hey everyone i have a Javelin 18 foot with a jonhson 90hp on it right now i am running a 14x21 on at 4000rpms. my manuel say that that the rpm range is from 4500 to 5500. all i use my boat for in just fishing. my qusetion is should i go back to my 14x19 or should i stay with my 14x21. with the 14x21 it uses mores fuel. also should i go with an 14.5x19
thanks for the help
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