Hi!
Did you use Castor oil previously?
If so, have a look at the air bleed intake hole up front of the carb so it isn't clogged with old gunk oil. Standard setting is with the airbleed hole half open.
Have you changed fuel tank and fuel lines? Do it! Especially if the plane has been sitting for 8 years.

15% nitro is overkill! 5-10% nitro is just fine for the LA engines.

As for props...Use a 12x6, 13x4,13x5, 13x6 or 14x4W APC prop
Glow plug: OS 8 or Enya 3 glow plug.
Tank: 300-350cc (10-12oz) tank.