I posted a while back about my 86' Merc 175 that has a four bladed 24p prop....But didn't really get a concise answer.<br /><br />I'm pushing a Ranger 371V, 18 ft, 1988 boat. There is a Jack Plate....<br /><br />At WOT, does 5200-5400 rpms sound normal? The motor runs fine, but wanted to make...