How many rpms should a 50 hp Yamaha 4 stroke turn?

What are features for a land yacht? What is the fastest military boat? What was the name of a group of German U boats operating together to attack? How do they get the boat inside the bottle? Was first submarine ride in Passaic river? What test is performed to detect a leak after fueling a gas powered boat? What year was a Iver Johnson 38 spl serial? When wiring new light to old boat wires how do you tell which is the hot wire on light and from boat? Why was sailing invented? What is correct oil mixture for 2hp evinrude mate 1970? When operating at a greater than headway speed at what minimum distance should a skicraft keep? Boating safety advocates suggest that adults wear a pfd during what activity? What does From this boat i see the beginning of time'' mean? What is a general word for a boat or ship? If You see a white buoy with a blue band. What type of buoy is this? How much horsepower does a 1498 cc jet ski engine produce? What does it mean damage to person? How do you find out what year your evinrude motor is? When operating a boat near boats when entering a congested area why should you watch your wake? What does a buoy with both red and green bands mark?