I have a 1999 19.5 foot bayliner capri with a 3.0l merc and it currently has a 14 1/4 3 blade 19p prop it is currently running at upper end of rpm range 4800 I am wanting a 4 blade for better water sports performance i am wondering if i should stay at 19p 4 blade or go to 18p 4 blade any...
