after 3 yrs standing on my ucd i finelly got the time to sart using my ys fz 63

fual tank : hays 12oz - located on cg
prop apc 12-6
fuel cp 30% heli

the angine started
at first the eingine started but did nit pass 1/4 throttle
after some time it got to the 1/2 throttle but no more then that
no metter what i did i simply had no been able to go to full throttle

any suggestions ???

10x

sharon :-)