My friend has a 14/21.5 setback skat prop for his 03 but isnt running any heads so i decided to swap him my pump with a 12/19 for his 14/21 ... When i took his stock prop off i didnt see a washer between the prop and pump and i installed the setback and put it in my boat .... Is this going to be a problem ? Should i swap the washer out of the 12/19 and put it behind the 14/21 ? The 12/19 is a non setback ... What would taking the washer out of this setup do ?