I'm having some trouble with my nt 16 For some reason it has been running hot. I have a newer glow plug I have it set on the rich side I'm running 20 % nito and am running 21 % castor oil mix. I have ran about 4 tanks trough it it has been broken in properly. It seems to be lacking power. After I ran it for 5 min it bogged down and died and it won't fire. It is in a fun factor 4wd truck with a single speed gearing. I wonder if i need a new seal kit.[>:]