LEO .46 Kinda like Model Engine Company of America (MECA)
KB-1L glowplug. Dunno who makes it.
Twice in a row this has happened to me, so I suspect it's not the glow plug:
I install a new glow plug. The engine will run fine for a couple of days, then I will start to see bubbles coming out of the middle of it right where that metal something-or-other sticks up. That metal thing is 1 contact and the case is the other.
I then start to have engine problems. I find myself richening the fuel mixture to get it to run, but only roughly. I replace to glow plug and everything goes back to normal.
< 10 flights with this engine and I've change the glowplug twice. Got another engine exactly like it with ~ 20 flights and the same plug.
Any ideas what can be causing this? Anyone see anything like this before?