Author Topic: 45mm Piston for closed port cyl  (Read 381 times)

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Offline boxygen

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Re: 45mm Piston for closed port cyl
« Reply #10 on: January 23, 2015, 10:24:19 pm »
Thanks for the specs. Thats half the battle. My 55 CP box o saw that is on its way to me has no piston with it to measure for comparison :-\

Offline 660magnum

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Re: 45mm Piston for closed port cyl
« Reply #11 on: January 23, 2015, 10:49:06 pm »
If you had a complete saw minus the piston . . .

You might surprise yourself on your ability to develop the dimensions of the piston needed as to bore, compression height, skirt length, skirt width, piston pin boss width, and pin diameter? Most of this you can see as imprinted wear patterns on the used cylinder and a quick measurement of the rod? Most of this can be achieved with the wife's cloth dress measuring tape.
We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
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Offline Cut4fun .

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Re: 45mm Piston for closed port cyl
« Reply #12 on: January 25, 2015, 09:38:20 am »
Was husky marking the top of oem cylinders on these like other cylinders?
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Offline Cut4fun .

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Re: 45mm Piston for closed port cyl
« Reply #13 on: January 25, 2015, 11:09:05 am »
Thanks for the specs. Thats half the battle. My 55 CP box o saw that is on its way to me has no piston with it to measure for comparison :-\

You need to measure your bore to see what you have?  You say closed port? Your sure CP and 45mm then?  If so you might be able to just clean up cylinder and use that jonsered 535 45mm  piston.


That 46mm piston in those kits are.


Bore 45.93mm
Height 37mm
Head Type Flat
Piston Pin 10mm x 34mm x 6mm
Ring 46mm x 1.5mm Caber
Compression/Pin Top to top of Piston 14mm
Compression/Pin Center to top of Piston 19mm
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Offline boxygen

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Re: 45mm Piston for closed port cyl
« Reply #14 on: January 25, 2015, 05:20:40 pm »
It hasnt made it to me yet. Hopefully it will make it here in time for the Blizzard.  :o The previous owner send me photos of it including some of the cylinder. First thing I will do is measure it. It sure looks like the CP version. I am hoping that maybe I can clean up the cylinder and use the 535 piston. I was just hoping to get the actual dimensions of the CP 55 piston to compare against the 535 piston. THey sure look the same but I havent seen anyone confirm that the the critical dimensions like the overall height and dimension from the pin to top is the same as the 535. Maybe I missed it. It is putting me at a disadvantage having the previous owner already toss the piston. What does this cylinder look like to you all?

Offline Cut4fun .

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Re: 45mm Piston for closed port cyl
« Reply #15 on: January 25, 2015, 07:17:21 pm »
I'm sure the 55 590 piston 45mm specs are here somewhere.
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Offline Cut4fun .

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Re: 45mm Piston for closed port cyl
« Reply #16 on: January 25, 2015, 07:29:56 pm »
I know mweba has said he used the jonsered 535 piston even in the 45mm husky 353 etc.
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Offline Cut4fun .

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Re: 45mm Piston for closed port cyl
« Reply #17 on: January 25, 2015, 07:35:05 pm »
jonsered 590 also 55 CP used piston I had but never measured and entered specs as far as I can tell.

Anyone got specs on a stock 590 55CP piston?   We got Mitch's 535 piston specs already.





Sure look like twins

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Offline boxygen

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Re: 45mm Piston for closed port cyl
« Reply #18 on: January 25, 2015, 08:24:27 pm »
I've been searching the net but cant find anything for specs. They sure do look similar.

Offline boxygen

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Re: 45mm Piston for closed port cyl
« Reply #19 on: January 26, 2015, 11:30:31 am »
Copied from other places:
Jonsered 535 piston specs:

35.4mm tall
 pin height 13.8
 skirt 29.66
 wrist width 10.52
 pin 10mm

Husqvarna 55 closed port piston specs:

Compression Height = 19mm
 Total Height = 37mm
 Width between pin bosses -=14.75mm
 Pin Diameter = 10mm

Doesn't look close enough for a direct out of the box replacement.

 

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