Author Topic: 590 piston  (Read 274 times)

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Offline skipknot

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590 piston
« on: November 29, 2014, 10:03:16 pm »
  Does anyone have the dimensions of a 590 piston ?
  Or no if a 535 piston will work in a 590 ?

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Offline 660magnum

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Re: 590 piston
« Reply #1 on: November 29, 2014, 10:37:45 pm »
Those two saws have the same bore and stroke. 45 X 32  50.8 cc

It is likely the 535 was open port and the 590 was closed port with a windowed piston?
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Offline skipknot

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Re: 590 piston
« Reply #2 on: November 29, 2014, 10:51:42 pm »
I found a NOS 535 piston today that I didn't even know  I had.. It is a windowed piston with a 10 mm wristpin. But I can't find my old 590 piston to compare to.. I might just have to stick it in and do some measuring..

Offline 660magnum

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Re: 590 piston
« Reply #3 on: November 29, 2014, 11:00:14 pm »
That would be best.

I consider that you are in luck?

Check the wrist pin and also will the skirt width and length cover the exhaust port when the piston is at top dead center?
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Offline 660magnum

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Re: 590 piston
« Reply #4 on: November 29, 2014, 11:18:58 pm »
Stick both pistons on the same wrist pin and compare the compression height and skirt length
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Offline farmboy

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Re: 590 piston
« Reply #5 on: November 30, 2014, 08:27:40 am »
535 piston is NLA.  Scarce as hens teeth.  Where did you come across one?  PN's are different 535-503-1638-01 590-503-1687-01.
Shep

Offline Cut4fun .

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Re: 590 piston
« Reply #6 on: November 30, 2014, 09:04:07 am »
I had 590 pistons in past. But dont know if I posted  any specs anywhere. 

Did save Mitch's  for 45mm piston and a 535 here.  http://chainsawrepair.createaforum.com/jonsered/jonsered-535-472/msg4224/#msg4224
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Offline Cut4fun .

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Re: 590 piston
« Reply #7 on: November 30, 2014, 09:09:16 am »
590 piston option and 2 different oem 590 cylinders out there.
If you have the ones like I had or modify yours like stihlbro did you can run a non windowed piston in the closed port. http://chainsawrepair.createaforum.com/jonsered/jonsered-590/20/
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Offline Cut4fun .

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Re: 590 piston
« Reply #8 on: January 23, 2015, 05:25:39 pm »
535 piston is NLA.  Scarce as hens teeth.  Where did you come across one?  PN's are different 535-503-1638-01 590-503-1687-01.
Shep

They have a aftermarket 535 piston now. http://www.ebay.com/itm/JONSERED-535-PISTON-KIT-45MM-REPLACES-PART-503163801-NEW-/181636507813?pt=LH_DefaultDomain_0&hash=item2a4a6128a5

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