Gents, I never liked the F4U-4/B from Korea mod as they show the blades while running. I just fix it. Copy the lines given inside the *.*_DATA.INI of your plane:
Inside [Engine]
SpinnerNodeName=Propeller
StaticPropNodeName=blades
SlowPropNodeName=PropellerB
//FastPropNodeName=PropellerC
That´s it! Thanks all.