first thing i'd do is replace all the fuel tubing (make sure you use high quality silicone tubing you get from your local hobby shop)
next, find out what the standard needle settings are for that particular engine.
if you can't find it, try 3 1/2 turns out on the high speed needle, and 3 turns out on the low speed.
also, make SURE you go buy a NEW glow plug and NEW fuel.
if that doesn't work, pm or email me
If you don't allow yourself to make mistakes, you'll never allow yourself to succeed