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I replaced the flywheel key, reassembled the unit and it now runs like new. Thanks for all of your help, folks!! - Ken

Awesome. Thanks Czed

Hiya Czed. If I do rings, need I hone the cylinder or may I leave that alone?

Hmmm, that I understand. Keeps the compression reading close to the chamber, hence a more accurate figure [from/in] the chamber Right now, what I am looking for is a more/less figure, to know how far to go in my rebuild with 110 being quite marginal. Though the skirt and chamber really look...

Hi DRF. It does not. Why? Curious Ken

Ring Gap - Good point - Got it, CFB. Piston skirt and crown look really good by the way When I first started wrenching on this 025, I noticed clearly that pulling the recoil was VERY difficult, which yes(?) could be attributed to the busted key. Is that possible or probable? Compression should...

Hello All Thanks much for your words of advice! Compression is low. And yep, the breather tube does look funky. Found the grub plug/SCR and installed What I failed to mention. I replaced: impulse line & filter, coil, plug, fresh fuel mix So I tore this puppy down last night just to see more...

Hello All Stihl 025 will not stay running. Requesting assistance, words of advice Has spark, and compression of 112. No visible scoring from intake or exhaust sides. I have two carbs; one ORIG, one bought on eBay that includes a high-speed ADJ jet. Neither will get this one running. Low miles...