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Author Topic: Duramark 20" Chainsaw  (Read 1158 times)

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Offline Haggis

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Duramark 20" Chainsaw
« on: December 27, 2016, 02:22:40 pm »
Hi Fellas,

I pulled an old 20" Duramark from my closet that I purchased used from a friend long before I knew anything about chainsaws. I am still fairly green and I am in the process of cleaning it up to see if i can use it as a backup saw for when my husky needs a partner.

However once I dug into it and pulled the bar off and started taking a closer look the bar a zero information on it. The saw says it is a 20" and I counted the links and got a count of 70. I also noticed that the flywheel says 3/8 which would tell me its a 3/8 link. Now how do I determine the bar gap size (not sure what this is called)? Also I tried my 7/32 file and it seems to fit and I am sure i can get all the teeth  filed using this even if it should be another file size.

Any help you can provide on this saw would be greatly appreciated.

Cheers
Haggis

Offline DelawhereJoe

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Re: Duramark 20" Chainsaw
« Reply #1 on: December 27, 2016, 03:46:38 pm »
Any chance of seeing a few pictures of it, I went looking online and saw some that looked like rebranded homelites.
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Offline Haggis

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Re: Duramark 20" Chainsaw
« Reply #2 on: December 27, 2016, 11:05:06 pm »
Here are two images one of the saw and one of the flywheel indicating the 3/8.

 

  

 

Offline ReinkeFandS

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Re: Duramark 20" Chainsaw
« Reply #3 on: December 27, 2016, 11:26:07 pm »
I'm sorry I don't know about that brand but it looks alot like a Homelite XL. Usually the gauge would be stamped on the bar but I would be willing to bet it's .050. What is more important is to make sure the sprocket, bar and chain are all the same
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Offline dougand3

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Re: Duramark 20" Chainsaw
« Reply #4 on: December 27, 2016, 11:59:16 pm »
Now how do I determine the bar gap size? "gauge" is the term.

Use a feeler gauge....050" or .058" or .063". Or a US dime or penny or nickel.
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Offline Haggis

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Re: Duramark 20" Chainsaw
« Reply #5 on: December 28, 2016, 12:04:53 am »
I believe they are. No markings at all on the bar.

Offline John Mc

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Re: Duramark 20" Chainsaw
« Reply #6 on: December 28, 2016, 09:08:38 am »
Now how do I determine the bar gap size? "gauge" is the term.

Use a feeler gauge....050" or .058" or .063". Or a US dime or penny or nickel.

I've always used a dime, a penny, and a quarter
Dime = .050
Penny = .058
Quarter = .063

Note that if the bar is badly worn, the next size up might fit in it, giving you a false reading.

Never tried a nickel.
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Offline Haggis

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Re: Duramark 20" Chainsaw
« Reply #7 on: December 28, 2016, 09:52:31 am »
Thanks for the tips guys that helps allot.

Offline CTYank

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Re: Duramark 20" Chainsaw
« Reply #8 on: December 28, 2016, 12:37:33 pm »
Hi Fellas,

I pulled an old 20" Duramark from my closet that I purchased used from a friend long before I knew anything about chainsaws. I am still fairly green and I am in the process of cleaning it up to see if i can use it as a backup saw for when my husky needs a partner.

However once I dug into it and pulled the bar off and started taking a closer look the bar a zero information on it. The saw says it is a 20" and I counted the links and got a count of 70. I also noticed that the flywheel says 3/8 which would tell me its a 3/8 link. Now how do I determine the bar gap size (not sure what this is called)? Also I tried my 7/32 file and it seems to fit and I am sure i can get all the teeth  filed using this even if it should be another file size.

Any help you can provide on this saw would be greatly appreciated.

Cheers
Haggis

A few things:
A nominal 20" bar with 70 DL of 3/8" pitch chain is an oddball- std K095 bar of nominal 20" takes 72 DL chain. Some other saws take such a bar, so they're not hard to find in future: PP5020, Echo 590. Just something to look out for. (Chain length must match bar.)
What you call "flywheel" is the clutch drum. The flywheel is on the other end of the crank.
Best way I've found yet to file saw chain involves Granberg "File-N-Joint" guide. Clamps on bar, enables precision setting of filing angles, and height. Going now for $28 at NT. Yep, 7/32" file for 3/8" chain,then set up with 6" flat file for depth gauges a/r.
At least your version of Homie XL has something resembling a muffler. Many just have a small open pipe.
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Offline Haggis

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Re: Duramark 20" Chainsaw
« Reply #9 on: December 28, 2016, 03:26:26 pm »
Thanks for all the info!

Offline fossil

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Re: Duramark 20" Chainsaw
« Reply #10 on: January 02, 2017, 04:49:18 pm »
I have one just like it. Duramark was a Hudson's Bay company brand. The saw is a Terry (Homelite plant in Pointe Claire) built Homelite Super XLAO with a chain brake. The brake makes them relatively rare.

The Super XL's take a 70 DL chain on a 20" bar. If you have a vernier caliper, check the slot width. If it's the original bar, it's likely worn wider.
Most all of my Homelites with 3/8 pitch chain came with .050 gauge chain.

If you can tell us the brand of chain which should be stamped on a cutter or tie strap and if there is a number, letter or combination of on the drive link (that goes into the bar groove we can tell you the gauge.
Tim

Offline Haggis

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Re: Duramark 20" Chainsaw
« Reply #11 on: January 09, 2017, 11:11:38 am »
Any idea how many CC's it is? I have tried looking for this info and came up short.

Offline Haggis

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Re: Duramark 20" Chainsaw
« Reply #12 on: January 09, 2017, 01:53:01 pm »
One other question. The saw is rated to run a 32:1 mixture. I really would prefer to run one mixed can but my Husky is a 50:1. With current oil is there any harm in running the same gas mixture through the this saw?

Offline sawguy21

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Re: Duramark 20" Chainsaw
« Reply #13 on: January 09, 2017, 04:28:08 pm »
Probably 56cc or thereabouts. Your oil question opens a whole 'nuther can of worms. I run my saws (at least the ones that run) on 50:1 but there are some that will strongly disagree with me.  ;D That saw was built in the 60's when all we had was 30w motor oil, the current 2 stroke mix oils are much improved and quite capable of lubricating your saw. If you feel better going heavier by all means, the mosquitoes will hate you.
old age and treachery will always overcome youth and enthusiasm

Offline thecfarm

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Re: Duramark 20" Chainsaw
« Reply #14 on: January 09, 2017, 09:23:30 pm »
I don't strongley disagree with you,don't really disagree either.
 Unless you try to tell me how good grits are.  ::)
I run my 372 husky 40:1. Been doing that for years. It's tuned to that too. No idea if it's OK or not. Been doing it for 10 years?? Still going.
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Offline sawguy21

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Re: Duramark 20" Chainsaw
« Reply #15 on: January 09, 2017, 10:23:53 pm »
You don't need to worry about me regarding grits, I'm on your side. :D
old age and treachery will always overcome youth and enthusiasm

Offline Haggis

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Re: Duramark 20" Chainsaw
« Reply #16 on: October 11, 2017, 02:20:37 pm »
Sorry it took so long to respond been a little busy remodeling my kitchen.

So i had a look at the chain and bar and the bar is original I think as it has the Duramark logo on the side. The chain doesn't appear to have any markings other than a 72 stamped on the bottom part of each link. If that 72 stands for number of links then it's odd because I counted 70 multiple times. I don't have a a way to check the gauge other than the dime, penny, nickel but I think it is worn so may not be accurate. Also from what I can tell the teeth seem to fit a 5/32 file. Is this possible?

Thanks for any help you guys can provide.

Haggis

Offline sawguy21

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Re: Duramark 20" Chainsaw
« Reply #17 on: October 11, 2017, 02:39:47 pm »
Oregon 72 series chain is 3/8" pitch, .050 gauge which is correct for that saw. 70 drive links is correct for the 20" bar, Homelite had to be different. 72 is much more common.
old age and treachery will always overcome youth and enthusiasm

Offline Haggis

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Re: Duramark 20" Chainsaw
« Reply #18 on: October 12, 2017, 06:54:47 am »
Thank you for the information. Think I need to pick up a new bar for it too, looks pretty warn. Is a 5/32 file correct for this chain?

Offline sawguy21

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Re: Duramark 20" Chainsaw
« Reply #19 on: October 12, 2017, 10:24:53 am »
7/32 would be a better choice, you may want to drop to a 3/16 as the cutters get shorter.
old age and treachery will always overcome youth and enthusiasm