Author Topic: Jonsered 590  (Read 5052 times)

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Offline Cut4fun .

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Re: Jonsered 590
« Reply #10 on: March 12, 2011, 07:40:33 pm »
590 is  a closed port cylinder and there is a bridge there your not seeing. 

Look at very first pic in thread you can see it. Click on 1st pic to enlarge it and look down cyl sides.

http://chainsawrepair.createaforum.com/jonsered/jonsered-590/?action=dlattach;attach=51;image
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Offline SawTroll

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Re: Jonsered 590
« Reply #11 on: March 13, 2011, 10:52:38 am »
590 is  a closed port cylinder and there is a bridge there your not seeing. 

Look at very first pic in thread you can see it. Click on 1st pic to enlarge it and look down cyl sides.

http://chainsawrepair.createaforum.com/jonsered/jonsered-590/?action=dlattach;attach=51;image

Yes, it is pretty obvious in that picture.   :)

Offline Spike60

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Re: Jonsered 590
« Reply #12 on: March 13, 2011, 12:04:40 pm »
I've heard guys refer to that 590 style jug as "modified closed port", but I don't know if there is a universally accepted term. What do you guys call it?

That configuration, where the transfers are open at the bottom is why a Jonsered 930 is stronger than a 920, or a 372 is stronger than a 272.
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Offline Cut4fun

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Re: Jonsered 590
« Reply #13 on: March 13, 2011, 12:10:57 pm »
Closed port to me.

 My race 5000 copied after a Marcel Vincent 5000 alky cylinder and even went as far as to remove the bridge to make it open and my woods ported 5000 looked a lot like the 590 cylinder when all the grinding was done by 2 different builders on the cylinder area at the transfers.  Hope that long winded sentence made since.
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Offline SawTroll

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Re: Jonsered 590
« Reply #14 on: March 15, 2011, 05:59:01 pm »
What is the Mahle number of the 45mm 590 cylinder?

Offline Cut4fun

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Re: Jonsered 590
« Reply #15 on: March 15, 2011, 07:10:34 pm »
What is the Mahle number of the 45mm 590 cylinder?

Couldn't tell you since 590 is longer in my possession.  ;)   Been having a fire sale of stuff I no longer want or need.

Started getting rid of 166's, 3120's, 084's and now my 5000's, 590, couple 372's and traded 1 of 3 066 so far.  Might get rid of my woods ported 066 and maybe stock MS660 next.

 Only problem I get rid of 1 and usually get 3-4 more the same week.   ;D
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Offline man of stihl

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Re: Jonsered 590
« Reply #16 on: March 15, 2011, 07:21:59 pm »


 Only problem I get rid of 1 and usually get 3-4 more the same week.   ;D
[/quote]i wouldn't consider that a problem ;) ;D
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Offline Cut4fun

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Re: Jonsered 590
« Reply #17 on: March 15, 2011, 07:47:31 pm »
Only problem I get rid of 1 and usually get 3-4 more the same week.   ;D

i wouldn't consider that a problem ;) ;D

It is right now, getting tire of walking around them  :D  ::)

They are setting on the floor between the pool table and the mowers. Cant wait till summer so I can go through them all and start putting them up.
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Offline chainsman1

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Re: Jonsered 590
« Reply #18 on: March 15, 2011, 10:09:23 pm »
does a 590 top end fit on a 490?

Offline Cut4fun .

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Re: Jonsered 590
« Reply #19 on: March 16, 2011, 06:42:01 am »
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