bonebreak:

Sorry about the mishap.

MinnFlyer just nailed it!

May be an isolated second small tank feeding from the main one, just to separate bubbles?

Some good articles with info about glow plugs:

http://www.lcrc.org/stu13.htm

http://www.scootworks.com/rdrc/gloplugs.html

http://www.holdfastmac.com.au/howglowplug.html

http://www.horizonhobby.com/Articles...ArticleID=1251

Regards!