Worth a shot?

[hutchkinkaid]

Any chance of this Jonsered 630 cylinder recovering from whatever projectile it was that brought proceedings to a halt?

Will never see more than a few days of work a year; thinking of gluing some 240 grit sandpaper to the top of an old piston, bringing down the high spots on the combustion chamber and putting in a new piston.

No scratches that catch a fingernail.

Got this in a box of parts, no idea what happened to get it to look like this...

 

[irhunter]

I would give the jug the full sandpaper treatment, and decide the next step...after that.

 

[ballisticdoughnut]

I think your on the right track. Just knock down the high spots and run it.

 

[9050LX]

Had an old trail bike break a ring looked like that.And off it ran after new piston.

 

[TLG]

I would suggest replacement. One tiny bit of embedded fragmentation will ruin your new parts installed.
Would also suggest a new wrist pin and bearing. Look real close at the rod big end bearing and cage for debris and cracks before you spend any time on it. Of course heavy fragments will make it down through transfers so a good inspect in order.
Finally if you want a used P&C after this just PM me. Thx TLG

 

[hutchkinkaid]

Thanks people; TLG embedded debris was something I had overlooked...The saw that it would go on I think had a run-in with some straight gas, its piston looks a bit beyond reclamation wouldn't you say? Haven't had a whack at cleaning the cylinder yet, but for sure have some of this piston all over the wall.

 

[Yukon Stihl]

For your own saw that cylinder should clean up fine.