Chainsaw Repair

Thanks All! Stay tuned - it's going to take me a few days to get back to this project and get that piston out. I'll send pics ASAP!
In the meantime, I'm puzzled as to why this thing started with one pull and ran just fine until I replaced the chain brake... is it possible that I could get it started again by making some carb adjustments? Is that what's causing the plug to get soaked?
If I CAN get it started, could the scoring on the piston explain why the chain was "bogging down" in the first place?
UPDATE: for $%^#s and giggles I tried adjusting carb settings... started right up, but won't run when throttled up. Will keep looking for resources on carb adjustments. Any recommendations?