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My echo 600cs chain saw locked up recently, Ithought the engine seized up. When I removed the chain and bar I discover that the sprocket was broken which caused damage to the chain, bar and adjuster. Has anyone else had a sprocket break in pieces like this? The dealer is blaming me for misusing the saw, but it suddenly failed while sawing normally.

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  • 11 Answers

Happens quite often. you need to replace the sprocket more often, as this is normally associated with wear & tear

Posted on Jul 23, 2014


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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: poulan 2600 chainsaw

check and make sure you have the correct your chain .325,3/8?sprocket has to match as well as chain and bar

Posted on Oct 20, 2008

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SOURCE: Makita 5012B chain cannot be tightened

some chainsaws have different knotches where the bar locks onto the saw. loosen the nuts and see if you can move the bar.

Posted on Dec 13, 2008

  • 1 Answer

SOURCE: poulan pro series chain saw 20" bearings seizing up on bar

There's a tiny hole on the front of the bar near the bar sprocket. This is used to grease the sprocket. If you go somewhere like Lowe's look in the chainsaw section and you'll find a grease tube that is specially designed to lube the front sprocket. Before lubing use a small wire to clean out any debris from the whole. Press the lube tube against the hole and push repeatedly until grease comes out from the outside of the bar. This should greatly extend the life of the bar.

Posted on Jan 09, 2009

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SOURCE: need to know oil to gas ratio mix for echo 510 evl chain saw

50:1 or of its old 100:1

Posted on Mar 20, 2009

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SOURCE: Chain tightens up under power to point engine stalls

If you've already tried to tighten the bar tensioning nuts and the bar keeps "creeping" and gets tighter, that is unusual, as most times the bar should get looser, not tighter.

I would suggest you try a new bar and set of tension nuts, or at the very least a new set of tension nuts first.

The problem might be the tip sprocket has worn out (it needs to be lubed every time you add bar & chain oil to the reservoir in the chainsaw). If the tip sprocket is worn badly, you should replace the bar and inspect the cutting chain for excessive wear on drive side of the chain.

Remember that the slightest bit of dirt can cause rapid wear of the bar and chain and quickly ruin it beyond repair.

I hope you find this helpful and best regards!

Posted on Aug 06, 2009

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Remove the bar and chain. Lay the chain out on a bench or table and examine for sideways bent/broken links, badly damaged cutting teeth, or damaged drive teeth. Inspect the bar chain-groove all the way around for any damage. Make sure the tip sprocket turns freely and is not damaged. Check the sprocket on the clutch drum for hooked teeth or other damage. Clean the small oil passages that feed oil out to the chain groove in the drive end of the bar. Start the engine and check the engine side port where the bar fits to--it should ooze out oil from the small port there. If everything checks ok, re-assemble the bar and chain leaving the cover fasteners finger tight. Adjust the chain until it pulls up to the bar, but not so tight that you can't turn turn it by hand. Tighten the bar fasteners and re-check the chain tension. Start the engine and hold the bar tip near some cardboard--it should throw off a thin line of oil after several moments of running at speed. Hope this helps!

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