Poulan 245A piston rings

[user 119840]

Now when I think back on when I rebuilt my 245A, my piston rings did not look like the official one's. The one's I bought when I was going to rebuild my saw was quite different. As you can see, the ends of the ring are angled. I remember I did file them down to be flat at the ends. Now, to get to my question. Does it matter if my rings looks different than the official one's? The one's I got was angled in the wrong direction. The one's in this eBay article were angled like this:

PISTON KIT FIT POULAN 245, 245A CHAIN SAW, REPLACE PART # 23253, NEW | eBay

Edit: I've had no problems running it, it just made me quite concerned when I think of it.

 

[RED-85-Z51]

The shape aligns the ring gap on the pins in the ring groove so they don't spin and snag a port.

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[RED-85-Z51]

If your rings are not pinned, then the shape they had means nothing beyond providing the correct end gap...and prevent blow by

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[user 119840]

I see. Well I guess there's no need to worry, as I've had no problems running it so far. I admit I have not run it too much ever since I rebuilt it. That was six years ago. But I recently checked the exhaust port, and it looks good.

 

[RED-85-Z51]

I see. Well I guess there's no need to worry, as I've had no problems running it so far. I admit I have not run it too much ever since I rebuilt it. That was six years ago. But I recently checked the exhaust port, and it looks good.

Did you check ring gaps before install, after filing?

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[user 119840]

Did you check ring gaps before install, after filing?

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Sadly I cannot remember. But the saw has not bogged down or died unexpectedly as far as I can remember. Smooth running since 2015.

Edit: I do remember checking multiple dimensions with a caliper.

Edit2: Mine looks like this now, after filed down: POULAN 245A, 245, PISTON RINGS 2638, 530002638 OEM STYLE, NEW | eBay