Chainsaw Repair

Husqvarna - Stihl - Poulan - Jonsered - Dolmar chainsaws and more => Poulan => Topic started by: davbell22602 on December 16, 2012, 09:38:02 am

Title: Poulan 2250: Chain Keeps Coming Loose
Post by: davbell22602 on December 16, 2012, 09:38:02 am
I still cant figure out why this chain keeps coming loose when using this poulan 2250. Chain sprocket is good, overtightened the chain a little bit before tightening the bar nuts, and over tightened the bar nuts a little too. Still comes loose enough where I can see drag link tips from the chain when it sags/hang of the bar.  Its not loose enough to take off the chain by hand with bar nuts still on the saw tight. I'm down to either bad bar or stretched oregon chain.
Title: Re: Poulan 2250: Chain Keeps Coming Loose
Post by: Cut4fun on December 16, 2012, 01:27:14 pm
What tensioner system does your 2250 use? 

The 66dl chain that came on the jd 450 with 16" 66dl bar  is stretched to where it wont stay tight either and is at the end of bar adjustments.  It just needs a new chain.

Without bar and clutch cover on the saw. Is bar oil flowing freely when the saw is running from the oiler hole on crankcase bar area?
Title: Re: Poulan 2250: Chain Keeps Coming Loose
Post by: 3000 FPS on December 16, 2012, 01:35:54 pm
Did you put a new sprocket on?    I ask because you say the sprocket is good.
Title: Re: Poulan 2250: Chain Keeps Coming Loose
Post by: davbell22602 on December 16, 2012, 01:55:24 pm
What tensioner system does your 2250 use? 

The 66dl chain that came on the jd 450 with 16" 66dl bar  is stretched to where it wont stay tight either and is at the end of bar adjustments.  It just needs a new chain.

Without bar and clutch cover on the saw. Is bar oil flowing freely when the saw is running from the oiler hole on crankcase bar area?

I have the screw it located on the bar cover.  Its gets lots of oil.
Title: Re: Poulan 2250: Chain Keeps Coming Loose
Post by: 3000 FPS on December 16, 2012, 02:32:10 pm
Put on the bar and chain tighten it up and then put a witness mark right where the bar extends from the clutch cover.  Run the saw until is loosens up again and check the witness mark.   If it is exactly the same then it has to be either sprocket or chain.
Title: Re: Poulan 2250: Chain Keeps Coming Loose
Post by: davbell22602 on December 16, 2012, 03:09:32 pm
Here's pics

(http://i938.photobucket.com/albums/ad228/davbell22602/Lawnmower%20Collection/poulan22502.jpg)

(http://i938.photobucket.com/albums/ad228/davbell22602/Lawnmower%20Collection/poulan22503.jpg)
Title: Re: Poulan 2250: Chain Keeps Coming Loose
Post by: 3000 FPS on December 16, 2012, 03:13:14 pm
Are you still running the original sprocket that came with the saw?
Title: Re: Poulan 2250: Chain Keeps Coming Loose
Post by: davbell22602 on December 16, 2012, 03:15:56 pm
Are you still running the original sprocket that came with the saw?

I dont know. This was a freebie saw. I been having issues with a loose ever since I got it.
Title: Re: Poulan 2250: Chain Keeps Coming Loose
Post by: davbell22602 on December 16, 2012, 03:16:16 pm
Here's a video of my sprocket. Dont know if you can tell if its worn enough to be replaced or not.

http://www.youtube.com/watch?v=xZcKcX910d4&feature=youtu.be
Title: Re: Poulan 2250: Chain Keeps Coming Loose
Post by: Cut4fun . on December 16, 2012, 03:24:54 pm
What is the drive link of the chain?  What is the bar length and dl count listed on bar? 

I'm still betting overly stretched chain or wrong chain.

Looks like 18" on bar. Should be 62dl chain. Now count your dl's on your chain.  If thats different there you go.

 If not the chain is stretched or do what 3000 said. Use silver marker to outline bar mount to crankcase to see if movement or not.
Title: Re: Poulan 2250: Chain Keeps Coming Loose
Post by: davbell22602 on December 16, 2012, 03:31:39 pm
What is the drive link of the chain?  What is the bar length and dl count listed on bar? 

I'm still betting overly stretched chain or wrong chain.

18in bar and here's the numbers on the bar530044693 RZ, 18, 91. My chain is 62 drive links. I just noticed the bar is slightly bent/warped about a 1/8 in.
Title: Re: Poulan 2250: Chain Keeps Coming Loose
Post by: 3000 FPS on December 16, 2012, 03:41:38 pm
I dont know. This was a freebie saw. I been having issues with a loose ever since I got it.


The slight bend in the bar will not cause it to loosen up.  If that is the original sprocket and it looks like it could be I would replace it.   I cannot tell from the video how bad or how it is worn but it does show signs of wear so I would replace it. 
Title: Re: Poulan 2250: Chain Keeps Coming Loose
Post by: Cut4fun . on December 16, 2012, 03:45:09 pm
Do you have another 62dl chain that is known good to try.
Title: Re: Poulan 2250: Chain Keeps Coming Loose
Post by: davbell22602 on December 16, 2012, 03:51:21 pm
Do you have another 62dl chain that is known good to try.

Yes I got silver streak and Carlton chain I got from my Stens rep to try out on this saw.
Title: Re: Poulan 2250: Chain Keeps Coming Loose
Post by: Cut4fun . on December 16, 2012, 03:58:28 pm
Just thought of something to try too. This will tell info on the spur sprocket.
Tighten chain up like normal. Then use your hand and move chain forward around and around. It should be smooth with NO BINDING. If it is catching or binding up the spur sprocket is worn.
Title: Re: Poulan 2250: Chain Keeps Coming Loose
Post by: 3000 FPS on December 16, 2012, 04:00:28 pm
I am very curious now so post what you find out when you try the new chain.  Is that a 3/8 low pro chain.
Title: Re: Poulan 2250: Chain Keeps Coming Loose
Post by: davbell22602 on December 16, 2012, 04:11:49 pm
I am very curious now so post what you find out when you try the new chain.  Is that a 3/8 low pro chain.

Yes low profile chain.