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Stripped bar stud

Stihl ms 440 magnum chain saw and one of the bar studs is stripped, now bar and chain do not tighten properly..is there a fix besides replacing crankcase?

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Many Sthil chainsaws have replaceable bar studs. The stud threads into the case. Go here: http://www.baileysonline.com/itemdetail.asp?item=QA+0000+953+6605&catID=407
look for part by model number, usually no more than a few dollars. Enjoy

Posted on Dec 21, 2008

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How to change chain tensioner on stihl ms 290 farmboss chainsaw


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1 Answer

The threaded sleeves for the studs that hold the guide bar are stripped. What can I do to repair them?


remove bad studs with stud extractor and replace with new ones ?? or maybe normal bolts ?? (if in engine housing )
or in a bind ive even rethreaded them to fine thread (assuming course was old thread) with a die and used std fine nuts on them as well .

if studs go in plastic case/frame then case needs to be disassembled and then studs press out other direction

Mar 16, 2015 | Chainsaws

1 Answer

I put the bar & chain on, the three hole line up easily but how do i get the brake back on the clutch?


The proper sequence to installing the chain should be to first ensure the brake is in the 'unlocked' position then loosen the chain adjustment screw, slip the chain over the back of the sprocket, align the chain with the bar, slip the bar onto the bar mounting studs ensuring the adjustment pin slips into the appropriate hole in the bar. Then slip the outer chain cover over the bar studs, elevate the front end of the bar and tighten the bar mounting nuts to 'snug'. Adjust the chain tension to the desired setting ensuring the front of the guide bar remains elevated, then tighten the nuts to secure the bar.


Remember to unlock the brake BEFORE removing the bar and chain because it is so much easier to unlock it mounted on the saw if yours is the design that comes off with the cover. If yours stays on the block of the saw and the blade is removed you have to secure the saw on the workbench or on the ground and unlock the brake just like you would with the bar installed.

Keeping the front of the bar elevated during assembly and adjustment of the chain will keep the chain tension correct for a much longer period. I hope this helps.

Mar 03, 2015 | Chainsaws

1 Answer

I have a Stihl MS 290, runs great, but the chain keeps tightening it's self on it's own


That's an unusual problem, usually the opposite happens. After making sure the chain brake is off, loosen the two nuts that hold the bar. Be sure to hold the bar up when adjusting the tensioner screw and adjust until the chain is just snug, but not too tight. While still holding the bar up, tighten the two nuts firmly. Check to see that the chain can move freely by hand. Then start the saw and run the chain at speed with something in front of the nose to check for adequate lubrication. You should note a slight fine spray of oil on the object in front of the nose of the bar. Inadequate lubrication, a chain that is binding on the bar, or an overly tight chain can cause the bar to heat up and expand, further tightening the chain. A properly adjusted Stihl saw will use almost all of the chain oil in the reservoir for every tank of gas. Too much oil is better than too little. The oil feed may have to be adjusted for operating in temperature extremes. If operating in very hot conditions, be sure that the saw has not run out of chain oil. The oil feeds faster when hot.

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1 Answer

I can't tighten the chain on my stihl ms 251 chain saw


Pull the side cover and check for a broken or misaligned chain tensioner. I assume that you have loosened the bar nut on the side cover before attempting to adjust the chain tension. The methiod varies depending on whether your model has the side chain tensioner or the quick chain tensioner.

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My chain wont tighten on my stihl 044 chainsaw


Assuming you have the right length chain and its not just running out of adjustment, it would then probably be a stripped or snapped chain adjuster. Can be coursed when the bar nuts aren't dun up before starting to cut, the force of the chain saw will snap an adjuster no problems. If its striped it might smear like its adjusting in but when it gets to a point it will just stop

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1 Answer

Chain keeps comming off my stihl 044


Download manual at:
http://www.stihlusa.com/WebContent/CMSFileLibrary/instructionmanuals/044_Manual.pdf
Go to page 26. Remember to pull front of chain bar up before you tighten nuts. Make sure you really tighten nuts so they do not allow bar to move when finished.

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1 Answer

How do you tighen a chainsaw chain?


Depends on the chainsaw. On most Stihl saws there is a screw between the two bar locking bolts that you turn clockwise to tighten the chain. On other saws the screw is in front of the housing that the bar and chain come out of and face into the housing, parallel to the bar. Clockwise still tightens the chain.

In both cases you have to loosen the nuts on the guide bar studs and then adjust the tension adjustment screw.

For more info go to the manufacturer's web site and download the owners manual.

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1 Answer

16" chain, 16" bar it


You're not tightening the nut tight enough.

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1 Answer

Looking for the studs that holds the bar in place. There is 2 of them that screws into the MS 310 Stihl chainsaw


You have to go through a Stihl dealer or some one that sells that saw. there are some places i have gotten parts on line but its much quicker if you go to the sellers of Stihl saws

Jan 08, 2011 | Stihl Chainsaws

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