what to replace 16 " 011 with ?

[Tacotodd]

doc, BTW, Oregon term is 3/8lp, Stihl is Pico. Same thing but different name, but be careful on assuming, I KNOW (for example) .325 RS Stihl has ZERO green chain features whereas Oregon, even if they say it's yellow chain, just SCREAMS green!

[doc henderson]

so @Happy Sawyer you are saying he can go from a 0.325 sprocket and chain, to a 3/8th p chain using the old sprocket?  if I am hearing him correctly.  I only know my own stuff, not claiming to be an x-pert.

[Tacotodd]

C N R, I hope I've answered your questions, but in re-reading the question, I have certain doubts as to the question. Please tell me if answered completely and sufficiently. My mind is just TO scatter brained, always, that's why I have books! I've just not had pen/pencil and paper handy since working in my career. Long story 😱

doc, NO, you cannot do it (unless you like damage and/or short life span to components)! lp or pico, reg 3/8 , yes! .325 to ANYTHING else- NO. 3/8 isn't quite .375", more like .366". Nothing on 1/4, .325, 3/8 anything or .404. Those 4/5 (depends on how you look at it) ARE DIFFERENT! 

[doc henderson]

that is why I asked, as I am still not sure what the OP "intends" to try to do.  I agree with your comment and why I keep trying to clarify!  thanks all.

[Happysawer]

so @Happy Sawyer you are saying he can go from a 0.325 sprocket and chain, to a 3/8th p chain using the old sprocket?  if I am hearing him correctly.  I only know my own stuff, not claiming to be an x-pert.

If you look at both the sprockets on the CM211 and CM261 you will see why Sthil is saying you won't need a new sprocket.

The CN211 has the chain being driven on the outside by external tooth sprocket.
The CM261 has the chain being driven on the inside of the sprocket.
Both chainsaws have completely different type sprockets, you can use the same chains on each, because of one being external and the other internal.
You would have to see them to really understand just what i am trying to explain, but where the chains drive teeth interface with both sprockets they are the same spacing.
This is the reason Sthil said you don't need replacing the CM211 sprocket.

[doc henderson]

@CUT N RUN , if you can give the driver count # of what your current chain is, then you CAN come up with the number of drivers on whatever (ANY size) chain you want. The saw might not pull it effectively, built can be done. For a ridiculous example, (to express my point) .325 to .404, with minor extrapolation 84 link of .325 is 4.54'. 67 link of .404 is 4.53'.

55 d.l. = 16 " bar ,stihl  63pm.... oregon 91....
and yes , for all concerned , i am changing pitch , if i get the 250,  from 325 -to 3/8--- 63pm...( the reason again is i have a whole bunch of these sized chains )

so once again @Happysawer are you are saying he can go to a 3/8th p chain and run it on the 0.325 sprocket?  cause that is what I think I am reading.

[Happysawer]

If you look at both the sprockets on the CM211 and CM261 you will see why Sthil is saying you won't need a new sprocket.

The CN211 has the chain being driven on the outside by external tooth sprocket.
The CM261 has the chain being driven on the inside of the sprocket.
Both chainsaws have completely different type sprockets, you can use the same chains on each, because of one being external and the other internal.
You would have to see them to really understand just what i am trying to explain, but where the chains drive teeth interface with both sprockets they are the same spacing.
This is the reason Sthil said you don't need replacing the CM211 sprocket.
====
I might add if i return the Sthil 18" bar and chain to the CM211, the chain will again run on the external tooth drive of sprocket, where while on CM261 it ran on the internal part of sprocket.

[Tacotodd]

Happy Sawyer, I still don't think that you've answered doc's question (or mine) to his satisfaction. I know what he's asking. I'm just not sure exactly HOW you're trying to say it to his satisfaction, or mine.

[doc henderson]

It seems like a robo-text with the same info.  but I am honestly just trying to help member @CUT N RUN .



 

 

ok my uncle's ol 015, and the drive mech.





 



my pole saw 3/8th picco

 




my 261  0.325


 


 

 

and my sons original 250 easy start with 0.325.
I did not include my 3/8th 046 mag, or the .404 880 mag.
I do not know if this helps.  but I know what you mean by an internal and external sprocket, but the pitch still needs to be the same in my opinion.

[Happysawer]

It seems like a robo-text with the same info.  but I am honestly just trying to help member @CUT N RUN .



 

 

ok my uncle's ol 015, and the drive mech.





 



my pole saw 3/8th picco






my 261  0.325





 

 

and my sons original 250 easy start with 0.325.
I did not include my 3/8th 046 mag, or the .404 880 mag.
I do not know if this helps.  but I know what you mean by an internal and external sprocket, but the pitch still needs to be the same in my opinion.

Doc. the two pictures you posted one of your 261 the other your 250, they show the just what i am trying to describe, on the 261 the chain is being driven on the internal part of sprocket and on the 250 the chain is being driven on the external part of sprocket.

[Tacotodd]

@doc henderson , your turn to try. Because I still don't know what message he's trying to convey. As far as relating to the DL question. I may be the one not understanding though.

[doc henderson]

I agree with that.  so the question, can you run 2 different pitch chains on the same sprocket? (not at the same time of course).  honestly the question.  put a 3/8th pitch chain on a 0.325 sprocket?

[Happysawer]

I agree with that.  so the question, can you run 2 different pitch chains on the same sprocket? (not at the same time of course).  honestly the question.  put a 3/8th pitch chain on a 0.325 sprocket?

If you look at the pictures there two diffrent sprockets, but one is just an external tooth drive the other has a internal drive sprocket.
It's just the CM211 is using a design of only the external type, the CM261 has a different Design sprocket.
This allows you to run the same chain on both the CM211 and the CM261.

[doc henderson]

thanks for the reply @Happy Sawyer , and I do not mean to put you on the spot, but I understand him to be saying that he wants to use his 3/8th p chain on a 250 with the original sprocket.  @CUT N RUN please correct me if I am wrong.  thanks guys!

[Happysawer]

thanks for the reply @Happy Sawyer , and I do not mean to put you on the spot, but I understand him to be saying that he wants to use his 3/8th p chain on a 250 with the original sprocket.  @CUT N RUN please correct me if I am wrong.  thanks guys!

It looks like the 250 has the same external tooth drive sprocket as is on my CM211, so i am guessing he can put the chain on and it will work, he should know by looking if the chains drive teeth are they fitting on the sprocket right.

[ladylake]

 
 What does it matter if the chain is driven from the inside or the outside??,, Just so long as the chain ,sprocket and bar tip are the same pitch, either .325 or 3/8   Steve

[btulloh]

Roger that. Correct size for the drive links is what matters. 

That's a good illustration of one of the differences between the pro saws and the others. Pro saws the sprocket is a separate item and replaceable. HO and Farm saws, the sprocket is fixed to the clutch and you have to replace the clutch to replace the sprocket. 

Not sure how long it's been like that. 

[CUT N RUN]

@doc henderson  - @Tacotodd  - @Happy Sawyer   i,m gonna do kind of a do-over. i,m trying to replace (2) o11 16 " saws w/ (1 )  ms250 .  the 011,s repair parts ( some ) have dried up is the main reason.   i have a whole bunch of chains i would love to b able to run.  And these chains are 3/8 lp or picco , or 91..

 

 the 250 comes stock with irrelevant 18" bar , geared for .325 chain. MY dealer said the sprocket needed changed out because of the differing pitches of the chains , regardless of bar length . i,m ok with that. one sprocket cost is i,m sure waaaaay cheaper than buying several new chains.... now the d. l. count...my chains are 55 . what would the count b on the 250 ? pics of the saws , bar and chain

[Tacotodd]

C N R, what pitch chain are you wanting to run? What brand bar?

If Oregon brand bar, I can help. If Stihl, I can only make an educated guess.

What pitch is the bar TIP set up for?

[CUT N RUN]

C N R, what pitch chain are you wanting to run? What brand bar?

If Oregon brand bar, I can help. If Stihl, I can only make an educated guess.

What pitch is the bar TIP set up for?

pics and description of chain r above , . and if i get the 250 , it will b new from a stihl dealer , i,m assuming they will install a stihl bar. bar tip pitch ?  i am clueless !

[doc henderson]

so if you want to put the bar and chains in the picture, on the 250, take them to the dealer and have him get the saw out of the box, or better yet the service guy, and see if it will work.  make sure the bar will bolt up, and an appropriate sprocket can go on your saw.  my dealer will usually swap a few things out for free, if it is not too big an upgrade.  I do not know, but I think and 0.325 chain may make bigger chips, so if it were me, I might keep the original sprocket, bar and chain and compare.  you then can get a new 3/8th sprocket, to use up you old bar and chain collection.  you may decide the original stuff mated up with the saw is better and eventually return to it.  especially if the dealer charges you for everything new anyway.  thanks all for helping to solve the mystery.  

[doc henderson]

the sprocket, and bar tip and chain all need to be the same pitch.  the gage of the drivers need to be the same as the bar grove.  you are correct.  the dealer can help you with mating up the old stuff if possible to the new saw, or leave it original, and sell the old bars and chains on EBAY or such.

[doc henderson]

it may turn out that the way the bar adjustment and sprocket are configured, that you would have to add a link, and the dealer may want to charge you for that.  that is why I would take it in with you.  good luck.  

[CUT N RUN]

so if you want to put the bar and chains in the picture, on the 250, take them to the dealer and have him get the saw out of the box, or better yet the service guy, and see if it will work.  make sure the bar will bolt up, and an appropriate sprocket can go on your saw.  my dealer will usually swap a few things out for free, if it is not too big an upgrade.  I do not know, but I think and 0.325 chain may make bigger chips, so if it were me, I might keep the original sprocket, bar and chain and compare.  you then can get a new 3/8th sprocket, to use up you old bar and chain collection.  you may decide the original stuff mated up with the saw is better and eventually return to it.  especially if the dealer charges you for everything new anyway.  thanks all for helping to solve the mystery.  

dealer said he has the 16" bar to run my chains , and would do the swap at the cost of the sprocket. if the bar happens to be the same as mine , so b it , i have some beaters left over. the 325 may be faster , i,m not really concerned on that front . saving $$ ( using up my existing chains ) is my first concern. ( and when i,m cutting for others , i generally get paid by the hour !!!!  )  thanx for all your help

[CUT N RUN]

it may turn out that the way the bar adjustment and sprocket are configured, that you would have to add a link, and the dealer may want to charge you for that.  that is why I would take it in with you.  good luck.  

when the time comes , i dfinately am taking a chain or 2 with me . many of my chains have come from others , used , and i,ve shortened many and spliced a few to make them fit . taking out a link is 1 thing , having to add 1 would really suk .!! but as murphys  / my law goes i,m sure they will have to be longer. i have checked into a echo of comparable engine size as the 011 . and with the same chains / bar length , they r 3 links  longer .