster screw to tighten the chain on the bar (take up slack). I usually
tighten to a point where there is no slack between the chain and the bottom of
the bar and I can still turn the chain easily around the bar by hand. With
experience you will get the feel for this chain tension. Once the chain is
properly tensioned, tighten the bar lock bolts/ nuts on the side cover. I hope
this helps you out.

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My chain rotates on idle when tension is ok. How do I adjust clutch drum to stop this happening ?
ANSWER : The clutch drum is probably ok, just turn the idle adjustment screw CCW to reduce idle speed (not the jet screws). If you turn it too far, the engine will stall.

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How to adjust bar oil flow as bar heating up too much even though chain is sharp
ANSWER : Not all Husqvarna models have an adjustable pump, if it is adjustable there will be a slot head screw either at the side of the sprocket, or just under neath the sprocket, there will be a small symbal of a drop of oil and a + and – sign.

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After a few months in storage, my saw will start, but the chain seems stuck – I can[‘t move it with my fingers, and when I gas up the engine, the chain doesn’t move & the engine stalls. There’s no rust, plenty of oil – everything is clean.
ANSWER : Release the chain tension adjuster and push the bar inward to make sure it moves. This is an auto-set tension adjustment and should set itself so that the chain can be be moved by hand. The chain oil on the bar may have gelled enough to prevent chain movement. A spray of WD-40 around the chain perrimeter would probably loosen the chain as well. Hope this helps!

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