Hi Everyone,

Hope someone can help me with this I am kinda new to the RC thing. Heres the problem, I fly an Ultra stick 40 with a magnum 46 XL on it, when I push the trottle to full bore I get a hesitation of about a second or so then the engine will react. Have tried to adjust the low, maybe there is a reference point or something?

Thanks in advance

You must first realize that adjusting the low end affects the hi end on a magnum! So anytime you adjust the low end, back off the hi end and readjust it. then look for the hesitation. This stall can be from either a too rich or a too lean state. Its really hard to tell. 1st question is: how much have you turned in your low end? What type plug? What fuel?
Magnums like castor! 10-15%... Iwould probably stick with 10%. Try an OS #8 or a K&B 1L. If you turned the low end needle in alot then back it off 3-4 turns and start over using the above method in 1/8-1/4 turn increments. If you have'nt turned the low end needle much then continue w/leaning the low end as mentioned above. Also how much fuel has been run through the motor. You need to run at least 3 tanks through it at 3500-4500rpm before you ever try to adjust idle.