Am I boned? MS 261 jug

[kingOFgEEEks]

Apparently I hung a ring. I'm not sure how. New OEM piston on a cleaned up jug. No port work.

Can I clean it back up, and smooth the bevel around the transfer and exhaust where it is damaged?

 

[Mastermind]

Looks pretty bad.

 

[Four Paws]

Are you sure you didn't spit a clip? Looks like recycling to me...time for a new top end.

 

[kingOFgEEEks]

The ring was in 3 pieces when I pulled the jug. Possibly 1 piece took a trip around?

Looks like it's one for the shelf of horrors.

 

[cus_deluxe]

Yes

 

[lwhaples]

Dang.

 

[dall]

there was a used one on ebay for 45 but its gone now

 

[kingOFgEEEks]

Fortunately, I had a spare. It's not a spare anymore.

 

[blsnelling]

Stock jug?

 

[smokey7]

Hey man good to see another builder around..... Always enjoyed your builds.

 

[TJ the Chainsaw Mechanic]

New top end should be on the list.

 

[kingOFgEEEks]

OEM jug.

 

[kingOFgEEEks]

I got a chance to pull the piston off. The circlips were intact. I think the bottom ring broke somehow. Anything to look out for when I reassemble? What's the best way to get the bits of broken ring out of the crankcase?

 

[jmssaws]

Look close at the big end bearing for anything missing.
Wrist pin bearing intact?

 

[kingOFgEEEks]

Big end bearing looks ok. The wrist bearing is in perfect shape. I will take a closer look tomorrow when I go to reassemble.

 

[jmssaws]

It can be hard to see a missing needle
It looks like it ate something from somewhere.

 

[kingOFgEEEks]

It definitely ate something. My gut says I somehow broke a ring, because it was in pieces when I tore it down, but how? I will inspect the big end to be sure. If a needle is missing, I have my answer.

 

[CR888]

Muffler can rattle?

 

[Chainsaw Jim]

I'm wondering if a chunk of bearing or cage let loose and caused the piston to bind enough to hang up like that.

 

[drf256]

Wow

Glad u had a spare.