My Reedy has been running great since I bought it used and now all of a sudden it's blowing plugs after a couple tanks.

Ya'll think it's low on compression and could use a pinch?

It "supposedly" had around 3 gallons on it when I bought it used on here and I've put almost a gallon on it.

Runs awesome when running but unless I keep the glow igniter on it the engine will die at idle. Put a new plug in it and it runs perfect for a while and then does the same thing again. Won't stay running without igniter on it.
Running OS plugs. Tried P4 and P3 with same effect.