LOL First I would change the fuel if you can. I haven't heard anything good about Top Fuel. The fuel wont be the cause of your problems though. But I know what is LOL. From the factory the settings extremely rich (to rich). I would give a 1/8 turns to the high speed needle. This should make it better, but if it's still not good enough lean the high speed needle another 1/8 turn. You should know for sure notice a difference, if it's still not whee it should be continue what I said. Make sure you lean it out enough so the engine gets to 200-210 degrees fahrenheit. It is ok to burp the throttle for a second to clear out the oil of the engine, nitro engine will only idle for so long anyways. When you are down the tank, let it cool down with the piston at the bottom of the engine.(Take off the glo-plug to check the piston). Once it has cooled, do a tank at 1/4 throttle, hold the throttle for 3 seconds, then break, keep doing this for the whole tank. Then do a tank with 1/2 throttle and do the 3 seconds burps again. Then do another thing with 3/4 doing the 3 second burps again. Then do another tank at 3/4 to full throttle for 3 second burps again. ALWAYS LET THE ENGINE COOL BETWEEN TANKS WITH THE PISTON AT THE BOTTOM OF THE ENGINE. MAKE SURE THE ENGINE GETS TO 200-210 DEGREES DURING THE TANKS. You should be done for the major break in now and can start tuning for performance, lean out the High speed needle first with 1/8 turns till you see no more performance gains, then back off the needle 1/8 to richen it up a bit. Now do the LSN, lean it at 1/8 turns. The way to check is it's in good is to do the following. Do a high speed pass then bring it in. Pinch the fuel line one inch away from the carburetor. It should idle for 3-5 seconds then speed up and die. If it just dies, it's to lean.
