What is your top speed of your Crownline 180BR? Please tell me your engine size, WOT on the dash, number of engine hours, and prop? I have a new 2008 Crownline 180BR with 3.0L mercruiser, it has done 20.5 hours and will only do 30mph at 4000RPM. Seams very slow to me.. can anyone help me to improve my top speed or tell me their top ...