i really am not sure how to tell what size prop i have so i am puttin down every thing i saw on the prop. i think it is too big and that is why i dont get over 4000 rpm at WOT.

here is the first code

48,78,122,a40,

this i think is the picth (P21)

this is the other thing i saw on it

THORELL R7199

not sure what this is but i need help with it

thanks fishbonejr :)