Hello, I used to race 1/10 touring cars and always used OS engines. A monkey can tune an OS engine and get it to run. I then went to airplanes and they are even easier to tune. Now my neighbor brought his Exceed RC Extreme 4wd off road buggy he has owned for a year and never got it running. I have gotten it to run and have been carefull to keep it rich as to give the engine a chance to break in. I can't keep it running though unless I leave the glow ignighter on the plug. Even then the engine wants to bog down if I go to full throttle. The fuel is a year old so that might not be helping of course. So any tips you have please share. Regardless of my previous experience go ahead and spell it out as if talking to a complete newbie, except I at least know the names of all the parts and the difference between the high and low end needle valves The engine is the .18 CXP, never heard of that before, with a rotory valve carb and dual mixture needles....