Hello. I have a 1998 290 Sundancer with twin 5.7's The boat has 14.5 x 19P stainless steel props great shape. It dogs trying to get up on plane with three other couples on board. Need to have people walk toward the bow. Also runs around 3600 to keep it up on plane. Someone suggested to go to 18P props. hey say it gets up faster and runs around 400 rpms slower.