Husky 346xp piston cylinder issues

[spudulike]

Ah...how about this, piston ring pin comes out, gets rammed between the piston crown and squish band, con rod gets bent......very possible, what does the squish band and piston crown look like? Any indentations?

[Dan Maynard]

That’s the thinking but I also want to not just scrap old saws. 

Got to find one to buy, too - not that easy.

[Ratman]

Ah...how about this, piston ring pin comes out, gets rammed between the piston crown and squish band, con rod gets bent......very possible, what does the squish band and piston crown look like? Any indentations?

Was thinking similar, something being partially lodged causing excess pressure resulting in the rod being bent. But also the fact its worn the gudgeon pin on one side with needle bearing indentations evident (think thats what OP said) could suggest the main bearing is worn allowing the rod to run on the tilt maybe. A pic of the rod length ways might shed a bit of light

[spudulike]

It isn't always that obvious. As I said, the only way I found my first one was the cylinder would wobble when the machine was slowly rotated with the cylinder loose and being held down with a finger!

[Khriss]

12 hours ago, Frazer Burley said:

That’s the thinking but I also want to not just scrap old saws. 

I love fannying abt with old saws as many are very good still, but yes, some just end up thru fragger, k

[twiggers]

Hello buddy, I have new OEM piston and cylinder if you’re interested. I had a spud ported 346 that was stolen so is no longer needed.

[Frazer Burley]

10 hours ago, twiggers said:

Hello buddy, I have new OEM piston and cylinder if you’re interested. I had a spud ported 346 that was stolen so is no longer needed.

Hi Twiggers. Could be interested. Wanna send a price over on a DM? Cheers

[Frazer Burley]

21 hours ago, Ratman said:

Was thinking similar, something being partially lodged causing excess pressure resulting in the rod being bent. But also the fact its worn the gudgeon pin on one side with needle bearing indentations evident (think thats what OP said) could suggest the main bearing is worn allowing the rod to run on the tilt maybe. A pic of the rod length ways might shed a bit of light

 

[Frazer Burley]

22 hours ago, spudulike said:

Ah...how about this, piston ring pin comes out, gets rammed between the piston crown and squish band, con rod gets bent......very possible, what does the squish band and piston crown look like? Any indentations?

Piston crown being the top surface? No indentations or dings. 
squish band? Piston ring? No dings just fused to piston at one point

[spudulike]

38 minutes ago, Frazer Burley said:

 

IMG_1745.MOV

Never seen one like that, looks like the gudgeon pin is soft and it has had a hard impact. 

Strange on the piston crown. I would have expected damage somewhere from where it ended up. May have been lucky and ended up in the exhaust.

It would be worth inspecting the big end cage - the normal way is to lubricate it, shove the cage to the left, the rod to the right and hold the rod in place and rotate the cage looking for cracks, missing cross sections etc. Repeat on the other side of the rod and then a final check - get the rod in the middle of the big end, push the small end hard to one side and see if the rod still rotates cleanly on the big end by moving the small end to and fro. If it feels notchy, something aint right. A bit subjective but it is my go to test.