I HAVE A MAGNUM 4 CYCLE .53, I CAN'T MANAGE TO GET TO IDE SO THAT THE AIRPLANE DOSEN'T TAKE OFF BY ITSELF. LAST THING I TRIED WAS TO PUT TEFLON ON THE IDLE BAR SO THAT IT WOULD TIGHTEN. I WOULD GREATLY APPRECIATE ANY SUGGESTION ON THA MATTER

Not sure what you mean by idle bar.

A few idea's you should try. Is the engine broken per direction supplied? If not, start over and do a proper breakin. Use an OS F plug, its the best available, you can experiment later. Use an APC or Master Airscrew prop for more of a flywheel effect. Run the top end 300 rpm rich of peak checked with a tach. set the low end for good transition a bit on the rich side. Test fly the plane if it dies on final or after you land, the bottom end is to lean, if not, try leaning the bottom 1/8 and test fly again. I don't know what your talking about concerning an Idle bar but if its an Idle bar glow plug, it has no business being on that engine. If all else fails, put it on a test stand and put the needles back to factory starting point and start over to determin if its a mechanical or tuning issue. Good luck

what i ment was the idle screw. i broke in the motor as per factory directions. this motor is mouted upsidedown on a hanger 9 pulse. the problem is that if i try to lower the idle below 3000 rpm, it stops. as i said before i put teflon on the srew that controls the low.

There's a low speed throttle position screw with a spring around it and there is a low speed fuel mixture screw inside the throttle arm pivot.

Can you guys help me with my hpi T-15. If you can, my problem is that my engine will not stop over heating, i have done every thing that the manual says i must do, but it wont stop over heating. When i run the car with out the body it still over heats, even when it is realy cold and windy. So please save me and tell me what i must do?

Laurence, you have an answer on your other post...

http://www.rcuniverse.com/forum/m_48...tm.htm#4849187

Thanks for pointing me in the right direction. But now i have a new problem. My pull start on my T-15 engine is broken. The wire coil inside the pull start has come off and i dont know how to put it back, i have triyed every thing but i can not get it back in and dont want to buy a new one, so if someone has some directions for me that will be great.