O.K. I have a 57 Evinrude 18 hp. Serial # is 15922-04867. My question is about the reeds. I have a book for evinrude johnson 1971 -85 or something, and another book for 1956-something, The 71-85 books says the reeds should not be removed from the plate. It also says the reeds should be at .010...