Low Compression and Smokin' Breather Cap

Short answer.... Try Restore

Long answer...

The wife had a car she ran out of oil one time. I got it running & took it to the local mechanic. He said he couldn't fix it.
With nothing to loose, I put a can of *Restore* in it. Car ran just fine for another two years. I don't know what it did but it worked that time.
I have never put it in anything else but would again if I had something that the only other option was to tear it down.

Just put in heavier oil. Don't use that snake oil stuff. They don't help raise compression. Heavier oil may help a little with plugs fouling.

The smoke out breather is simply blow-by caused by oil vaporizing and being "blown" past the compression rings into the block. Check plugs occasionally for fouling. Might want to run a hotter plug too.

Anyway, if I'd wanted a tractor that was mechanically perfect, I wouldn't have picked up one that's 50 years old with a lotta hard hours on it.

Thanks for the response !