I have a Picco Max .26 on 20% nitro, 12% oil on my Revo that is running hot too fast.

What else could cause my engine to run too hot besides if its too lean. I say this because Ive richened my HSN to the point where it wont run at full throttle because it gurgles out and i still get temps of 300 pretty quickly ( like after every 3-4 min run).

Can a off tune LSN cause it to run lean enough for it to get hot? I get sluggish starts when i mash the throttle and then it picks up and hits full speed. I dont know what it could be. I get a good amount of smoke out of the exhaust but it just keeps getting too hot. Any suggestions?