u don,t see many speed boats around the yachts because they are considered water lice ,they often have a great lack of driving,docking and navigating skill and many have a lack of respect for other vessels on the water. i was reinstalling an radar arch for a lady that owned a 100+foot yacht this summer when a poker run came into port with all there usual fanfare and ear splitting noise. she had the crew get all the tenders out of the water quickly and was upset that the hull would have to be scrubbed again ....i asked her why she did not like the speed boats and got an earful.....they are mostly over ego ed men with the SDS(shortdicksyndrome) who need a fiberglass phallic symbol that does not run very well to get everyone to look at them! she was pointing to all the carbon and slime now floating in the marina and leaving a black ring around her boat. these engines are often so rich they won,t idle with out huge amounts of smoke and carbon witch is amplified buy the owner constantly whacking the throttle trying to clean them out ....and people wonder why they get the cold shoulder from other boaters!